• Create Analog Input Channels
  • DAQmxCreateAIAccelChan
  • DAQmxCreateAIAccel4WireDCVoltageChan
  • DAQmxCreateAIAccelChargeChan
  • DAQmxCreateAIBridgeChan
  • DAQmxCreateAIChargeChan
  • DAQmxCreateAICurrentChan
  • DAQmxCreateAICurrentRMSChan
  • DAQmxCreateAIForceBridgePolynomialChan
  • DAQmxCreateAIForceBridgeTableChan
  • DAQmxCreateAIForceBridgeTwoPointLinChan
  • DAQmxCreateAIForceIEPEChan
  • DAQmxCreateAIFreqVoltageChan
  • DAQmxCreateAIMicrophoneChan
  • DAQmxCreateAIPressureBridgePolynomialChan
  • DAQmxCreateAIPressureBridgeTableChan
  • DAQmxCreateAIPressureBridgeTwoPointLinChan
  • DAQmxCreateAIResistanceChan
  • DAQmxCreateAIRosetteStrainGageChan
  • DAQmxCreateAIRTDChan
  • DAQmxCreateAIStrainGageChan
  • DAQmxCreateAITempBuiltInSensorChan
  • DAQmxCreateAIThrmcplChan
  • DAQmxCreateAIThrmstrChanIex
  • DAQmxCreateAIThrmstrChanVex
  • DAQmxCreateAITorqueBridgePolynomialChan
  • DAQmxCreateAITorqueBridgeTableChan
  • DAQmxCreateAITorqueBridgeTwoPointLinChan
  • DAQmxCreateAIVelocityIEPEChan
  • DAQmxCreateAIVoltageChan
  • DAQmxCreateAIVoltageRMSChan
  • DAQmxCreateAIVoltageChanWithExcit
  • DAQmxCreateAIPosEddyCurrProxProbeChan
  • DAQmxCreateAIPosLVDTChan
  • DAQmxCreateAIPosRVDTChan
• Create TEDS Analog Input Channels
  • DAQmxCreateTEDSAIAccelChan
  • DAQmxCreateTEDSAICurrentChan
  • DAQmxCreateTEDSAIBridgeChan
  • DAQmxCreateTEDSAIForceBridgeChan
  • DAQmxCreateTEDSAIForceIEPEChan
  • DAQmxCreateTEDSAIMicrophoneChan
  • DAQmxCreateTEDSAIPressureBridgeChan
  • DAQmxCreateTEDSAIResistanceChan
  • DAQmxCreateTEDSAIRTDChan
  • DAQmxCreateTEDSAIStrainGageChan
  • DAQmxCreateTEDSAIThrmcplChan
  • DAQmxCreateTEDSAIThrmstrChanIex
  • DAQmxCreateTEDSAIThrmstrChanVex
  • DAQmxCreateTEDSAITorqueBridgeChan
  • DAQmxCreateTEDSAIVoltageChan
  • DAQmxCreateTEDSAIVoltageChanWithExcit
  • DAQmxCreateTEDSAIPosLVDTChan
  • DAQmxCreateTEDSAIPosRVDTChan
• Create Analog Output Channel
  • DAQmxCreateAOCurrentChan
  • DAQmxCreateAOFuncGenChan
  • DAQmxCreateAOVoltageChan
• Create Digital Input Channels
  • DAQmxCreateDIChan
• Create Digital Output Channels
  • DAQmxCreateDOChan
• Create Counter Input Channels
  • DAQmxCreateCIAngVelocityChan
  • DAQmxCreateCICountEdgesChan
  • DAQmxCreateCIDutyCycleChan
  • DAQmxCreateCIFreqChan
  • DAQmxCreateCILinVelocityChan
  • DAQmxCreateCIPeriodChan
  • DAQmxCreateCIPulseChanFreq
  • DAQmxCreateCIPulseChanTicks
  • DAQmxCreateCIPulseChanTime
  • DAQmxCreateCIPulseWidthChan
  • DAQmxCreateCISemiPeriodChan
  • DAQmxCreateCITwoEdgeSepChan
  • DAQmxCreateCILinEncoderChan
  • DAQmxCreateCIAngEncoderChan
  • DAQmxCreateCIGPSTimestampChan
• Create Counter Output Channels
  • DAQmxCreateCOPulseChanFreq
  • DAQmxCreateCOPulseChanTicks
  • DAQmxCreateCOPulseChanTime

int32 DAQmxCreateAIAccelChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, float64 minVal, float64 maxVal, int32 units, float64 sensitivity, int32 sensitivityUnits, int32 currentExcitSource, float64 currentExcitVal, const char customScaleName[]);

Creates channel(s) that use an accelerometer to measure acceleration and adds the channel(s) to the task you specify with taskHandle.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
terminalConfig	int32	The input terminal configuration for the channel.

Value		Description
DAQmx_Val_Cfg_Default		At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE		Referenced single-ended mode
DAQmx_Val_NRSE		Non-referenced single-ended mode
DAQmx_Val_Diff		Differential mode
DAQmx_Val_PseudoDiff		Pseudodifferential mode

minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return acceleration measurements from the channel.

Name		Description
DAQmx_Val_AccelUnit_g		G-force (g). 1 g is approximately equal to 9.81 m/s2.
DAQmx_Val_FromCustomScale		Units specified by a custom scale. Use customScaleName to specify a custom scale.

sensitivity	float64	The sensitivity of the sensor. This value is in the units you specify with the sensitivityUnits input. Refer to the sensor documentation to determine this value.
sensitivityUnits	int32	The units of sensitivity.

Name		Description
DAQmx_Val_mVoltsPerG		mVolts/g.
DAQmx_Val_VoltsPerG		Volts/g.

currentExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel. You cannot use this value if the sensor requires excitation.

currentExcitVal	float64	The amount of excitation, in amperes, that the sensor requires.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

DAQmxCreateAIAccel4WireDCVoltageChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, float64 minVal, float64 maxVal, int32 units, float64 sensitivity, int32 sensitivityUnits, int32 voltageExcitSource, float64 voltageExcitVal, bool32 useExcitForScaling, const char customScaleName[]);

Creates channel(s) to measure acceleration. Use this function for custom sensors that require excitation. You can use the excitation to scale the measurement.

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
terminalConfig	int32	The input terminal configuration for the channel.

Value		Description
DAQmx_Val_Cfg_Default		At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE		Referenced single-ended mode
DAQmx_Val_NRSE		Non-referenced single-ended mode
DAQmx_Val_Diff		Differential mode
DAQmx_Val_PseudoDiff		Pseudodifferential mode

minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return from the channel.

Value		Description
DAQmx_Val_FromCustomScale		Units a custom scale specifies. If you select this value, you must specify a custom scale name.
DAQmx_Val_g		Grams
DAQmx_Val_MetersPerSecondSquared		Meters per second squared
DAQmx_Val_InchesPerSecondSquared		Inches per second squared

sensitivity	float64	The sensitivity of the sensor. This value is in the units you specify with the sensitivityUnits input. Refer to the sensor documentation to determine this value.
sensitivityUnits	int32	The units of sensitivity.

Name		Description
DAQmx_Val_mVoltsPerG		Millivolts per gram
DAQmx_Val_VoltsPerG		Volts per gram

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
useExcitForScaling	bool32	Whether the excitation voltage will be used to scale the returned data
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

DAQmxCreateAIAccelChargeChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, float64 minVal, float64 maxVal, int32 units, float64 sensitivity, int32 sensitivityUnits, const char customScaleName[]);

Creates channel(s) that use a charge-based sensor to measure acceleration.

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
terminalConfig	int32	The input terminal configuration for the channel.

Value		Description
DAQmx_Val_Cfg_Default		At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE		Referenced single-ended mode
DAQmx_Val_NRSE		Non-referenced single-ended mode
DAQmx_Val_Diff		Differential mode
DAQmx_Val_PseudoDiff		Pseudodifferential mode

minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return from the channel.

Value		Description
DAQmx_Val_FromCustomScale		Units a custom scale specifies. If you select this value, you must specify a custom scale name.
DAQmx_Val_AccelUnit_g		Grams
DAQmx_Val_MetersPerSecondSquared		Meters per second squared
DAQmx_Val_InchesPerSecondSquared		Inches per second squared

sensitivity	float64	The sensitivity of the sensor. This value is in the units you specify with the sensitivityUnits input. Refer to the sensor documentation to determine this value.
sensitivityUnits	int32	The units of sensitivity.

Name		Description
DAQmx_Val_PicoCoulombsPerG		pCoulomb/g
DAQmx_Val_PicoCoulombsPerMetersPerSecondSquared		pCoulomb/(m/s^2)
DAQmx_Val_PicoCoulombsPerInchesPerSecondSquared		pCoulomb/(in/s^2)

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIBridgeChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 bridgeConfig, int32 voltageExcitSource, float64 voltageExcitVal, float64 nominalBridgeResistance, const char customScaleName[]);

Creates channel(s) that measure voltage ratios from a Wheatstone bridge.

Use this instance with bridge-based sensors that measure phenomena other than strain, force, pressure, or torque, or that scale data to physical units NI-DAQmx does not support.

Use a custom scale or other scaling code to convert the voltage ratios to physical units.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return voltage ratios from the channel.

Name		Description
DAQmx_Val_VoltsPerVolt		volts per volt
DAQmx_Val_mVoltsPerVolt		millivolts per volt
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

bridgeConfig	int32	Specifies the Wheatstone bridge configuration connected to the channel.

Value		Description
DAQmx_Val_FullBridge		Four active sensing elements in the bridge
DAQmx_Val_HalfBridge		Two active sensing elements in the bridge
DAQmx_Val_QuarterBridge		One active sensing element in the bridge

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
nominalBridgeResistance	float64	Specifies in ohms the resistance of the bridge while not under load.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

DAQmxCreateAIChargeChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, float64 minVal, float64 maxVal, int32 units, const char customScaleName[]);

Creates channel(s) that use a sensor with charge output.

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
terminalConfig	int32	The input terminal configuration for the channel.

Value		Description
DAQmx_Val_Cfg_Default		At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE		Referenced single-ended mode
DAQmx_Val_NRSE		Non-referenced single-ended mode
DAQmx_Val_Diff		Differential mode
DAQmx_Val_PseudoDiff		Pseudodifferential mode

minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return from the channel.

Value		Description
DAQmx_Val_FromCustomScale		Units a custom scale specifies. If you select this value, you must specify a custom scale name.
DAQmx_Val_Coulombs		Coulombs
DAQmx_Val_PicoCoulombs		Picocoulombs

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAICurrentChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, float64 minVal, float64 maxVal, int32 units, int32 shuntResistorLoc, float64 extShuntResistorVal, const char customScaleName[]);

Creates channel(s) for current measurement and adds the channel(s) to the task you specify with taskHandle.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
terminalConfig	int32	The input terminal configuration for the channel.

Value		Description
DAQmx_Val_Cfg_Default		At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE		Referenced single-ended mode
DAQmx_Val_NRSE		Non-referenced single-ended mode
DAQmx_Val_Diff		Differential mode
DAQmx_Val_PseudoDiff		Pseudodifferential mode

minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Value		Description
DAQmx_Val_Amps		amperes
DAQmx_Val_FromCustomScale		Units a custom scale specifies. If you select this value, you must specify a custom scale name.

shuntResistorLoc	int32	The location of the shunt resistor.

Value		Description
DAQmx_Val_Default		At run time, NI-DAQmx chooses the default shunt resistor location for the channel.
DAQmx_Val_Internal		Use the built-in shunt resistor of the device.
DAQmx_Val_External		Use a shunt resistor external to the device. You must specify the value of the shunt resistor in extShuntResistorVal.

extShuntResistorVal	float64	The value, in ohms, of an external shunt resistor.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAICurrentRMSChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, float64 minVal, float64 maxVal, int32 units, int32 shuntResistorLoc, float64 extShuntResistorVal, const char customScaleName[]);

Creates channel(s) for RMS current measurement and adds the channel(s) to the task you specify with taskHandle.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
terminalConfig	int32	The input terminal configuration for the channel.

Value		Description
DAQmx_Val_Cfg_Default		At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE		Referenced single-ended mode
DAQmx_Val_NRSE		Non-referenced single-ended mode
DAQmx_Val_Diff		Differential mode
DAQmx_Val_PseudoDiff		Pseudodifferential mode

minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Value		Description
DAQmx_Val_Amps		amperes
DAQmx_Val_FromCustomScale		Units a custom scale specifies. If you select this value, you must specify a custom scale name.

shuntResistorLoc	int32	The location of the shunt resistor.

Value		Description
DAQmx_Val_Default		At run time, NI-DAQmx chooses the default shunt resistor location for the channel.
DAQmx_Val_Internal		Use the built-in shunt resistor of the device.
DAQmx_Val_External		Use a shunt resistor external to the device. You must specify the value of the shunt resistor in extShuntResistorVal.

extShuntResistorVal	float64	The value, in ohms, of an external shunt resistor.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIForceBridgePolynomialChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 bridgeConfig, int32 voltageExcitSource, float64 voltageExcitVal, float64 nominalBridgeResistance, const float64 forwardCoeffs[], uInt32 numForwardCoeffs, const float64 reverseCoeffs[], uInt32 numReverseCoeffs, int32 electricalUnits, int32 physicalUnits, const char customScaleName[]);

Creates channel(s) that use a Wheatstone bridge to measure force or load.

Use this instance with sensors whose specifications provide a polynomial to convert electrical values to physical values.

When you use this scaling type, NI-DAQmx requires coefficients for a polynomial that converts electrical values to physical values (forward), as well as coefficients for a polynomial that converts physical values to electrical values (reverse). If you only know one set of coefficients, use the DAQmxCalculateReversePolyCoeff function to generate the other set.

Specify different values for units and physicalUnits if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return force measurements from the channel.

Name		Description
DAQmx_Val_Newtons		newtons
DAQmx_Val_Pounds		pounds
DAQmx_Val_KilogramForce		kilograms-force
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

bridgeConfig	int32	Specifies the Wheatstone bridge configuration connected to the channel.

Value		Description
DAQmx_Val_FullBridge		Four active sensing elements in the bridge
DAQmx_Val_HalfBridge		Two active sensing elements in the bridge
DAQmx_Val_QuarterBridge		One active sensing element in the bridge

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
nominalBridgeResistance	float64	Specifies in ohms the resistance of the bridge while not under load.
forwardCoeffs	const float64 []	An array of coefficients for the polynomial that converts electrical values to physical values. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x^3.
numForwardCoeffs	uInt32	The number of coefficients in the forwardCoeffs array.
reverseCoeffs	const float64 []	An array of coefficients for the polynomial that converts physical values to electrical values. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x^3.
numReverseCoeffs	uInt32	The number of coefficients in the reverseCoeffs array.
electricalUnits	int32	Specifies from which electrical unit to scale data. Select the same unit that the sensor data sheet or calibration certificate uses for electrical values.

Value		Description
DAQmx_Val_VoltsPerVolt		volts per volt
DAQmx_Val_mVoltsPerVolt		millivolts per volt

physicalUnits	int32	Specifies to which physical units to scale electrical data. Select the same unit that the sensor data sheet or calibration certificate uses for physical values.

Value		Description
DAQmx_Val_Newtons		newtons
DAQmx_Val_Pounds		pounds
DAQmx_Val_KilogramForce		kilograms-force

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIForceBridgeTableChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 bridgeConfig, int32 voltageExcitSource, float64 voltageExcitVal, float64 nominalBridgeResistance, const float64 electricalVals[], uInt32 numElectricalVals, int32 electricalUnits, const float64 physicalVals[], uInt32 numPhysicalVals, int32 physicalUnits, const char customScaleName[]);

Creates channel(s) that use a Wheatstone bridge to measure force or load.

Use this instance with sensors whose specifications provide a table of electrical values and the corresponding physical values.

When you use this scaling type, NI-DAQmx performs linear scaling between each pair of electrical and physical values. The input limits specified with minVal and maxVal must fall within the smallest and largest physical values. For any data outside those endpoints, NI-DAQmx coerces that data to the endpoints.

Specify different values for units and physicalUnits if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return force measurements from the channel.

Name		Description
DAQmx_Val_Newtons		newtons
DAQmx_Val_Pounds		pounds
DAQmx_Val_KilogramForce		kilograms-force
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

bridgeConfig	int32	Specifies the Wheatstone bridge configuration connected to the channel.

Value		Description
DAQmx_Val_FullBridge		Four active sensing elements in the bridge
DAQmx_Val_HalfBridge		Two active sensing elements in the bridge
DAQmx_Val_QuarterBridge		One active sensing element in the bridge

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
nominalBridgeResistance	float64	Specifies in ohms the resistance of the bridge while not under load.
electricalVals	const float64 []	The array of electrical values that map to the values in physicalVals. Specify this value in the unit indicated by electricalUnits.
numElectricalVals	uInt32	The number of electrical values in the electricalVals array.
electricalUnits	int32	Specifies from which electrical unit to scale data. Select the same unit that the sensor data sheet or calibration certificate uses for electrical values.

Value		Description
DAQmx_Val_VoltsPerVolt		volts per volt
DAQmx_Val_mVoltsPerVolt		millivolts per volt

physicalVals	const float64 []	The array of physical values that map to the values in electricalVals. Specify this value in the unit indicated by physicalUnits.
numPhysicalVals	uInt32	The number of physical values in the physicalVals array.
physicalUnits	int32	Specifies to which physical units to scale electrical data. Select the same unit that the sensor data sheet or calibration certificate uses for physical values.

Value		Description
DAQmx_Val_Newtons		newtons
DAQmx_Val_Pounds		pounds
DAQmx_Val_KilogramForce		kilograms-force

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIForceBridgeTwoPointLinChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 bridgeConfig, int32 voltageExcitSource, float64 voltageExcitVal, float64 nominalBridgeResistance, float64 firstElectricalVal, float64 secondElectricalVal, int32 electricalUnits, float64 firstPhysicalVal, float64 secondPhysicalVal, int32 physicalUnits, const char customScaleName[]);

Creates channel(s) that use a Wheatstone bridge to measure force or load.

Use this instance with sensors whose specifications do not provide a polynomial for scaling or a table of electrical and physical values.

When you use this scaling type, NI-DAQmx uses two points of electrical and physical values to calculate the slope and y-intercept of a linear equation and uses that equation to scale electrical values to physical values.

Specify different values for units and physicalUnits if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return force measurements from the channel.

Name		Description
DAQmx_Val_Newtons		newtons
DAQmx_Val_Pounds		pounds
DAQmx_Val_KilogramForce		kilograms-force
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

bridgeConfig	int32	Specifies the Wheatstone bridge configuration connected to the channel.

Value		Description
DAQmx_Val_FullBridge		Four active sensing elements in the bridge
DAQmx_Val_HalfBridge		Two active sensing elements in the bridge
DAQmx_Val_QuarterBridge		One active sensing element in the bridge

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
nominalBridgeResistance	float64	Specifies in ohms the resistance of the bridge while not under load.
firstElectricalVal	float64	The first electrical value, corresponding to firstPhysicalVal. Specify this value in the unit indicated by electricalUnits.
secondElectricalVal	float64	The second electrical value, corresponding to secondPhysicalVal. Specify this value in the unit indicated by electricalUnits.
electricalUnits	int32	Specifies from which electrical unit to scale data. Select the same unit that the sensor data sheet or calibration certificate uses for electrical values.

Value		Description
DAQmx_Val_VoltsPerVolt		volts per volt
DAQmx_Val_mVoltsPerVolt		millivolts per volt

firstPhysicalVal	float64	The first physical value, corresponding to firstElectricalVal. Specify this value in the unit indicated by physicalUnits.
secondPhysicalVal	float64	The second physical value, corresponding to secondElectricalValue. Specify this value in the unit indicated by physicalUnits.
physicalUnits	int32	Specifies to which physical units to scale electrical data. Select the same unit that the sensor data sheet or calibration certificate uses for physical values.

Value		Description
DAQmx_Val_Newtons		newtons
DAQmx_Val_Pounds		pounds
DAQmx_Val_KilogramForce		kilograms-force

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIForceIEPEChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, float64 minVal, float64 maxVal, int32 units, float64 sensitivity, int32 sensitivityUnits, int32 currentExcitSource, float64 currentExcitVal, const char customScaleName[]);

Creates channel(s) that use an IEPE force sensor to measure force or load.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
terminalConfig	int32	The input terminal configuration for the channel.

Value		Description
DAQmx_Val_Cfg_Default		At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE		Referenced single-ended mode
DAQmx_Val_NRSE		Non-referenced single-ended mode
DAQmx_Val_Diff		Differential mode
DAQmx_Val_PseudoDiff		Pseudodifferential mode

minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return force measurements from the channel.

Name		Description
DAQmx_Val_Newtons		newtons
DAQmx_Val_Pounds		pounds
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

sensitivity	float64	The sensitivity of the sensor. This value is in the units you specify with the sensitivityUnits input. Refer to the sensor documentation to determine this value.
sensitivityUnits	int32	The units of sensitivity input.

Name		Description
DAQmx_Val_mVoltsPerNewton		millivolts per newton
DAQmx_Val_mVoltsPerPound		millivolts per pound

currentExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel. You cannot use this value if the sensor requires excitation.

currentExcitVal	float64	The amount of excitation, in amperes, that the sensor requires.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIFreqVoltageChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, float64 thresholdLevel, float64 hysteresis, const char customScaleName[]);

Creates channel(s) that use a frequency-to-voltage converter to measure frequency and adds the channel(s) to the task you specify with taskHandle.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Name		Description
DAQmx_Val_Hz		hertz
DAQmx_Val_FromCustomScale		Units specified by a custom scale. Use customScaleName to specify a custom scale.

thresholdLevel	float64	The voltage level at which to recognize waveform repetitions.
hysteresis	float64	Specifies in volts a window below thresholdLevel. The input voltage must pass below thresholdLevel minus hysteresis before NI-DAQmx recognizes a waveform repetition. Hysteresis can improve measurement accuracy when the signal contains noise or jitter.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIMicrophoneChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, int32 units, float64 micSensitivity, float64 maxSndPressLevel, int32 currentExcitSource, float64 currentExcitVal, const char customScaleName[]);

Creates channel(s) that use a microphone to measure sound pressure and adds the channel(s) to the task you specify with taskHandle.

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
terminalConfig	int32	The input terminal configuration for the channel.

Value		Description
DAQmx_Val_Cfg_Default		At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE		Referenced single-ended mode
DAQmx_Val_NRSE		Non-referenced single-ended mode
DAQmx_Val_Diff		Differential mode
DAQmx_Val_PseudoDiff		Pseudodifferential mode

units	int32	The units to use to return sound pressure measurements.

Name		Description
DAQmx_Val_Pascals		pascals
DAQmx_Val_FromCustomScale		Units specified by a custom scale. Use customScaleName to specify a custom scale.

micSensitivity	float64	The sensitivity of the microphone. Specify this value in millivolts per pascal.
maxSndPressLevel	float64	The maximum instantaneous sound pressure level you expect to measure. This value is in decibels, referenced to 20 micropascals.
currentExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel. You cannot use this value if the sensor requires excitation.

currentExcitVal	float64	The amount of excitation, in amperes, that the sensor requires.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIPressureBridgePolynomialChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 bridgeConfig, int32 voltageExcitSource, float64 voltageExcitVal, float64 nominalBridgeResistance, const float64 forwardCoeffs[], uInt32 numForwardCoeffs, const float64 reverseCoeffs[], uInt32 numReverseCoeffs, int32 electricalUnits, int32 physicalUnits, const char customScaleName[]);

Creates channel(s) that use a Wheatstone bridge to measure pressure.

Use this instance with sensors whose specifications provide a polynomial to convert electrical values to physical values.

When you use this scaling type, NI-DAQmx requires coefficients for a polynomial that converts electrical values to physical values (forward), as well as coefficients for a polynomial that converts physical values to electrical values (reverse). If you only know one set of coefficients, use the DAQmxCalculateReversePolyCoeff function to generate the other set.

Specify different values for units and physicalUnits if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return pressure measurements from the channel.

Name		Description
DAQmx_Val_PoundsPerSquareInch		pounds per square inch
DAQmx_Val_Bar		bar
DAQmx_Val_Pascals		pascals
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

bridgeConfig	int32	Specifies the Wheatstone bridge configuration connected to the channel.

Value		Description
DAQmx_Val_FullBridge		Four active sensing elements in the bridge
DAQmx_Val_HalfBridge		Two active sensing elements in the bridge
DAQmx_Val_QuarterBridge		One active sensing element in the bridge

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
nominalBridgeResistance	float64	Specifies in ohms the resistance of the bridge while not under load.
forwardCoeffs	const float64 []	An array of coefficients for the polynomial that converts electrical values to physical values. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x^3.
numForwardCoeffs	uInt32	The number of coefficients in the forwardCoeffs array.
reverseCoeffs	const float64 []	An array of coefficients for the polynomial that converts physical values to electrical values. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x^3.
numReverseCoeffs	uInt32	The number of coefficients in the reverseCoeffs array.
electricalUnits	int32	Specifies from which electrical unit to scale data. Select the same unit that the sensor data sheet or calibration certificate uses for electrical values.

Value		Description
DAQmx_Val_VoltsPerVolt		volts per volt
DAQmx_Val_mVoltsPerVolt		millivolts per volt

physicalUnits	int32	Specifies to which physical unit to scale electrical data. Select the same unit that the sensor data sheet or calibration certificate uses for physical values.

Value		Description
DAQmx_Val_PoundsPerSquareInch		pounds per square inch
DAQmx_Val_Bar		bar
DAQmx_Val_Pascals		pascals

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIPressureBridgeTableChan(TaskHandle taskHandle,const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal,float64 maxVal, int32 units, int32 bridgeConfig, int32 voltageExcitSource, float64 voltageExcitVal, float64 nominalBridgeResistance, const float64 electricalVals[], uInt32 numElectricalVals, int32 electricalUnits, const float64 physicalVals[], uInt32 numPhysicalVals, int32 physicalUnits, const char customScaleName[]);

Creates channel(s) that use a Wheatstone bridge to measure pressure.

Use this instance with sensors whose specifications provide a table of electrical values and the corresponding physical values.

When you use this scaling type, NI-DAQmx performs linear scaling between each pair of electrical and physical values. The input limits specified with minVal and maxVal must fall within the smallest and largest physical values. For any data outside those endpoints, NI-DAQmx coerces that data to the endpoints.

Specify different values for units and physicalUnits if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return pressure measurements from the channel.

Name		Description
DAQmx_Val_PoundsPerSquareInch		pounds per square inch
DAQmx_Val_Bar		bar
DAQmx_Val_Pascals		pascals
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

bridgeConfig	int32	Specifies the Wheatstone bridge configuration connected to the channel.

Value		Description
DAQmx_Val_FullBridge		Four active sensing elements in the bridge
DAQmx_Val_HalfBridge		Two active sensing elements in the bridge
DAQmx_Val_QuarterBridge		One active sensing element in the bridge

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
nominalBridgeResistance	float64	Specifies in ohms the resistance of the bridge while not under load.
electricalVals	const float64 []	The array of electrical values that map to the values in physicalVals. Specify this value in the unit indicated by electricalUnits.
numElectricalVals	uInt32	The number of electrical values in the electricalVals array.
electricalUnits	int32	Specifies from which electrical unit to scale data. Select the same unit that the sensor data sheet or calibration certificate uses for electrical values.

Value		Description
DAQmx_Val_VoltsPerVolt		volts per volt
DAQmx_Val_mVoltsPerVolt		millivolts per volt

physicalVals	const float64 []	The array of physical values that map to the values in electricalVals. Specify this value in the unit indicated by physicalUnits.
numPhysicalVals	uInt32	The number of physical values in the physicalVals array.
physicalUnits	int32	Specifies to which physical unit to scale electrical data. Select the same unit that the sensor data sheet or calibration certificate uses for physical values.

Value		Description
DAQmx_Val_PoundsPerSquareInch		pounds per square inch
DAQmx_Val_Bar		bar
DAQmx_Val_Pascals		pascals

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIPressureBridgeTwoPointLinChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 bridgeConfig, int32 voltageExcitSource, float64 voltageExcitVal, float64 nominalBridgeResistance, float64 firstElectricalVal, float64 secondElectricalVal, int32 electricalUnits, float64 firstPhysicalVal, float64 secondPhysicalVal, int32 physicalUnits, const char customScaleName[]);

Creates channel(s) that use a Wheatstone bridge to measure pressure.

Use this instance with sensors whose specifications do not provide a polynomial for scaling or a table of electrical and physical values.

When you use this scaling type, NI-DAQmx uses two points of electrical and physical values to calculate the slope and y-intercept of a linear equation and uses that equation to scale electrical values to physical values.

Specify different values for units and physicalUnits if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return pressure measurements from the channel.

Name		Description
DAQmx_Val_PoundsPerSquareInch		pounds per square inch
DAQmx_Val_Bar		bar
DAQmx_Val_Pascals		pascals
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

bridgeConfig	int32	Specifies the Wheatstone bridge configuration connected to the channel.

Value		Description
DAQmx_Val_FullBridge		Four active sensing elements in the bridge
DAQmx_Val_HalfBridge		Two active sensing elements in the bridge
DAQmx_Val_QuarterBridge		One active sensing element in the bridge

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
nominalBridgeResistance	float64	Specifies in ohms the resistance of the bridge while not under load.
firstElectricalVal	float64	The first electrical value, corresponding to firstPhysicalVal. Specify this value in the unit indicated by electricalUnits.
secondElectricalVal	float64	The second electrical value, corresponding to secondPhysicalVal. Specify this value in the unit indicated by electricalUnits.
electricalUnits	int32	Specifies from which electrical unit to scale data. Select the same unit that the sensor data sheet or calibration certificate uses for electrical values.

Value		Description
DAQmx_Val_VoltsPerVolt		volts per volt
DAQmx_Val_mVoltsPerVolt		millivolts per volt

firstPhysicalVal	float64	The first physical value, corresponding to firstElectricalVal. Specify this value in the unit indicated by physicalUnits.
secondPhysicalVal	float64	The second physical value, corresponding to secondElectricalValue. Specify this value in the unit indicated by physicalUnits.
physicalUnits	int32	Specifies to which physical unit to scale electrical data. Select the same unit that the sensor data sheet or calibration certificate uses for physical values.

Value		Description
DAQmx_Val_PoundsPerSquareInch		pounds per square inch
DAQmx_Val_Bar		bar
DAQmx_Val_Pascals		pascals

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIResistanceChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 resistanceConfig, int32 currentExcitSource, float64 currentExcitVal, const char customScaleName[]);

Create channel(s) to measure resistance and adds the channel(s) to the task you specify with taskHandle.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Name		Description
DAQmx_Val_Ohms		ohms
DAQmx_Val_FromCustomScale		Units specified by a custom scale. Use customScaleName to specify a custom scale.

resistanceConfig	int32	The configuration for resistance measurements.

Value		Description
DAQmx_Val_2Wire		2-wire mode.
DAQmx_Val_3Wire		3-wire mode.
DAQmx_Val_4Wire		4-wire mode.

currentExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel. You cannot use this value if the sensor requires excitation.

currentExcitVal	float64	The amount of excitation, in amperes, that the sensor requires.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIRosetteStrainGageChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 rosetteType, float64 gageOrientation, const int32 rosetteMeasTypes[], uInt32 numRosetteMeasTypes, int32 strainConfig, int32 voltageExcitSource, float64 voltageExcitVal, float64 gageFactor, float64 nominalGageResistance, float64 poissonRatio, float64 leadWireResistance);

Creates channel(s) to measure strain and adds the channel(s) to the task you specify with taskHandle.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	Specifies the minimum strain you expect to measure. This value applies to each strain gage in the rosette.
maxVal	float64	Specifies the maximum strain you expect to measure. This value applies to each strain gage in the rosette.
rosetteType	int32	Specifies the type of the rosette.

Value		Description
DAQmx_Val_RectangularRosette		A rectangular rosette consists of three strain gages, each separated by a 45 degree angle.
DAQmx_Val_DeltaRosette		A delta rosette consists of three strain gages, each separated by a 60 degree angle.
DAQmx_Val_TeeRosette		A tee rosette consists of two strain gages oriented at 90 degrees with respect to each other.

gageOrientation	float64	Specifies, in degrees, the orientation of the gage with respect to the preferred X axis. This parameter applies only to Cartesian measurements.
rosetteMeasTypes	const int32 []	Specifies the virtual channels to create for the rosette measurements. For each rosette sensor, the function creates one strain virtual channel for each strain gage in the rosette, and one rosette virtual channel for each measurement specified in the rosette measurements array.

Value		Description
DAQmx_Val_PrincipalStrain1		The maximum tensile strain coplanar to the surface of the material under stress.
DAQmx_Val_PrincipalStrain2		The minimum tensile strain coplanar to the surface of the material under stress.
DAQmx_Val_PrincipalStrainAngle		The angle, in degrees, at which the principal strains of the rosette occur with respect to the preferred X axis. The range is -180 degrees to 180 degrees, where negative values are angles below the X axis. For tee rosettes, this value is 0 degrees.
DAQmx_Val_CartesianStrainX		The tensile strain coplanar to the surface of the material under stress in the X coordinate direction.
DAQmx_Val_CartesianStrainY		The tensile strain coplanar to the surface of the material under stress in the Y coordinate direction.
DAQmx_Val_CartesianShearStrainXY		The strain coplanar to the cross section of the material under stress in the XY coordinate direction.
DAQmx_Val_MaxShearStrain		The maximum strain coplanar to the cross section of the material under stress.
DAQmx_Val_MaxShearStrainAngle		The angle, in degrees, at which the maximum shear strain of the rosette occurs with respect to the preferred X axis. The range is -125 degrees to 225 degrees, where negative values are angles below the X axis. Maximum shear strain angle occurs at an offset of 45 degrees relative to the principal strain angle. For tee rosettes, this value is 45 degrees.

numRosetteMeasTypes	uInt32	Specifies the number of virtual channels used in rosetteMeasTypes.
strainConfig	int32	The strain gage bridge configuration.

	Note Typical rosette sensors use the DAQmx_Val_QuarterBridgeI strain configuration.

Value		Description
DAQmx_Val_FullBridgeI		Four active gages with two pairs subjected to equal and opposite strains.
DAQmx_Val_FullBridgeII		Four active gages with two aligned with maximum principal strain and two Poisson gages in adjacent arms.
DAQmx_Val_FullBridgeIII		Four active gages with two aligned with maximum principal strain and two Poisson gages in opposite arms.
DAQmx_Val_HalfBridgeI		Two active gages with one aligned with maximum principal strain and one Poisson gage.
DAQmx_Val_HalfBridgeII		Two active gages with equal and opposite strains.
DAQmx_Val_QuarterBridgeI		Single active gage.
DAQmx_Val_QuarterBridgeII		Single active gage and one dummy gage.

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
gageFactor	float64	The sensitivity of the strain gages and relates the change in electrical resistance to the change in strain. Each gage in the bridge must have the same gage factor. Refer to the sensor documentation to determine this value.
nominalGageResistance	float64	The resistance, in ohms, of the gages in an unstrained position. Each gage in the bridge must have the same nominal gage resistance. The resistance across arms of the bridge that do not have strain gages must also be the same as the nominal gage resistance. Refer to the sensor documentation to determine this value.
poissonRatio	float64	The ratio of lateral strain to axial strain in the material in which you measure strain.
leadWireResistance	float64	The amount, in ohms, of resistance in the lead wires. Ideally, this value is the same for all leads.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIRTDChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 rtdType, int32 resistanceConfig, int32 currentExcitSource, float64 currentExcitVal, float64 r0);

Creates channel(s) that use an RTD to measure temperature and adds the channel(s) to the task you specify with taskHandle.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Name		Description
DAQmx_Val_DegC		degrees Celsius
DAQmx_Val_DegF		degrees Fahrenheit
DAQmx_Val_Kelvins		kelvins
DAQmx_Val_DegR		degrees Rankine

rtdType	int32	The type of RTD connected to the channel.

Value	Description
DAQmx_Val_Pt3750	Pt3750
DAQmx_Val_Pt3851	Pt3851
DAQmx_Val_Pt3911	Pt3911
DAQmx_Val_Pt3916	Pt3916
DAQmx_Val_Pt3920	Pt3920
DAQmx_Val_Pt3928	Pt3928
DAQmx_Val_Custom	You must specify the 'A', 'B', and 'C' constants for the Callendar-Van Dusen equation

resistanceConfig	int32	The configuration for resistance measurements.

Value		Description
DAQmx_Val_2Wire		2-wire mode.
DAQmx_Val_3Wire		3-wire mode.
DAQmx_Val_4Wire		4-wire mode.

currentExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel. You cannot use this value if the sensor requires excitation.

currentExcitVal	float64	The amount of excitation, in amperes, that the sensor requires.
r0	float64	The sensor resistance in ohms at 0 deg C for the Callendar-Van Dusen equation Refer to the sensor documentation to determine this value.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIStrainGageChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 strainConfig, int32 voltageExcitSource, float64 voltageExcitVal, float64 gageFactor, float64 initialBridgeVoltage, float64 nominalGageResistance, float64 poissonRatio, float64 leadWireResistance, const char customScaleName[]);

Creates channel(s) to measure strain and adds the channel(s) to the task you specify with taskHandle.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Name		Description
DAQmx_Val_Strain		Strain
DAQmx_Val_FromCustomScale		Units specified by a custom scale. Use customScaleName to specify a custom scale.

strainConfig	int32	The strain gage bridge configuration.

Value		Description
DAQmx_Val_FullBridgeI		Four active gages with two pairs subjected to equal and opposite strains.
DAQmx_Val_FullBridgeII		Four active gages with two aligned with maximum principal strain and two Poisson gages in adjacent arms.
DAQmx_Val_FullBridgeIII		Four active gages with two aligned with maximum principal strain and two Poisson gages in opposite arms.
DAQmx_Val_HalfBridgeI		Two active gages with one aligned with maximum principal strain and one Poisson gage.
DAQmx_Val_HalfBridgeII		Two active gages with equal and opposite strains.
DAQmx_Val_QuarterBridgeI		Single active gage.
DAQmx_Val_QuarterBridgeII		Single active gage and one dummy gage.

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
gageFactor	float64	The sensitivity of the strain gages and relates the change in electrical resistance to the change in strain. Each gage in the bridge must have the same gage factor. Refer to the sensor documentation to determine this value.
initialBridgeVoltage	float64	The bridge output voltage in the unloaded condition. NI-DAQmx subtracts this value from any measurements before applying scaling equations. Perform a voltage measurement on the bridge with no strain applied to determine this value.
nominalGageResistance	float64	The resistance, in ohms, of the gages in an unstrained position. Each gage in the bridge must have the same nominal gage resistance. The resistance across arms of the bridge that do not have strain gages must also be the same as the nominal gage resistance. Refer to the sensor documentation to determine this value.
poissonRatio	float64	The ratio of lateral strain to axial strain in the material in which you measure strain.
leadWireResistance	float64	The amount, in ohms, of resistance in the lead wires. Ideally, this value is the same for all leads.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAITempBuiltInSensorChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 units);

Creates channel(s) to measure temperature with a built-in sensor of a terminal block or device and adds the channel(s) to the task you specify with taskHandle. On SCXI modules, for example, this could be the CJC sensor.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
units	int32	The units to use to return the measurement.

Name		Description
DAQmx_Val_DegC		degrees Celsius
DAQmx_Val_DegF		degrees Fahrenheit
DAQmx_Val_Kelvins		kelvins
DAQmx_Val_DegR		degrees Rankine

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIThrmcplChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 thermocoupleType, int32 cjcSource, float64 cjcVal, const char cjcChannel[]);

Creates channel(s) that use a thermocouple to measure temperature and adds the channel(s) to the task you specify with taskHandle.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Name		Description
DAQmx_Val_DegC		degrees Celsius
DAQmx_Val_DegF		degrees Fahrenheit
DAQmx_Val_Kelvins		kelvins
DAQmx_Val_DegR		degrees Rankine

thermocoupleType	int32	The type of thermocouple connected to the channel.

Value		Description
DAQmx_Val_J_Type_TC		J-type thermocouple.
DAQmx_Val_K_Type_TC		K-type thermocouple.
DAQmx_Val_N_Type_TC		N-type thermocouple.
DAQmx_Val_R_Type_TC		R-type thermocouple.
DAQmx_Val_S_Type_TC		S-type thermocouple.
DAQmx_Val_T_Type_TC		T-type thermocouple.
DAQmx_Val_B_Type_TC		B-type thermocouple.
DAQmx_Val_E_Type_TC		E-type thermocouple.

cjcSource	int32	The source of cold junction compensation.

Value		Description
DAQmx_Val_BuiltIn		Use a cold-junction compensation channel built into the terminal block.
DAQmx_Val_ConstVal		You must specify the cold-junction temperature.
DAQmx_Val_Chan		Use a channel for cold-junction compensation.

cjcVal	float64	The temperature of the cold junction of the thermocouple if you set cjcSource to DAQmx_Val_ConstVal.
cjcChannel	const char []	The channel that acquires the temperature of the thermocouple cold-junction if you set cjcSource to DAQmx_Val_Chan. You can use a global channel or another virtual channel already in the task. If the channel is a temperature channel, NI-DAQmx acquires the temperature in the correct units. Other channel types, such as a resistance channel with a custom sensor, must use a custom scale to scale values to degrees Celsius.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIThrmstrChanIex (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 resistanceConfig, int32 currentExcitSource, float64 currentExcitVal, float64 a, float64 b, float64 c);

Creates channel(s) that use a thermistor to measure temperature and adds the channel(s) to the task you specify with taskHandle. Use this function when the thermistor requires current excitation.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Name		Description
DAQmx_Val_DegC		degrees Celsius
DAQmx_Val_DegF		degrees Fahrenheit
DAQmx_Val_Kelvins		kelvins
DAQmx_Val_DegR		degrees Rankine

resistanceConfig	int32	The configuration for resistance measurements.

Value		Description
DAQmx_Val_2Wire		2-wire mode.
DAQmx_Val_3Wire		3-wire mode.
DAQmx_Val_4Wire		4-wire mode.

currentExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel. You cannot use this value if the sensor requires excitation.

currentExcitVal	float64	The amount of excitation, in amperes, that the sensor requires.
a	float64	The A constant from the Steinhart-Hart thermistor equation.
b	float64	The B constant from the Steinhart-Hart thermistor equation.
c	float64	The C constant from the Steinhart-Hart thermistor equation.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIThrmstrChanVex (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 resistanceConfig, int32 voltageExcitSource, float64 voltageExcitVal, float64 a, float64 b, float64 c, float64 r1);

Creates channel(s) that use a thermistor to measure temperature and adds the channel(s) to the task you specify with taskHandle. Use this function when the thermistor requires voltage excitation.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Name		Description
DAQmx_Val_DegC		degrees Celsius
DAQmx_Val_DegF		degrees Fahrenheit
DAQmx_Val_Kelvins		kelvins
DAQmx_Val_DegR		degrees Rankine

resistanceConfig	int32	The configuration for resistance measurements.

Value		Description
DAQmx_Val_2Wire		2-wire mode.
DAQmx_Val_3Wire		3-wire mode.
DAQmx_Val_4Wire		4-wire mode.

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
a	float64	The A constant from the Steinhart-Hart thermistor equation.
b	float64	The B constant from the Steinhart-Hart thermistor equation.
c	float64	The C constant from the Steinhart-Hart thermistor equation.
r1	float64	The value, in ohms, of the reference resistor.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAITorqueBridgePolynomialChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 bridgeConfig, int32 voltageExcitSource, float64 voltageExcitVal, float64 nominalBridgeResistance, const float64 forwardCoeffs[], uInt32 numForwardCoeffs, const float64 reverseCoeffs[], uInt32 numReverseCoeffs, int32 electricalUnits, int32 physicalUnits, const char customScaleName[]);

Creates channel(s) that use a Wheatstone bridge to measure torque.

Use this instance with sensors whose specifications provide a polynomial to convert electrical values to physical values.

When you use this scaling type, NI-DAQmx requires coefficients for a polynomial that converts electrical values to physical values (forward), as well as coefficients for a polynomial that converts physical values to electrical values (reverse). If you only know one set of coefficients, use the DAQmxCalculateReversePolyCoeff function to generate the other set.

Specify different values for units and physicalUnits if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return torque measurements from the channel.

Name		Description
DAQmx_Val_NewtonMeters		newton meters
DAQmx_Val_InchOunces		ounce-inches
DAQmx_Val_InchPounds		pound-inches
DAQmx_Val_FootPounds		pound-feet
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

bridgeConfig	int32	Specifies the Wheatstone bridge configuration connected to the channel.

Value		Description
DAQmx_Val_FullBridge		Four active sensing elements in the bridge
DAQmx_Val_HalfBridge		Two active sensing elements in the bridge
DAQmx_Val_QuarterBridge		One active sensing element in the bridge

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
nominalBridgeResistance	float64	Specifies in ohms the resistance of the bridge while not under load.
forwardCoeffs	const float64 []	An array of coefficients for the polynomial that converts electrical values to physical values. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x^3.
numForwardCoeffs	uInt32	The number of coefficients in the forwardCoeffs array.
reverseCoeffs	const float64 []	An array of coefficients for the polynomial that converts physical values to electrical values. Each element of the array corresponds to a term of the equation. For example, if index three of the array is 9, the fourth term of the equation is 9x^3.
numReverseCoeffs	uInt32	The number of coefficients in the reverseCoeffs array.
electricalUnits	int32	Specifies from which electrical unit to scale data. Select the same unit that the sensor data sheet or calibration certificate uses for electrical values.

Value		Description
DAQmx_Val_VoltsPerVolt		volts per volt
DAQmx_Val_mVoltsPerVolt		millivolts per volt

physicalUnits	int32	Specifies to which physical units to scale electrical data. Select the same unit that the sensor data sheet or calibration certificate uses for physical values.

Value		Description
DAQmx_Val_NewtonMeters		newton meters
DAQmx_Val_InchOunces		ounce-inches
DAQmx_Val_InchPounds		pound-inches
DAQmx_Val_FootPounds		pound-feet

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAITorqueBridgeTableChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 bridgeConfig, int32 voltageExcitSource, float64 voltageExcitVal, float64 nominalBridgeResistance, const float64 electricalVals[], uInt32 numElectricalVals, int32 electricalUnits, const float64 physicalVals[], uInt32 numPhysicalVals, int32 physicalUnits, const char customScaleName[]);

Creates channel(s) that use a Wheatstone bridge to measure torque.

Use this instance with sensors whose specifications provide a table of electrical values and the corresponding physical values.

When you use this scaling type, NI-DAQmx performs linear scaling between each pair of electrical and physical values. The input limits specified with minVal and maxVal must fall within the smallest and largest physical values. For any data outside those endpoints, NI-DAQmx coerces that data to the endpoints.

Specify different values for units and physicalUnits if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return torque measurements from the channel.

Name		Description
DAQmx_Val_NewtonMeters		newton meters
DAQmx_Val_InchOunces		ounce-inches
DAQmx_Val_InchPounds		pound-inches
DAQmx_Val_FootPounds		pound-feet
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

bridgeConfig	int32	Specifies the Wheatstone bridge configuration connected to the channel.

Value		Description
DAQmx_Val_FullBridge		Four active sensing elements in the bridge
DAQmx_Val_HalfBridge		Two active sensing elements in the bridge
DAQmx_Val_QuarterBridge		One active sensing element in the bridge

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
nominalBridgeResistance	float64	Specifies in ohms the resistance of the bridge while not under load.
electricalVals	const float64 []	The array of electrical values that map to the values in physicalVals. Specify this value in the unit indicated by electricalUnits.
numElectricalVals	uInt32	The number of electrical values in the electricalVals array.
electricalUnits	int32	Specifies from which electrical unit to scale data. Select the same unit that the sensor data sheet or calibration certificate uses for electrical values.

Value		Description
DAQmx_Val_VoltsPerVolt		volts per volt
DAQmx_Val_mVoltsPerVolt		millivolts per volt

physicalVals	const float64 []	The array of physical values that map to the values in electricalVals. Specify this value in the unit indicated by physicalUnits.
numPhysicalVals	uInt32	The number of physical values in the physicalVals array.
physicalUnits	int32	Specifies to which physical units to scale electrical data. Select the same unit that the sensor data sheet or calibration certificate uses for physical values.

Value		Description
DAQmx_Val_NewtonMeters		newton meters
DAQmx_Val_InchOunces		ounce-inches
DAQmx_Val_InchPounds		pound-inches
DAQmx_Val_FootPounds		pound-feet

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAITorqueBridgeTwoPointLinChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 bridgeConfig, int32 voltageExcitSource, float64 voltageExcitVal, float64 nominalBridgeResistance, float64 firstElectricalVal, float64 secondElectricalVal, int32 electricalUnits, float64 firstPhysicalVal, float64 secondPhysicalVal, int32 physicalUnits, const char customScaleName[]);

Creates channel(s) that use a Wheatstone bridge to measure torque.

Use this instance with sensors whose specifications do not provide a polynomial for scaling or a table of electrical and physical values.

When you use this scaling type, NI-DAQmx uses two points of electrical and physical values to calculate the slope and y-intercept of a linear equation and uses that equation to scale electrical values to physical values.

Specify different values for units and physicalUnits if the sensor specifications provide physical values in one unit, but you want NI-DAQmx to scale data to a different unit.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return torque measurements from the channel.

Name		Description
DAQmx_Val_NewtonMeters		newton meters
DAQmx_Val_InchOunces		ounce-inches
DAQmx_Val_InchPounds		pound-inches
DAQmx_Val_FootPounds		pound-feet
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

bridgeConfig	int32	Specifies the Wheatstone bridge configuration connected to the channel.

Value		Description
DAQmx_Val_FullBridge		Four active sensing elements in the bridge
DAQmx_Val_HalfBridge		Two active sensing elements in the bridge
DAQmx_Val_QuarterBridge		One active sensing element in the bridge

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
nominalBridgeResistance	float64	Specifies in ohms the resistance of the bridge while not under load.
firstElectricalVal	float64	The first electrical value, corresponding to firstPhysicalVal. Specify this value in the unit indicated by electricalUnits.
secondElectricalVal	float64	The second electrical value, corresponding to secondPhysicalVal. Specify this value in the unit indicated by electricalUnits.
electricalUnits	int32	Specifies from which electrical unit to scale data. Select the same unit that the sensor data sheet or calibration certificate uses for electrical values.

Value		Description
DAQmx_Val_VoltsPerVolt		volts per volt
DAQmx_Val_mVoltsPerVolt		millivolts per volt

firstPhysicalVal	float64	The first physical value, corresponding to firstElectricalVal. Specify this value in the unit indicated by physicalUnits.
secondPhysicalVal	float64	The second physical value, corresponding to secondElectricalValue. Specify this value in the unit indicated by physicalUnits.
physicalUnits	int32	Specifies to which physical units to scale electrical data. Select the same unit that the sensor data sheet or calibration certificate uses for physical values.

Value		Description
DAQmx_Val_NewtonMeters		newton meters
DAQmx_Val_InchOunces		ounce-inches
DAQmx_Val_InchPounds		pound-inches
DAQmx_Val_FootPounds		pound-feet

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIVelocityIEPEChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, float64 minVal, float64 maxVal, int32 units, float64 sensitivity, int32 sensitivityUnits, int32 currentExcitSource, float64 currentExcitVal, const char customScaleName[]);

Creates channel(s) that use an IEPE velocity sensor to measure velocity.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
terminalConfig	int32	The input terminal configuration for the channel.

Value		Description
DAQmx_Val_Cfg_Default		At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE		Referenced single-ended mode
DAQmx_Val_NRSE		Non-referenced single-ended mode
DAQmx_Val_Diff		Differential mode
DAQmx_Val_PseudoDiff		Pseudodifferential mode

minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return velocity measurements from the channel.

Value		Description
DAQmx_Val_MetersPerSecond		Meters per second.
DAQmx_Val_InchesPerSecond		Inches per second.
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

sensitivity	float64	The sensitivity of the sensor. This value is in the units you specify with the sensitivityUnits input. Refer to the sensor documentation to determine this value.
sensitivityUnits	int32	The units of sensitivity.

Name		Description
DAQmx_Val_MillivoltsPerMillimeterPerSecond		mVolts/mm/s.
DAQmx_Val_MilliVoltsPerInchPerSecond		mVolts/in/s.

currentExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel. You cannot use this value if the sensor requires excitation.

currentExcitVal	float64	The amount of excitation, in amperes, that the sensor requires.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIVoltageChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, float64 minVal, float64 maxVal, int32 units, const char customScaleName[]);

Creates channel(s) to measure voltage and adds the channel(s) to the task you specify with taskHandle. If your measurement requires the use of internal excitation or you need the voltage to be scaled by excitation, call DAQmxCreateAIVoltageChanWithExcit.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
terminalConfig	int32	The input terminal configuration for the channel.

Value		Description
DAQmx_Val_Cfg_Default		At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE		Referenced single-ended mode
DAQmx_Val_NRSE		Non-referenced single-ended mode
DAQmx_Val_Diff		Differential mode
DAQmx_Val_PseudoDiff		Pseudodifferential mode

minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the voltage measurements.

Name		Description
DAQmx_Val_Volts		volts
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIVoltageRMSChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, float64 minVal, float64 maxVal, int32 units, const char customScaleName[]);

Creates channel(s) to measure RMS voltage and adds the channel(s) to the task you specify with taskHandle. If your measurement requires the use of internal excitation or you need the voltage to be scaled by excitation, call DAQmxCreateAIVoltageChanWithExcit.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
terminalConfig	int32	The input terminal configuration for the channel.

Value		Description
DAQmx_Val_Cfg_Default		At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE		Referenced single-ended mode
DAQmx_Val_NRSE		Non-referenced single-ended mode
DAQmx_Val_Diff		Differential mode
DAQmx_Val_PseudoDiff		Pseudodifferential mode

minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the voltage measurements.

Name		Description
DAQmx_Val_Volts		volts
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIVoltageChanWithExcit (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, float64 minVal, float64 maxVal, int32 units, int32 bridgeConfig, int32 voltageExcitSource, float64 voltageExcitVal, bool32 useExcitForScaling, const char customScaleName[]);

Creates channel(s) to measure voltage and adds the channels to the task you specify with taskHandle. Use this instance for custom sensors that require excitation. You can choose to use the excitation to scale the measurement.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
terminalConfig	int32	The input terminal configuration for the channel.

Value		Description
DAQmx_Val_Cfg_Default		At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE		Referenced single-ended mode
DAQmx_Val_NRSE		Non-referenced single-ended mode
DAQmx_Val_Diff		Differential mode
DAQmx_Val_PseudoDiff		Pseudodifferential mode

minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the voltage measurements.

Name		Description
DAQmx_Val_Volts		volts
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

bridgeConfig	int32	The type of Wheatstone bridge the sensor is.

Value		Description
DAQmx_Val_FullBridge		Sensor is a full bridge. If you set useExcitForScaling to TRUE, NI-DAQmx divides the measurement by the excitation value. Many sensors scale data to native units using scaling of volts per excitation.
DAQmx_Val_HalfBridge		Sensor is a half bridge. If you set useExcitForScaling to TRUE, NI-DAQmx divides the measurement by the excitation value. Many sensors scale data to native units using scaling of volts per excitation.
DAQmx_Val_QuarterBridge		Sensor is a quarter bridge. If you set useExcitForScaling to TRUE, NI-DAQmx divides the measurement by the excitation value. Many sensors scale data to native units using scaling of volts per excitation.
DAQmx_Val_NoBridge		Sensor is not a Wheatstone bridge.

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
useExcitForScaling	bool32	Specifies whether NI-DAQmx divides the measurement by the excitation. You should typically set useExcitForScaling to TRUE for ratiometric transducers. If you set useExcitForScaling to TRUE, set maxVal and minVal to reflect the scaling. For example, if you expect to acquire a voltage between -5 and 5, and you use an excitation of .10 volts to scale the measurement, set minVal to -50 and set maxVal to 50. If you set bridgeConfig to DAQmx_Val_NoBridge, useExcitForScaling has no effect on the measurement.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIPosEddyCurrProxProbeChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, float64 sensitivity, int32 sensitivityUnits, const char customScaleName[]);

Creates channel(s) that use an [eddy current proximity probe](javascript:LaunchHelp('daqhelp.chm', 'EddyCurrentProximityProbe.html')) to measure linear position and adds the channel(s) to the task you specify with taskHandle.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return linear position measurements from the channel.

Name		Description
DAQmx_Val_Meters		Meters
DAQmx_Val_Inches		Inches
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

sensitivity	float64	The sensitivity of the sensor. This value is in the units you specify with the sensitivityUnits input. Refer to the sensor documentation to determine this value.
sensitivityUnits	int32	The units of sensitivity.

Name		Description
DAQmx_Val_mVoltsPerMil		mVolts/mil
DAQmx_Val_VoltsPerMil		Volts/mil
DAQmx_Val_mVoltsPerMillimeter		mVolts/mMeter
DAQmx_Val_VoltsPerMillimeter		Volts/mMeter
DAQmx_Val_mVoltsPerMicron		mVolts/micron

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIPosLVDTChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, float64 sensitivity, int32 sensitivityUnits, int32 voltageExcitSource, float64 voltageExcitVal, float64 voltageExcitFreq, int32 ACExcitWireMode, const char customScaleName[]);

Creates channel(s) that use an LVDT to measure linear position and adds the channel(s) to the task you specify with taskHandle.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return linear position measurements from the channel.

Name		Description
DAQmx_Val_Meters		Meters
DAQmx_Val_Inches		Inches
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

sensitivity	float64	The sensitivity of the sensor. This value is in the units you specify with the sensitivityUnits input. Refer to the sensor documentation to determine this value.
sensitivityUnits	int32	The units of sensitivity.

Name		Description
DAQmx_Val_mVoltsPerVoltPerMillimeter		mvolts/volt/mmeter
DAQmx_Val_mVoltsPerVoltPerMilliInch		mvolts/volt/0.001 inch

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
voltageExcitFreq	float64	The excitation frequency, in hertz, that the sensor requires. Refer to the sensor documentation to determine this value.
ACExcitWireMode	int32	The number of leads on the sensor. Some sensors may require you to tie leads together to create a 4-wire, 5-wire, or 6-wire sensor. Refer to the documentation for your sensor for more information.

Value		Description
DAQmx_Val_4Wire		4-wire.
DAQmx_Val_5Wire		5-wire.
DAQmx_Val_6Wire		6-wire.

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAIPosRVDTChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, float64 sensitivity, int32 sensitivityUnits, int32 voltageExcitSource, float64 voltageExcitVal, float64 voltageExcitFreq, int32 ACExcitWireMode, const char customScaleName[]);

Creates channel(s) that use an RVDT to measure angular position and adds the channel(s) to the task you specify with taskHandle.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return angular position measurements from the channel.

Name		Description
DAQmx_Val_Degrees		Degrees
DAQmx_Val_Radians		Radians
DAQmx_Val_FromCustomScale		Units specified by a custom scale. Use customScaleName to specify a custom scale.

sensitivity	float64	The sensitivity of the sensor. This value is in the units you specify with the sensitivityUnits input. Refer to the sensor documentation to determine this value.
sensitivityUnits	int32	The units of sensitivity.

Name		Description
DAQmx_Val_mVoltsPerVoltPerDegree		mvolts/volt/degree
DAQmx_Val_mVoltsPerVoltPerRadian		mvolts/volt/radian

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
voltageExcitFreq	float64	The excitation frequency, in hertz, that the sensor requires. Refer to the sensor documentation to determine this value.
ACExcitWireMode	int32	The number of leads on the sensor. Some sensors may require you to tie leads together to create a 4-wire, 5-wire, or 6-wire sensor. Refer to the documentation for your sensor for more information.

Value		Description
DAQmx_Val_4Wire		4-wire.
DAQmx_Val_5Wire		5-wire.
DAQmx_Val_6Wire		6-wire.

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

Obsolete

This function is obsolete. Use DAQmxCreateAITempBuiltInSensorChan instead.

int32 DAQmxCreateTEDSAIAccelChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, float64 minVal, float64 maxVal, int32 units, int32 currentExcitSource, float64 currentExcitVal, const char customScaleName[]);

Creates channel(s) that use an accelerometer to measure acceleration and adds the channel(s) to the task you specify with taskHandle. You must configure the physical channel(s) with TEDS information to use this function.

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
terminalConfig	int32	The input terminal configuration for the channel.

Value		Description
DAQmx_Val_Cfg_Default		At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE		Referenced single-ended mode
DAQmx_Val_NRSE		Non-referenced single-ended mode
DAQmx_Val_Diff		Differential mode
DAQmx_Val_PseudoDiff		Pseudodifferential mode

minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return acceleration measurements from the channel.

Name		Description
DAQmx_Val_AccelUnit_g		G-force (g). 1 g is approximately equal to 9.81 m/s2.
DAQmx_Val_FromCustomScale		Units specified by a custom scale. Use customScaleName to specify a custom scale.

currentExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel. You cannot use this value if the sensor requires excitation.

currentExcitVal	float64	The amount of excitation, in amperes, that the sensor requires.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateTEDSAICurrentChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, float64 minVal, float64 maxVal, int32 units, int32 shuntResistorLoc, float64 externalShuntResistorValue, const char customScaleName[]);

Creates channel(s) to measure current and adds the channel(s) to the task you specify with taskHandle. You must configure the physical channel(s) with TEDS information to use this function.

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
terminalConfig	int32	The input terminal configuration for the channel.

Value		Description
DAQmx_Val_Cfg_Default		At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE		Referenced single-ended mode
DAQmx_Val_NRSE		Non-referenced single-ended mode
DAQmx_Val_Diff		Differential mode
DAQmx_Val_PseudoDiff		Pseudodifferential mode

minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return measurements.

Name		Description
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.
DAQmx_Val_FromTEDS		Units defined by TEDS information associated with the channel.

shuntResistorLoc	int32	The location of the shunt resistor.

Value		Description
DAQmx_Val_Internal		Use the built-in shunt resistor of the device.
DAQmx_Val_External		Use a shunt resistor external to the device. You must specify the value of the shunt resistor in extShuntResistorVal.

extShuntResistorVal	float64	The value, in ohms, of an external shunt resistor.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateTEDSAIBridgeChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 voltageExcitSource, float64 voltageExcitVal, const char customScaleName[]);

Creates a channel that measures voltage ratios from a Wheatstone bridge.

You must configure the physical channel(s) with TEDS information to use this function.

Use this instance with bridge-based sensors that measure phenomena other than strain, force, pressure, or torque, or that scale data to physical units NI-DAQmx does not support.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return measurements from the channel.

Name		Description
DAQmx_Val_FromTEDS		Units defined by TEDS information associated with the channel.
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateTEDSAIForceBridgeChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 voltageExcitSource, float64 voltageExcitVal, const char customScaleName[]);

Creates channel(s) that use a Wheatstone bridge to measure force or load.

You must configure the physical channel(s) with TEDS information to use this function. NI-DAQmx scales electrical values to physical values according to that TEDS information.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return force measurements from the channel.

Name		Description
DAQmx_Val_Newtons		newtons
DAQmx_Val_Pounds		pounds
DAQmx_Val_KilogramForce		kilograms-force
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateTEDSAIForceIEPEChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, float64 minVal, float64 maxVal, int32 units, int32 currentExcitSource, float64 currentExcitVal, const char customScaleName[]);

Creates channel(s) that use an IEPE force sensor to measure force or load. You must configure the physical channel(s) with TEDS information to use this function.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
terminalConfig	int32	The input terminal configuration for the channel.

Value		Description
DAQmx_Val_Cfg_Default		At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE		Referenced single-ended mode
DAQmx_Val_NRSE		Non-referenced single-ended mode
DAQmx_Val_Diff		Differential mode
DAQmx_Val_PseudoDiff		Pseudodifferential mode

minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return force measurements from the channel.

Name		Description
DAQmx_Val_Newtons		newtons
DAQmx_Val_Pounds		pounds
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

currentExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel. You cannot use this value if the sensor requires excitation.

currentExcitVal	float64	The amount of excitation, in amperes, that the sensor requires.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateTEDSAIMicrophoneChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, int32 units, float64 maxSndPressLevel, int32 currentExcitSource, float64 currentExcitVal, const char customScaleName[]);

Creates channel(s) that use a microphone to measure sound pressure and adds the channel(s) to the task you specify with taskHandle. You must configure the physical channel(s) with TEDS information to use this function.

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
terminalConfig	int32	The input terminal configuration for the channel.

Value		Description
DAQmx_Val_Cfg_Default		At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE		Referenced single-ended mode
DAQmx_Val_NRSE		Non-referenced single-ended mode
DAQmx_Val_Diff		Differential mode
DAQmx_Val_PseudoDiff		Pseudodifferential mode

units	int32	The units to use to return sound pressure measurements.

Name		Description
DAQmx_Val_Pascals		pascals
DAQmx_Val_FromCustomScale		Units specified by a custom scale. Use customScaleName to specify a custom scale.

maxSndPressLevel	float64	The maximum instantaneous sound pressure level you expect to measure. This value is in decibels, referenced to 20 micropascals.
currentExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel. You cannot use this value if the sensor requires excitation.

currentExcitVal	float64	The amount of excitation, in amperes, that the sensor requires.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateTEDSAIPressureBridgeChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 voltageExcitSource, float64 voltageExcitVal, const char customScaleName[]);

Creates channel(s) that use a Wheatstone bridge to measure pressure.

You must configure the physical channel(s) with TEDS information to use this function. NI-DAQmx scales electrical values to physical values according to that TEDS information.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return pressure measurements from the channel.

Name		Description
DAQmx_Val_PoundsPerSquareInch		pounds per square inch
DAQmx_Val_Bar		bar
DAQmx_Val_Pascals		pascals
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateTEDSAIResistanceChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 resistanceConfig, int32 currentExcitSource, float64 currentExcitVal, const char customScaleName[]);

Creates channel(s) to measure resistance and adds the channel(s) to the task you specify with taskHandle. You must configure the physical channel(s) with TEDS information to use this function.

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return measurements.

Name		Description
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.
DAQmx_Val_FromTEDS		Units defined by TEDS information associated with the channel.

resistanceConfig	int32	The configuration for resistance measurements.

Value		Description
DAQmx_Val_2Wire		2-wire mode.
DAQmx_Val_3Wire		3-wire mode.
DAQmx_Val_4Wire		4-wire mode.

currentExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel. You cannot use this value if the sensor requires excitation.

currentExcitVal	float64	The amount of excitation, in amperes, that the sensor requires.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateTEDSAIRTDChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 resistanceConfig, int32 currentExcitSource, float64 currentExcitVal);

Creates channel(s) that use an RTD to measure temperature and adds the channel(s) to the task you specify with taskHandle. You must configure the physical channel(s) with TEDS information to use this function.

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Name		Description
DAQmx_Val_DegC		degrees Celsius
DAQmx_Val_DegF		degrees Fahrenheit
DAQmx_Val_Kelvins		kelvins
DAQmx_Val_DegR		degrees Rankine

resistanceConfig	int32	The configuration for resistance measurements.

Value		Description
DAQmx_Val_2Wire		2-wire mode.
DAQmx_Val_3Wire		3-wire mode.
DAQmx_Val_4Wire		4-wire mode.

currentExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel. You cannot use this value if the sensor requires excitation.

currentExcitVal	float64	The amount of excitation, in amperes, that the sensor requires.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateTEDSAIStrainGageChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 voltageExcitSource, float64 voltageExcitVal, float64 initialBridgeVoltage, float64 leadWireResistance, const char customScaleName[]);

Creates channel(s) to measure strain and adds the channel(s) to the task you specify with taskHandle. You must configure the physical channel(s) with TEDS information to use this function.

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Name		Description
DAQmx_Val_Strain		Strain
DAQmx_Val_FromCustomScale		Units specified by a custom scale. Use customScaleName to specify a custom scale.

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
initialBridgeVoltage	float64	The bridge output voltage in the unloaded condition. NI-DAQmx subtracts this value from any measurements before applying scaling equations. Perform a voltage measurement on the bridge with no strain applied to determine this value.
leadWireResistance	float64	The amount, in ohms, of resistance in the lead wires. Ideally, this value is the same for all leads.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateTEDSAIThrmcplChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 cjcSource, float64 cjcVal, const char cjcChannel[]);

Creates channel(s) that use a thermocouple to measure temperature and adds the channel(s) to the task you specify with taskHandle. You must configure the physical channel(s) with TEDS information to use this function.

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Name		Description
DAQmx_Val_DegC		degrees Celsius
DAQmx_Val_DegF		degrees Fahrenheit
DAQmx_Val_Kelvins		kelvins
DAQmx_Val_DegR		degrees Rankine

cjcSource	int32	The source of cold junction compensation.

Value		Description
DAQmx_Val_BuiltIn		Use a cold-junction compensation channel built into the terminal block.
DAQmx_Val_ConstVal		You must specify the cold-junction temperature.
DAQmx_Val_Chan		Use a channel for cold-junction compensation.

cjcVal	float64	The temperature of the cold junction of the thermocouple if you set cjcSource to DAQmx_Val_ConstVal.
cjcChannel	const char []	The channel that acquires the temperature of the thermocouple cold-junction if you set cjcSource to DAQmx_Val_Chan. You can use a global channel or another virtual channel already in the task. If the channel is a temperature channel, NI-DAQmx acquires the temperature in the correct units. Other channel types, such as a resistance channel with a custom sensor, must use a custom scale to scale values to degrees Celsius.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateTEDSAIThrmstrChanIex (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 resistanceConfig, int32 currentExcitSource, float64 currentExcitVal);

Creates channel(s) that use a thermistor to measure temperature and adds the channel(s) to the task you specify with taskHandle. Use this instance when the thermistor requires current excitation. You must configure the physical channel(s) with TEDS information to use this function.

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Name		Description
DAQmx_Val_DegC		degrees Celsius
DAQmx_Val_DegF		degrees Fahrenheit
DAQmx_Val_Kelvins		kelvins
DAQmx_Val_DegR		degrees Rankine

resistanceConfig	int32	The configuration for resistance measurements.

Value		Description
DAQmx_Val_2Wire		2-wire mode.
DAQmx_Val_3Wire		3-wire mode.
DAQmx_Val_4Wire		4-wire mode.

currentExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. You must use currentExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel. You cannot use this value if the sensor requires excitation.

currentExcitVal	float64	The amount of excitation, in amperes, that the sensor requires.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateTEDSAIThrmstrChanVex (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 resistanceConfig, int32 voltageExcitSource, float64 voltageExcitVal, float64 r1);

Creates channel(s) that use a thermistor to measure temperature and adds the channel(s) to the task you specify with taskHandle. Use this instance when the thermistor requires voltage excitation. You must configure the physical channel(s) with TEDS information to use this function.

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Name		Description
DAQmx_Val_DegC		degrees Celsius
DAQmx_Val_DegF		degrees Fahrenheit
DAQmx_Val_Kelvins		kelvins
DAQmx_Val_DegR		degrees Rankine

resistanceConfig	int32	The configuration for resistance measurements.

Value		Description
DAQmx_Val_2Wire		2-wire mode.
DAQmx_Val_3Wire		3-wire mode.
DAQmx_Val_4Wire		4-wire mode.

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
r1	float64	The value, in ohms, of the reference resistor.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateTEDSAITorqueBridgeChan(TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 voltageExcitSource, float64 voltageExcitVal, const char customScaleName[]);

Creates channel(s) that use a Wheatstone bridge to measure torque.

You must configure the physical channel(s) with TEDS information to use this function. NI-DAQmx scales electrical values to physical values according to that TEDS information.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return torque measurements from the channel.

Name		Description
DAQmx_Val_NewtonMeters		newton meters
DAQmx_Val_InchOunces		ounce-inches
DAQmx_Val_InchPounds		pound-inches
DAQmx_Val_FootPounds		pound-feet
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateTEDSAIVoltageChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, float64 minVal, float64 maxVal, int32 units, const char customScaleName[]);

Creates channel(s) to measure voltage and adds the channel(s) to the task you specify with taskHandle. You must configure the physical channel(s) with TEDS information to use this function. If your measurement requires the use of internal excitation or you need the voltage to be scaled by the excitation, use the DAQmxCreateTEDSAIVoltageChanWithExcit function.

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
terminalConfig	int32	The input terminal configuration for the channel.

Value		Description
DAQmx_Val_Cfg_Default		At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE		Referenced single-ended mode
DAQmx_Val_NRSE		Non-referenced single-ended mode
DAQmx_Val_Diff		Differential mode
DAQmx_Val_PseudoDiff		Pseudodifferential mode

minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return measurements.

Name		Description
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.
DAQmx_Val_FromTEDS		Units defined by TEDS information associated with the channel.

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateTEDSAIVoltageChanWithExcit (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 terminalConfig, float64 minVal, float64 maxVal, int32 units, int32 voltageExcitSource, float64 voltageExcitVal, const char customScaleName[]);

Creates channel(s) to measure voltage and adds the channel(s) to the task you specify with taskHandle. Use this instance for custom sensors that require excitation. You can use the excitation to scale the measurement. You must configure the physical channel(s) with TEDS information to use this function.

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
terminalConfig	int32	The input terminal configuration for the channel.

Value		Description
DAQmx_Val_Cfg_Default		At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE		Referenced single-ended mode
DAQmx_Val_NRSE		Non-referenced single-ended mode
DAQmx_Val_Diff		Differential mode
DAQmx_Val_PseudoDiff		Pseudodifferential mode

minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return measurements.

Name		Description
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.
DAQmx_Val_FromTEDS		Units defined by TEDS information associated with the channel.

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateTEDSAIPosLVDTChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 voltageExcitSource, float64 voltageExcitVal, float64 voltageExcitFreq, int32 ACExcitWireMode, const char customScaleName[]);

Creates channel(s) that use an LVDT to measure linear position and adds the channel(s) to the task you specify with taskHandle. You must configure the physical channel(s) with TEDS information to use this function.

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return linear position measurements from the channel.

Name		Description
DAQmx_Val_Meters		Meters
DAQmx_Val_Inches		Inches
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
voltageExcitFreq	float64	The excitation frequency, in hertz, that the sensor requires. Refer to the sensor documentation to determine this value.
ACExcitWireMode	int32	The number of leads on the sensor. Some sensors may require you to tie leads together to create a 4-wire, 5-wire, or 6-wire sensor. Refer to the documentation for your sensor for more information.

Value		Description
DAQmx_Val_4Wire		4-wire.
DAQmx_Val_5Wire		5-wire.
DAQmx_Val_6Wire		6-wire.

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateTEDSAIPosRVDTChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 voltageExcitSource, float64 voltageExcitVal, float64 voltageExcitFreq, int32 ACExcitWireMode, const char customScaleName[]);

Creates channel(s) that use an RVDT to measure angular position and adds the channel(s) to the task you specify with taskHandle. You must configure the physical channel(s) with TEDS information to use this function.

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return angular position measurements from the channel.

Name		Description
DAQmx_Val_Degrees		Degrees
DAQmx_Val_Radians		Radians
DAQmx_Val_FromCustomScale		Units specified by a custom scale. Use customScaleName to specify a custom scale.

voltageExcitSource	int32	The source of excitation.

Value		Description
DAQmx_Val_Internal		Use the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_External		Use an excitation source other than the built-in excitation source of the device. If you select this value, you must use voltageExcitVal to specify the amount of excitation.
DAQmx_Val_None		Supply no excitation to the channel.

voltageExcitVal	float64	Specifies in volts the amount of excitation supplied to the sensor. Refer to the sensor documentation to determine appropriate excitation values.
voltageExcitFreq	float64	The excitation frequency, in hertz, that the sensor requires. Refer to the sensor documentation to determine this value.
ACExcitWireMode	int32	The number of leads on the sensor. Some sensors may require you to tie leads together to create a 4-wire, 5-wire, or 6-wire sensor. Refer to the documentation for your sensor for more information.

Value		Description
DAQmx_Val_4Wire		4-wire.
DAQmx_Val_5Wire		5-wire.
DAQmx_Val_6Wire		6-wire.

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAOCurrentChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, const char customScaleName[]);

Creates channel(s) to generate current and adds the channel(s) to the task you specify with taskHandle.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to generate.
maxVal	float64	The maximum value, in units, that you expect to generate.
units	int32	The units in which to generate current.

Value		Description
DAQmx_Val_Amps		amperes
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAOFuncGenChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], int32 type, float64 frequency, float64 amplitude, float64 offset);

Creates a channel for continually generating a waveform on the selected physical channel.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
type	int32	Specifies the kind of waveform to generate.

Value		Description
DAQmx_Val_Sine		Sine wave
DAQmx_Val_Triangle		Triangle wave
DAQmx_Val_Square		Sawtooth wave
DAQmx_Val_Sawtooth		Square wave

frequency	float64	The frequency of the waveform to generate in hertz.
amplitude	float64	The zero-to-peak amplitude of the waveform to generate in volts. Zero and negative values are valid.
offset	float64	The voltage offset of the waveform to generate.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateAOVoltageChan (TaskHandle taskHandle, const char physicalChannel[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, const char customScaleName[]);

Creates channel(s) to generate voltage and adds the channel(s) to the task you specify with taskHandle.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
physicalChannel	const char []	The names of the physical channels to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to generate.
maxVal	float64	The maximum value, in units, that you expect to generate.
units	int32	The units in which to generate voltage.

Name		Description
DAQmx_Val_Volts		volts
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateDIChan (TaskHandle taskHandle, const char lines[], const char nameToAssignToLines[], int32 lineGrouping);

Creates channel(s) to measure digital signals and adds the channel(s) to the task you specify with taskHandle. You can group digital lines into one digital channel or separate them into multiple digital channels. If you specify one or more entire ports in lines by using port physical channel names, you cannot separate the ports into multiple channels. To separate ports into multiple channels, use this function multiple times with a different port each time.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
lines	const char []	The names of the digital lines used to create a virtual channel. You can specify a list or range of lines. Specifying a port and no lines is the equivalent of specifying all the lines of that port in order. Therefore, if you specify Dev1/port0 and port 0 has eight lines, this is expanded to Dev1/port0/line0:7.
nameToAssignToLines	const char []	The name of the created virtual channel(s). If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToLines, you must use the names when you refer to these channels in other NI-DAQmx functions.
lineGrouping	int32	Specifies whether to group digital lines into one or more virtual channels. If you specify one or more entire ports in lines, you must set lineGrouping to DAQmx_Val_ChanForAllLines.

Value		Description
DAQmx_Val_ChanPerLine		One channel for each line
DAQmx_Val_ChanForAllLines		One channel for all lines

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateDOChan (TaskHandle taskHandle, const char lines[], const char nameToAssignToLines[], int32 lineGrouping);

Creates channel(s) to generate digital signals and adds the channel(s) to the task you specify with taskHandle. You can group digital lines into one digital channel or separate them into multiple digital channels. If you specify one or more entire ports in lines by using port physical channel names, you cannot separate the ports into multiple channels. To separate ports into multiple channels, use this function multiple times with a different port each time.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
lines	const char []	The names of the digital lines used to create a virtual channel. You can specify a list or range of lines. Specifying a port and no lines is the equivalent of specifying all the lines of that port in order. Therefore, if you specify Dev1/port0 and port 0 has eight lines, this is expanded to Dev1/port0/line0:7.
nameToAssignToLines	const char []	The name of the created virtual channel(s). If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToLines, you must use the names when you refer to these channels in other NI-DAQmx functions.
lineGrouping	int32	Specifies whether to group digital lines into one or more virtual channels. If you specify one or more entire ports in lines, you must set lineGrouping to DAQmx_Val_ChanForAllLines.

Value		Description
DAQmx_Val_ChanPerLine		One channel for each line
DAQmx_Val_ChanForAllLines		One channel for all lines

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateCIAngVelocityChan (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 decodingType, int32 units, uInt32 pulsesPerRev, const char customScaleName[]);

Creates a channel to measure angular velocity. With the exception of devices that support multi-counter tasks, you can create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signal to the default input terminal of the counter unless you select a different input terminal.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
decodingType	int32	Specifies how to count and interpret the pulses that the encoder generates on signal A and signal B. DAQmx_Val_X1, DAQmx_Val_X2, and DAQmx_Val_X4 are valid for quadrature encoders only. DAQmx_Val_TwoPulseCounting is valid only for two-pulse encoders. DAQmx_Val_X2 and DAQmx_Val_X4 decoding are more sensitive to smaller changes in position than DAQmx_Val_X1 encoding, with DAQmx_Val_X4 being the most sensitive. However, more sensitive decoding is more likely to produce erroneous measurements if there is vibration in the encoder or other noise in the signals.

Value		Description
DAQmx_Val_X1		If signal A leads signal B, count the rising edges of signal A. If signal B leads signal A, count the falling edges of signal A.
DAQmx_Val_X2		Count the rising and falling edges of signal A.
DAQmx_Val_X4		Count the rising and falling edges of both signal A and signal B.
DAQmx_Val_TwoPulseCounting		Increment the count on rising edges of signal A. Decrement the count on rising pulses of signal B.

minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return velocity measurements from the channel.

Value		Description
DAQmx_Val_RPM		Revolutions per minute.
DAQmx_Val_RadiansPerSecond		Radians per second.
DAQmx_Val_DegreesPerSecond		Degrees per second.
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

pulsesPerRev	uInt32	The number of pulses the encoder generates per revolution. This value is the number of pulses on either signal A or signal B, not the total number of pulses on both signal A and signal B.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateCICountEdgesChan (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], int32 edge, uInt32 initialCount, int32 countDirection);

Creates a channel to count the number of rising or falling edges of a digital signal and adds the channel to the task you specify with taskHandle. With the exception of devices that support multi-counter tasks, you can create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signal to the default input terminal of the counter unless you select a different input terminal.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
edge	int32	Specifies on which edges of the input signal to increment or decrement the count.

Value		Description
DAQmx_Val_Rising		Rising edge(s).
DAQmx_Val_Falling		Falling edge(s).

initialCount	uInt32	The value from which to start counting.
countDirection	int32	Specifies whether to increment or decrement the counter on each edge.

Value		Description
DAQmx_Val_CountUp		Increment the count register on each edge.
DAQmx_Val_CountDown		Decrement the count register on each edge.
DAQmx_Val_ExtControlled		The state of a digital line controls the count direction. Each counter has a default count direction terminal.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateCIDutyCycleChan (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], float64 minFreq, float64 maxFreq, int32 edge, const char customScaleName[]);

Creates channel(s) to duty cycle of a digital pulse. Connect the input signal to the default input terminal of the counter unless you select a different input terminal. With the exception of devices that support multi-counter tasks, you can create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
maxFreq	float64	The maximum frequency you expect to measure.
minFreq	float64	The minimum frequency you expect to measure.
edge	int32	Specifies between which edges to measure the frequency or period of the signal.

Value		Description
DAQmx_Val_Falling		Measure between falling edges.
DAQmx_Val_Rising		Measure between rising edges.

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateCIFreqChan (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 edge, int32 measMethod, float64 measTime, uInt32 divisor, const char customScaleName[]);

Creates a channel to measure the frequency of a digital signal and adds the channel to the task you specify with taskHandle. With the exception of devices that support multi-counter tasks, you can create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signal to the default input terminal of the counter unless you select a different input terminal.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Name		Description
DAQmx_Val_Hz		hertz
DAQmx_Val_Ticks		Timebase ticks
DAQmx_Val_FromCustomScale		Units by a custom scale. Use customScaleName to specify a custom scale.

edge	int32	Specifies between which edges to measure the frequency or period of the signal.

Value		Description
DAQmx_Val_Rising		Rising edge(s).
DAQmx_Val_Falling		Falling edge(s).

measMethod	int32	The method used to calculate the period or frequency of the signal.

Value		Description
DAQmx_Val_LowFreq1Ctr		Use one counter that uses a constant timebase to measure the input signal.
DAQmx_Val_HighFreq2Ctr		Use two counters, one of which counts pulses of the signal to measure during the specified measurement time.
DAQmx_Val_LargeRng2Ctr		Use one counter to divide the frequency of the input signal to create a lower-frequency signal that the second counter can more easily measure.

	Caution Refer to [Quantization Error](javascript:LaunchHelp('daqhelp.chm', 'QuantError.html')) in the NI-DAQmx Help to choose a measurement method that will limit error in the frequency measurement.

measTime	float64	The length of time to measure the frequency or period of a digital signal, when measMethod is DAQmx_Val_HighFreq2Ctr. Measurement accuracy increases with increased measurement time and with increased signal frequency.

	Caution If you measure a high-frequency signal for too long a time, the count register could roll over, resulting in an incorrect measurement.

divisor	uInt32	The value by which to divide the input signal, when measMethod is DAQmx_Val_LargeRng2Ctr. The larger this value, the more accurate the measurement, but too large a value can cause the count register to roll over, resulting in an incorrect measurement.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateCILinVelocityChan (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 decodingType, int32 units, float64 distPerPulse, const char customScaleName[]);

Creates a channel that uses a linear encoder to measure linear velocity. With the exception of devices that support multi-counter tasks, you can create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signal to the default input terminal of the counter unless you select a different input terminal.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
decodingType	int32	Specifies how to count and interpret the pulses that the encoder generates on signal A and signal B. DAQmx_Val_X1, DAQmx_Val_X2, and DAQmx_Val_X4 are valid for quadrature encoders only. DAQmx_Val_TwoPulseCounting is valid only for two-pulse encoders. DAQmx_Val_X2 and DAQmx_Val_X4 decoding are more sensitive to smaller changes in position than DAQmx_Val_X1 encoding, with DAQmx_Val_X4 being the most sensitive. However, more sensitive decoding is more likely to produce erroneous measurements if there is vibration in the encoder or other noise in the signals.

Value		Description
DAQmx_Val_X1		If signal A leads signal B, count the rising edges of signal A. If signal B leads signal A, count the falling edges of signal A.
DAQmx_Val_X2		Count the rising and falling edges of signal A.
DAQmx_Val_X4		Count the rising and falling edges of both signal A and signal B.
DAQmx_Val_TwoPulseCounting		Increment the count on rising edges of signal A. Decrement the count on rising pulses of signal B.

minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	Specifies in which unit to return velocity measurements from the channel.

Value		Description
DAQmx_Val_MetersPerSecond		Meters per second.
DAQmx_Val_InchesPerSecond		Inches per second.
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

distPerPulse	float64	The distance to measure for each pulse the encoder generates on signal A or signal B. This value is in the units specified with the units input.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateCIPeriodChan (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 edge, int32 measMethod, float64 measTime, uInt32 divisor, const char customScaleName[]);

Creates a channel to measure the period of a digital signal and adds the channel to the task you specify with taskHandle. With the exception of devices that support multi-counter tasks, you can create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signal to the default input terminal of the counter unless you select a different input terminal.

	Note When measMethod is set to DAQmx_Val_LowFreq1Ctr, you must pass the values 0.000001 for measTime and 4 for divisor. These values will be ignored by the function, but if they are not passed, the function returns an error.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Value		Description
DAQmx_Val_Seconds		seconds
DAQmx_Val_Ticks		Timebase ticks
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

edge	int32	Specifies between which edges to measure the frequency or period of the signal.

Value		Description
DAQmx_Val_Rising		Rising edge(s).
DAQmx_Val_Falling		Falling edge(s).

measMethod	int32	Specifies the method used to calculate the frequency or period of the signal.

Value		Description
DAQmx_Val_LowFreq1Ctr		Use one counter that uses a constant timebase to measure the input signal.
DAQmx_Val_HighFreq2Ctr		Use two counters, one of which counts pulses of the signal to measure during the specified measurement time.
DAQmx_Val_LargeRng2Ctr		Use one counter to divide the frequency of the input signal to create a lower-frequency signal that the second counter can more easily measure.

measTime	float64	The length of time to measure the frequency or period of a digital signal, when measMethod is DAQmx_Val_HighFreq2Ctr. Measurement accuracy increases with increased measurement time and with increased signal frequency.

	Caution If you measure a high-frequency signal for too long a time, the count register could roll over, resulting in an incorrect measurement.

divisor	uInt32	The value by which to divide the input signal, when measMethod is DAQmx_Val_LargeRng2Ctr. The larger this value, the more accurate the measurement, but too large a value can cause the count register to roll over, resulting in an incorrect measurement.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateCIPulseChanFreq (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units);

Creates a channel to measure pulse specifications, returning the measurements as pairs of frequency and duty cycle, and adds the channel to the task you specify with taskHandle. With the exception of devices that support multi-counter tasks, you can create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signal to the default input terminal of the counter unless you select a different input terminal.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Value		Description
DAQmx_Val_Hz		hertz

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateCIPulseChanTicks (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], const char sourceTerminal[], float64 minVal, float64 maxVal);

Creates a channel to measure pulse specifications, returning the measurements as pairs of high ticks and low ticks, and adds the channel to the task you specify with taskHandle. With the exception of devices that support multi-counter tasks, you can create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signal to the default input terminal of the counter unless you select a different input terminal.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
sourceTerminal	const char []	The originating terminal of the route. You can specify a terminal name.
minVal	float64	The minimum value that you expect to measure.
maxVal	float64	The maximum value that you expect to measure.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateCIPulseChanTime (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units);

Creates a channel to measure pulse specifications, returning the measurements as pairs of high time and low time, and adds the channel to the task you specify with taskHandle. With the exception of devices that support multi-counter tasks, you can create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signal to the default input terminal of the counter unless you select a different input terminal.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Value		Description
DAQmx_Val_Seconds		seconds

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateCIPulseWidthChan (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 startingEdge, const char customScaleName[]);

Creates a channel to measure the width of a digital pulse and adds the channel to the task you specify with taskHandle. startingEdge determines whether to measure a high pulse or a low pulse. With the exception of devices that support multi-counter tasks, you can create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signal to the default input terminal of the counter unless you select a different input terminal.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Value		Description
DAQmx_Val_Seconds		seconds
DAQmx_Val_Ticks		Timebase ticks
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

startingEdge	int32	Specifies on which edge to begin measuring pulse width.

Value		Description
DAQmx_Val_Rising		Rising edge(s).
DAQmx_Val_Falling		Falling edge(s).

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateCISemiPeriodChan (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, const char customScaleName[]);

Creates a channel to measure the time between state transitions of a digital signal and adds the channel to the task you specify with taskHandle. With the exception of devices that support multi-counter tasks, you can create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signal to the default input terminal of the counter unless you select a different input terminal.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Value		Description
DAQmx_Val_Seconds		seconds
DAQmx_Val_Ticks		Timebase ticks
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

DAQmxCreateCITwoEdgeSepChan (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], float64 minVal, float64 maxVal, int32 units, int32 firstEdge, int32 secondEdge, const char customScaleName[]);

Creates a channel that measures the amount of time between the rising or falling edge of one digital signal and the rising or falling edge of another digital signal. With the exception of devices that support multi-counter tasks, you can create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signals to the default input terminals of the counter unless you select different input terminals.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels.
nameToAssignToChannel	const char []	The name to assign to the created virtual channel. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
minVal	float64	The minimum value, in units, that you expect to measure.
maxVal	float64	The maximum value, in units, that you expect to measure.
units	int32	The units to use to return the measurement.

Value		Description
DAQmx_Val_Seconds		seconds
DAQmx_Val_Ticks		Timebase ticks
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

firstEdge	int32	Specifies on which edge of the first signal to start each measurement.

Name		Description
DAQmx_Val_Rising		Start each measurement on the rising edge of the first signal.
DAQmx_Val_Falling		Start each measurement on the falling edge of the first signal.

secondEdge	int32	Specifies on which edge of the first signal to stop each measurement.

Name		Description
DAQmx_Val_Rising		Stop each measurement on the rising edge of the second signal.
DAQmx_Val_Falling		Stop each measurement on the falling edge of the second signal.

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateCILinEncoderChan (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], int32 decodingType, bool32 ZidxEnable, float64 ZidxVal, int32 ZidxPhase, int32 units, float64 distPerPulse, float64 initialPos, const char customScaleName[]);

Creates a channel that uses a linear encoder to measure linear position. With the exception of devices that support multi-counter tasks, you can create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signals to the default input terminals of the counter unless you select different input terminals.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels.
nameToAssignToChannel	const char []	The name to assign to the created virtual channel. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
decodingType	int32	Specifies how to count and interpret the pulses that the encoder generates on signal A and signal B. DAQmx_Val_X1, DAQmx_Val_X2, and DAQmx_Val_X4 are valid for quadrature encoders only. DAQmx_Val_TwoPulseCounting is valid only for two-pulse encoders. DAQmx_Val_X2 and DAQmx_Val_X4 decoding are more sensitive to smaller changes in position than DAQmx_Val_X1 encoding, with DAQmx_Val_X4 being the most sensitive. However, more sensitive decoding is more likely to produce erroneous measurements if there is vibration in the encoder or other noise in the signals.

Value		Description
DAQmx_Val_X1		If signal A leads signal B, count the rising edges of signal A. If signal B leads signal A, count the falling edges of signal A.
DAQmx_Val_X2		Count the rising and falling edges of signal A.
DAQmx_Val_X4		Count the rising and falling edges of both signal A and signal B.
DAQmx_Val_TwoPulseCounting		Increment the count on rising edges of signal A. Decrement the count on rising pulses of signal B.

ZidxEnable	bool32	Specifies whether to enable z indexing for the measurement.
ZidxVal	float64	The value, in units, to which to reset the measurement when signal Z is high and signal A and signal B are at the states you specify with ZidxPhase.
ZidxPhase	int32	The states at which signal A and signal B must be while signal Z is high for NI-DAQmx to reset the measurement. If signal Z is never high while the signal A and signal B are high, for example, you must choose a phase other than DAQmx_Val_AHighBHigh. When signal Z goes high and how long it stays high varies from encoder to encoder. Refer to the documentation for the encoder to determine the timing of signal Z with respect to signal A and signal B.

Value		Description
DAQmx_Val_AHighBHigh		Reset the measurement when both signal A and signal B are at high logic.
DAQmx_Val_AHighBLow		Reset the measurement when signal A is at high logic and signal B is at low logic.
DAQmx_Val_ALowBHigh		Reset the measurement when signal A is at low logic and signal B is at high logic.
DAQmx_Val_ALowBLow		Reset the measurement when both signal A and signal B are at low logic.

units	int32	The units to use to return linear position measurements from the channel.

Name		Description
DAQmx_Val_Meters		Meters.
DAQmx_Val_Inches		Inches.
DAQmx_Val_Ticks		Timebase Ticks.
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

distPerPulse	float64	The distance measured for each pulse the encoder generates. Specify this value in units.
initialPos	float64	The position of the encoder when the measurement begins. This value is in units.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateCIAngEncoderChan (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], int32 decodingType, bool32 ZidxEnable, float64 ZidxVal, int32 ZidxPhase, int32 units, uInt32 pulsesPerRev, float64 initialAngle, const char customScaleName[]);

Creates a channel that uses an angular encoder to measure angular position. With the exception of devices that support multi-counter tasks, you can create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signals to the default input terminals of the counter unless you select different input terminals.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels.
nameToAssignToChannel	const char []	The name to assign to the created virtual channel. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
decodingType	int32	Specifies how to count and interpret the pulses that the encoder generates on signal A and signal B. DAQmx_Val_X1, DAQmx_Val_X2, and DAQmx_Val_X4 are valid for quadrature encoders only. DAQmx_Val_TwoPulseCounting is valid only for two-pulse encoders. DAQmx_Val_X2 and DAQmx_Val_X4 decoding are more sensitive to smaller changes in position than DAQmx_Val_X1 encoding, with DAQmx_Val_X4 being the most sensitive. However, more sensitive decoding is more likely to produce erroneous measurements if there is vibration in the encoder or other noise in the signals.

Value		Description
DAQmx_Val_X1		If signal A leads signal B, count the rising edges of signal A. If signal B leads signal A, count the falling edges of signal A.
DAQmx_Val_X2		Count the rising and falling edges of signal A.
DAQmx_Val_X4		Count the rising and falling edges of both signal A and signal B.
DAQmx_Val_TwoPulseCounting		Increment the count on rising edges of signal A. Decrement the count on rising pulses of signal B.

ZidxEnable	bool32	Specifies whether to enable z indexing for the measurement.
ZidxVal	float64	The value, in units, to which to reset the measurement when signal Z is high and signal A and signal B are at the states you specify with ZidxPhase.
ZidxPhase	int32	The states at which signal A and signal B must be while signal Z is high for NI-DAQmx to reset the measurement. If signal Z is never high while the signal A and signal B are high, for example, you must choose a phase other than DAQmx_Val_AHighBHigh. When signal Z goes high and how long it stays high varies from encoder to encoder. Refer to the documentation for the encoder to determine the timing of signal Z with respect to signal A and signal B.

Value		Description
DAQmx_Val_AHighBHigh		Reset the measurement when both signal A and signal B are at high logic.
DAQmx_Val_AHighBLow		Reset the measurement when signal A is at high logic and signal B is at low logic.
DAQmx_Val_ALowBHigh		Reset the measurement when signal A is at low logic and signal B is at high logic.
DAQmx_Val_ALowBLow		Reset the measurement when both signal A and signal B are at low logic.

units	int32	The units to use to return angular position measurements from the channel.

Value		Description
DAQmx_Val_Degrees		Degrees
DAQmx_Val_Radians		Radians
DAQmx_Val_Ticks		Timebase ticks
DAQmx_Val_FromCustomScale		Units a custom scale specifies. Use customScaleName to specify a custom scale.

pulsesPerRev	uInt32	The number of pulses the encoder generates per revolution. This value is the number of pulses on one of either A signal or B signal, not the total number of pulses on both signal A and signal B.
initialAngle	float64	The starting angle of the encoder when the measurement begins. Specify this value in units.
customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateCIGPSTimestampChan (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], int32 units, int32 gpsSyncMethod, const char custScaleName[]);

Creates a channel that uses a special-purpose counter to take a timestamp and synchronizes that counter to a GPS receiver. With the exception of devices that support multi-counter tasks, you can create only one counter input channel at a time with this function because a task can contain only one counter input channel. To read from multiple counters simultaneously, use a separate task for each counter. Connect the input signal to the default input terminal of the counter unless you select a different input terminal.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
units	int32	The units to use to return the timestamp.

Value		Description
DAQmx_Val_Seconds		Seconds
DAQmx_Val_FromCustomScale		From custom scale

gpsSyncMethod	int32	The method to use to synchronize the counter to a GPS receiver.

Value		Description
DAQmx_Val_IRIGB		IRIG-B
DAQmx_Val_PPS		PPS
DAQmx_Val_None		None

customScaleName	const char []	The name of a custom scale to apply to the channel. To use this parameter, you must set units to DAQmx_Val_FromCustomScale. If you do not set units to DAQmx_Val_FromCustomScale, you must set customScaleName to NULL.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateCOPulseChanFreq (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], int32 units, int32 idleState, float64 initialDelay, float64 freq, float64 dutyCycle);

Creates channel(s) to generate digital pulses that freq and dutyCycle define and adds the channel to the task you specify with taskHandle. The pulses appear on the default output terminal of the counter unless you select a different output terminal.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
units	int32	The units in which to specify freq.

Name		Description
DAQmx_Val_Hz		hertz

idleState	int32	The resting state of the output terminal.

Value		Description
DAQmx_Val_High		High state.
DAQmx_Val_Low		Low state.

initialDelay	float64	The amount of time in seconds to wait before generating the first pulse.
freq	float64	The frequency at which to generate pulses.
dutyCycle	float64	The width of the pulse divided by the pulse period. NI-DAQmx uses this ratio, combined with frequency, to determine pulse width and the interval between pulses.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateCOPulseChanTicks (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], const char sourceTerminal[], int32 idleState, int32 initialDelay, int32 lowTicks, int32 highTicks);

Creates channel(s) to generate digital pulses defined by the number of timebase ticks that the pulse is at a high state and the number of timebase ticks that the pulse is at a low state and also adds the channel to the task you specify with taskHandle. The pulses appear on the default output terminal of the counter unless you select a different output terminal.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
sourceTerminal	const char []	The terminal to which you connect an external timebase. You also can specify a source terminal by using a terminal name.
idleState	int32	The resting state of the output terminal.

Value		Description
DAQmx_Val_High		High state.
DAQmx_Val_Low		Low state.

initialDelay	int32	The number of timebase ticks to wait before generating the first pulse.
lowTicks	int32	The number of timebase ticks that the pulse is low.
highTicks	int32	The number of timebase ticks that the pulse is high.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

int32 DAQmxCreateCOPulseChanTime (TaskHandle taskHandle, const char counter[], const char nameToAssignToChannel[], int32 units, int32 idleState, float64 initialDelay, float64 lowTime, float64 highTime);

Creates channel(s) to generate digital pulses defined by the amount of time the pulse is at a high state and the amount of time the pulse is at a low state and adds the channel to the task you specify with taskHandle. The pulses appear on the default output terminal of the counter unless you select a different output terminal.

Input
Name	Type	Description
taskHandle	TaskHandle	The task to which to add the channels that this function creates.
counter	const char []	The name of the counter to use to create virtual channels. You can specify a list or range of physical channels.
nameToAssignToChannel	const char []	The name(s) to assign to the created virtual channel(s). If you do not specify a name, NI-DAQmx uses the physical channel name as the virtual channel name. If you specify your own names for nameToAssignToChannel, you must use the names when you refer to these channels in other NI-DAQmx functions. If you create multiple virtual channels with one call to this function, you can specify a list of names separated by commas. If you provide fewer names than the number of virtual channels you create, NI-DAQmx automatically assigns names to the virtual channels.
units	int32	The units in which to define pulse high and low time.

Value		Description
DAQmx_Val_Seconds		Seconds

idleState	int32	The resting state of the output terminal.

Value		Description
DAQmx_Val_High		High state.
DAQmx_Val_Low		Low state.

initialDelay	float64	The amount of time in seconds to wait before generating the first pulse.
lowTime	float64	The amount of time the pulse is low, in seconds.
highTime	float64	The amount of time the pulse is high, in seconds.

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.