DAQmxCreateTEDSAIVoltageChanWithExcit

NI-DAQmx C Functions

DAQmxCreateTEDSAIVoltageChanWithExcit

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[]);

Purpose

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.

Parameters

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 (-1) At run time, NI-DAQmx chooses the default terminal configuration for the channel.
DAQmx_Val_RSE Referenced single-ended mode
DAQmx_Val_NRSE Nonreferenced 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. 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. You must use voltageExcitVal 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.
voltageExcitVal float64 The amount of excitation, in volts, 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.

Return 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.