DAQmxCreateAICurrentChan
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[]);
Purpose
Creates channel(s) for current measurement and adds the
channel(s) to the task you specify with taskHandle.
Parameters
|
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.
|
|
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. |
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. |