AOChannelCollection.CreateCurrentChannel Method (String, String, Double, Double, AOCurrentUnits)
- Updated2023-02-21
- 2 minute(s) read
AOChannelCollectionCreateCurrentChannel Method (String, String, Double, Double, AOCurrentUnits)
Namespace: NationalInstruments.DAQmx
Assembly: NationalInstruments.DAQmx (in NationalInstruments.DAQmx.dll) Version: 20.7.40.49302
Syntax
public AOChannel CreateCurrentChannel( string physicalChannelName, string nameToAssignChannel, double minimumValue, double maximumValue, AOCurrentUnits units )
Public Function CreateCurrentChannel ( physicalChannelName As String, nameToAssignChannel As String, minimumValue As Double, maximumValue As Double, units As AOCurrentUnits ) As AOChannel
Parameters
- physicalChannelName
- Type: SystemString
The names of one or more physical channels to use to create one or more local virtual channels. - nameToAssignChannel
- Type: SystemString
One or more names to assign to the created local virtual channels. To use the physical channel name as the local virtual channel name, set this value to Empty. - minimumValue
- Type: SystemDouble
The minimum value to generate, in units. - maximumValue
- Type: SystemDouble
The maximum value to generate, in units. - units
- Type: NationalInstruments.DAQmxAOCurrentUnits
The units to use to generate current.
Return Value
Type: AOChannelThe newly created AOChannel.
Exceptions
| Exception | Condition |
|---|---|
| DaqException | The NI-DAQmx driver returned an error. |
Remarks
This method creates a local virtual channel for every physical channel name you specify. If you create multiple local virtual channels with one call to this method, you can specify a comma-delimited list of names for nameToAssignChannel. If you provide fewer local virtual channel names in nameToAssignChannel than you create, NI-DAQmx automatically assigns names to the local virtual channels.
If you do not provide a value for nameToAssignChannel, NI-DAQmx uses the physicalChannelName as the local virtual channel name. If you use nameToAssignChannel to create a name for the local virtual channel, you must use this name in other properties and methods.
The NI-DAQmx driver does not determine if the requested settings are possible until the task is verified. CreateCurrentChannel(String, String, Double, Double, AOCurrentUnits) does not throw an exception for parameter values that are not compatible with your hardware or other settings in your task. To determine if all of the settings for a Task are valid, you must verify the task by starting the task, either with Start or by reading from or writing to the task, or by calling Control(TaskAction) with Verify.