CIChannelCollection.CreatePulseWidthChannel Method (String, String, Double, Double, CIPulseWidthStartingEdge, String)
- Updated2023-02-21
- 2 minute(s) read
CIChannelCollectionCreatePulseWidthChannel Method (String, String, Double, Double, CIPulseWidthStartingEdge, String)
Namespace: NationalInstruments.DAQmx
Assembly: NationalInstruments.DAQmx (in NationalInstruments.DAQmx.dll) Version: 20.7.40.49302
Syntax
public CIChannel CreatePulseWidthChannel( string counter, string nameToAssignChannel, double minimumValue, double maximumValue, CIPulseWidthStartingEdge edge, string customScaleName )
Public Function CreatePulseWidthChannel ( counter As String, nameToAssignChannel As String, minimumValue As Double, maximumValue As Double, edge As CIPulseWidthStartingEdge, customScaleName As String ) As CIChannel
Parameters
- counter
- Type: SystemString
The names of the counters to use to create the virtual channel. - nameToAssignChannel
- Type: SystemString
The name to assign to the created channel. To use the physical channel name as the local virtual channel name, set this value to Empty. - minimumValue
- Type: SystemDouble
The minimum value expected from the measurement, in units. - maximumValue
- Type: SystemDouble
The maximum value expected from the measurement, in units. - edge
- Type: NationalInstruments.DAQmxCIPulseWidthStartingEdge
The edge to begin measuring the pulse width. The value of edge determines whether to measure a high or low pulse. - customScaleName
- Type: SystemString
The name of the custom scale to apply to the local virtual channel.
Return Value
Type: CIChannelThe newly created CIChannel.
Exceptions
| Exception | Condition |
|---|---|
| DaqException | The NI-DAQmx driver returned an error. |
Remarks
With the exception of devices that support multi-counter tasks, you can create only one CIChannel at a time with this function because a task can contain only one CIChannel. To read from multiple counters simultaneously, use a separate task for each counter.
This method creates a virtual channel for the physical channel name you specify.
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. CreatePulseWidthChannel(String, String, Double, Double, CIPulseWidthStartingEdge, String) 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.