AIChannelCollection.CreateRvdtChannel Method (String, String, Double, Double, Double, AIRvdtSensitivityUnits, AIExcitationSource, Double, Double, AIACExcitationWireMode, AIRvdtUnits)
- Updated2023-02-21
- 3 minute(s) read
Namespace: NationalInstruments.DAQmx
Assembly: NationalInstruments.DAQmx (in NationalInstruments.DAQmx.dll) Version: 20.7.40.49302
Syntax
public AIChannel CreateRvdtChannel( string physicalChannelName, string nameToAssignChannel, double minimumValue, double maximumValue, double sensitivity, AIRvdtSensitivityUnits sensitivityUnits, AIExcitationSource voltageExcitationSource, double voltageExcitationValue, double voltageExcitationFrequency, AIACExcitationWireMode voltageExcitationWireMode, AIRvdtUnits units )
Public Function CreateRvdtChannel ( physicalChannelName As String, nameToAssignChannel As String, minimumValue As Double, maximumValue As Double, sensitivity As Double, sensitivityUnits As AIRvdtSensitivityUnits, voltageExcitationSource As AIExcitationSource, voltageExcitationValue As Double, voltageExcitationFrequency As Double, voltageExcitationWireMode As AIACExcitationWireMode, units As AIRvdtUnits ) As AIChannel
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 expected from the measurement, in units. - maximumValue
- Type: SystemDouble
The maximum value expected from the measurement, in units. - sensitivity
- Type: SystemDouble
The sensitivity of the sensor. This value is in the units you specify with sensitivityUnits. Refer to the sensor documentation to determine this value. - sensitivityUnits
- Type: NationalInstruments.DAQmxAIRvdtSensitivityUnits
The units of sensitivity. - voltageExcitationSource
- Type: NationalInstruments.DAQmxAIExcitationSource
The source of excitation. - voltageExcitationValue
- Type: SystemDouble
The amount of excitation in volts that the sensor requires. - voltageExcitationFrequency
- Type: SystemDouble
The excitation frequency that the sensor requires, in hertz. Refer to the sensor documentation to determine this value. - voltageExcitationWireMode
- Type: NationalInstruments.DAQmxAIACExcitationWireMode
The number of leads on the sensor. Some sensors might require you to tie leads together to create a four- or five-wire sensor. Refer to the documentation for your sensor for more information. - units
- Type: NationalInstruments.DAQmxAIRvdtUnits
The units to use to return the measurement.
Return Value
Type: AIChannelThe newly created AIChannel.
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. CreateRvdtChannel(String, String, Double, Double, Double, AIRvdtSensitivityUnits, AIExcitationSource, Double, Double, AIACExcitationWireMode, AIRvdtUnits) 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.