VeriStand .NET API Reference

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Part 3: Adding Digital Input and Output Channels to a DAQ Device

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In this section, the example code adds and configures the digital inputs and outputs of a DAQ device:

  1. Adding a Digital Input Channel
  2. Adding a Digital Output Channel
  3. Adding Channel Mappings for DAQ Digital Inputs and Outputs

3a. Adding a Digital Input Channel to a DAQ Device
Obtain the reference to the existing Digital Input section under the DAQ device in the system definition using the GetDigitalInputSection method.


Remove the existing Digital Input section using the RemoveNode method. Removing any existing digital input channels prevents conflicts between existing channels and channels you add.


Create a new Digital Input section and add it to the DAQ device using the CreateDigitalInputs method.


Create a new DAQ DIO port by initializing a new instance of the DAQDIOPort class.


Create a new digital input channel by initializing a new instance of the DAQDigitalInput class.


Add the new digital input channel to the DAQ DIO port using the AddDigitalInput method.


Add the DAQ DIO port with the digital input channel to the Digital Input section using the AddDIOPort method.


Create an alias and link it to the new channel by:
  1. Obtaining the reference to the Aliases section using the Root dottable property and GetAliases method.
  2. Creating a new alias and adding it to the Aliases section using the AddNewaliasByReference method.

Related Links

DAQDIOPort Constructor

DAQDigitalInput Constructor

3b. Adding a Digital Output Channel to a DAQ Device
Obtain the reference to the existing Digital Output section under the DAQ device in the system definition using the GetDigitalOutputSection method.


Remove the existing Digital Output section from the system definition using the RemoveNode method. Removing any existing digital output channels prevents conflicts between existing channels and channels you add.


Create a new Digital Output section and add it to the DAQ device.


Create a new DAQ DIO port by initializing a new instance of the DAQDIOPort class.


Create a new digital output channel by initializing a new instance of the DAQDigitalOutput class.


Add the new digital output channel to the new DAQ DIO port using the AddDigitalOutput method.


Add the DAQ DIO port with the digital output channel to the new Digital Output section using the AddDIOPort method.


Create an alias and link it to the new channel by:
  1. Getting the reference to the Aliases section using the Root dottable property and GetAliases method.
  2. Creating a new alias and adding it to the Aliases section using the AddNewaliasByReference method.

Related Links

DAQDIOPort Constructor

DAQDigitalOutput Constructor

3c. Adding Channel Mappings for DAQ Digital Inputs and Outputs
Get the node path for the DO0 channel.


Get the node path for the DI0 channel.


Convert the node paths from strings to arrays using Build Array functions.


Map DI0 to DO0 using the Root dottable property and AddChannelMappings method.


Save the system definition file.

Related Links

Programming with the System Definition API in LabVIEW

Navigating the System Definition API

Previous Step
Part 2: Adding Analog Input and Output Channels to a DAQ Device		 Home
LabVIEW Walkthrough: Modifying a DAQ Device in a System Definition File		 Next Step
Part 4: Removing Broken Aliases and Channel Mappings

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