DAQmx Channels Not Appearing in PXI Real-Time LabVIEW Application

Updated Mar 6, 2018

Reported In

Hardware

  • PXI Controller

Software

  • LabVIEW Real-Time Module

Driver

  • NI-DAQmx

Operating System

  • NI Linux Real-Time

Issue Details

  • I am setting up Real-Time PXI system that includes a DAQ module. How will I access this module and channels in LabVIEW? Will I/O be deployed like a cRIO or R Series real-time targets? 
  • Why doesn't my DAQmx device appear under my Real-Time PXI target in the project explorer?

Solution

Most of our real-time targets such as cRIO, R Series Multifunction RIO, and sbRIO targets deploy I/O from the Project Explorer, as detailed in this white paper explaining distributed I/O
 
If you are using a Real-Time PXI chassis, your non-RIO modules will not show up in the Project Explorer. You can access the channels of your device through LabVIEW VIs just like Windows-based DAQmx projects. As an example, this real-time project below has a PXI running NI Linux Real-Time, so the DAQmx module onboard (a PXIe-6375 Multifunction I/O module) is not visible from Project Explorer.
 

You can validate your DAQmx module and channels are connected to the LabVIEW project by adding a DAQmx Physical Channel control to your project and seeing if the module I/O appear, like the example image below. 
 

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