Modbus Palette Missing in LabVIEW

Updated Oct 1, 2020

Reported In


  • LabVIEW
  • LabVIEW Real-Time Module

Issue Details

  • I recently installed the LabVIEW Datalogging and Supervisory Control Module, and I don't see the Modbus API in the Functions palette.
  • I was using the LabVIEW Modbus API with the LabVIEW Real-Time Module, and now I can't find the palette anymore.


For a new installation that where you have never seen the functions palette, follow the steps below:
  • Since the Datalogging and Supervisory Control Module is only supported in 32-bit LabVIEW, ensure that you are using 32-bit and not 64-bit LabVIEW. 
  • Additionally, ensure that you have followed the steps listed in the Missing Icons on LabVIEW Functions or Controls Palette article.
  • Run a Repair of the Datalogging and Supervisory Control Module from NI Package Manager

If you had been using the Modbus API from the LabVIEW Real-Time Module, and are now not able to see it in your palette:

It should be noted that the Modbus palette will only appear in VIs that are under a Real-Time target in your LabVIEW project.
  • Try simulating a Real-Time target and creating a VI there to see if the palette appears.
  • You can then move the VI back under the My Computer target.

Figure 1. Data Communications palette under 'My Computer' target

Figure 2. Data Communications palette under Real-Time target