• Not Answered

PLC Modules Not Appearing on DeltaV OPC UA Server

I'm encountering an issue with the DeltaV OPC UA server. The connection is active and the server is running normally. However, when trying to access via MATLAB, the PLC modules do not appear when I use the browseNamespace function to retrieve the nodeList, preventing data collection. I also tested with OPC UA Expert, but the modules are still not displayed. Has anyone experienced this issue or know which DeltaV settings might be preventing the PLC modules from being shown on the OPC UA server?

• data collection
• Matlab
• OPC UA
• OPC
• DeltaV

Thiago Mai

• 25 Mar 2025 11:46 PM
• Cancel

1 Reply

• Andre Dicaire

  

  • 26 Mar 2025 2:59 PM

  What do you mean by a "PLC" module. Are these DeltaV Modules in an EIOC, or controller via a VIM, that provide access to the PLC data?
  
  If these are DeltaV Modules in a DeltaV node, they should be in the browser along with other modules. First step would be to use a test client such as UA Expert that would either confirm the issue is with the DeltaV browser and not the MATLAB client. Having the test client enables you to do further tests.
  
  DeltaV provides and OPC DA test client called OPCWatchit. This client has a browser as well. This not an OPC UA client but access the underlying OPC DA server that the UA Client access. If the browser does not work there for these modules, the issue lies within DeltaV. If it works there but not with UA Expert Client, and Matlab client, the issue would be in the UA exposed browser. If the issue only occurs with the Matlab client and not UA Expert, the issue would appear to be with that client.
  
  If this is an issue with DeltaV, you should log a call with the GSC to document and get support. Are you running an older version of DetleV (v13 or earlier)?
  
  Another test is to manually configure your Client path to the desired parameter. The Browser is not part of the runtime OPC communication. You should be able to set your Matlab Client path to the correct path and access the data.

  Andre Dicaire

  • Cancel