topic Unable to read OPC UA variables from server in FlexSim Forum

Unable to read OPC UA variables from server

cheng_wei_n — Thu, 25 Feb 2021 16:06:17 GMT

[ FlexSim 21.0.2 ]

I am able to detect the variable under Node ID and I tried to use the code below to read the variable value but unable to do so. In another OPC UA client that I tested, it is able to read the value just fine. The server is a python script running locally attached below. Would appreciate the help.

New Python File.py

double value = Emulation.Variable("myvar").value;
return value;

Re: Unable to read OPC UA variables from server

jason_lightfoot_adsk — Thu, 25 Feb 2021 17:50:47 GMT

It works for me on a local host :

Can you try that? If that works I wonder if it could be a security issue.

Re: Unable to read OPC UA variables from server

cheng_wei_n — Fri, 26 Feb 2021 01:51:51 GMT

Ok the issue is resolved. I think I did not reset and run my model, that could be the reason why the variable value did not update. Thanks for your time!