Connection to OPC UA Server not possible error when activate ARSim monitoring

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1

Hello Community,

One of our customer is facing issue when using monitor mode for Ladder Diagram.

I am able to use monitor mode with the same project without any errors. However, on his PC after he log in with the created user after activating monitor mode, he is getting this error message.

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Any idea what is causing this error and how to resolve it?

Thanks in advance.

Best regards,
Alvin

2

Most likely some other server running on the port 4840.

Some troubleshooting instructions from Automation Help. (In mapp View context but should not make a difference in this case).
Automation Help: No OPC UA connection to ARsim

3

Hello Tommi,

Thank you for your reply.

You were right, port 4840 was already being used by another service on his PC, which caused the conflict. After changing the OPC UA server port to 4841, the issue was resolved and the connection is now working properly.