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I am going through the Unified training and trying to set up the OPC UA.  The issue I'm running into is trying to configure the certificates.  I am able to create the CA and generate a certificate.  I can export the CA and install it with the OPC UA configuration manager.  What I can't do is install the certificate within the WinCC Unified Certificate Manager. The option to "Install" certificate is grayed out (see image), and I can't find anything that would explain what I did wrong.  "Install all Certificates" for the device is also grayed out. I have tried following some older instructions to export the certificate and install it from the *.der file, but that does not work (no tag connection to OPC).  I'm guessing that the tag will not connect until I see the certificate in the WinCC Unified Certificate Manager, but I don't know how to get it there if the install option is not available. I have also tried to add the device by IP address instead of name, but that didn't help.   Due to corporate security, I cannot modify my PC firewall as described in the training video.  Instead, I am having to run the Kepware to HMI setup across two VMs.  My configuration is: TIA Portal v20 on Win10 VM | KEPServerEX on another Win10 VM (same host PC) Ping works between VMs by IP and by Name.  I can get TIA to read the OPC tags from Kepware and add them to the HMI tag table.  HMI simulation works correctly on TIA VM.   Any pointers or suggestions would be greatly appreciated.

asked 2025-07-03

2 answers