Hi,

After upgrading from WinCC V7.5.2.17 to V8.1.0.0, the OpcUaServerWinCC service is immediately paused after starting the server and activating runtime. Connectivity Pack license for V8.1 is okay and active in the ALM.

We cannot get any communication with OPC UA, and we get BadCommunicationError from our UaExpert on another server.

We've tried to update the certificates according to this article: https://support.industry.siemens.com/cs/de/en/view/109826043
 

Any suggestions to what might be the issue?

Murof

Hello ostlar

Check also this basic FAQ, perhaps some information helps:

https://support.industry.siemens.com/cs/de/en/view/109763316

 

And do you have made a restart of the WIndows OS after all changes also with certificates?

Do you have exported the CA from Certificate manager and then installed it to trusted cert stores in Windows?

 

Bye Murof

Thanks for the info!

The requirements are met, and OPC was working well before the upgrade.

I have made sure to restart after every solution I've tried. The certificate is exported and added to trusted certs.

Windows Firewall and Defender is deactivated.

I have yet to reinstall OPC, that might be an option.

• WinCC OPC-UA Server
• WinCC OPC-UA Client
• WinCC OPC Server
• OPC UA Local Discovery Server
• ConnectivityPack Server

Hi Murof,

I just created a support ticket, hoping for an answer soon. Thanks for the help.

EDIT: They just replied as I posted this.

unknown user

Please check the following points:

• Is the OPC UA Server activated in the WinCC Project under the computer settings?
• Does the OPC UA Server start and can be accessed with a new project?
• Please also check the points of the following FAQ: https://support.industry.siemens.com/cs/ww/en/view/109763316

 
So under Computer > Server name > Properties in WinCC Explorer there is a checkbox to activate OPC UA Server. Apparently it had been deactivated after the upgrade, and I had no idea it existed. It was that easy.. Oh well