Hi, I'm having problems with the communication between the maintenance station and the PC stations. I'm following all the steps on the manual of the Maintenance Station V10 about the communication configuration in WinCC but it doesn't work. The WinCC connection with each PC Station is with WinCC OPC UA channel, but when I try to access to the data of the server, a window with a message error shows appears but I still can't fix it. Is there other way to make the communication with the other PC's? If not, How can I make it with the WinCC OPC UA Chanel?

Hello UOlvera9

Ensure each PC station has its own OPC UA connection in the Maintenance Station’s OS project, named after its computer name. This is typically auto-created during AS-OS transfer via the OPC UA WinCC Channel.
Verify the certificate exchange between the Maintenance Station and PC stations. Move the certificates manually:
On Maintenance Station:
From: C:\Program Files (x86)\Siemens\WINCC\OPC\UAClient\PKI\Rejected\Certs
To: C:\Program Files (x86)\Siemens\WINCC\OPC\UAClient\PKI\Trusted\Certs
On PC Stations:
From: C:\Program Files (x86)\SIEMENS\WINCC\OPC\UAServer\PKI\CA\Rejected\Certs
To: C:\Program Files (x86)\SIEMENS\WINCC\OPC\UAServer\PKI\CA\Certs
After moving the certificates, restart the Runtime on both Maintenance and PC stations