Community
Question: The OPC DA server is not accessible in a service account.
17.02.2026 17:18
by
MICHOUX, EMMANUEL (SMO RI MT FR ADC-ATS OCC MD)
Hello,
When the OPC DA server is running in a Windows SYSTEM service account, this server is not accessible with a client such as Matrikon Explorer. WINCC.OA.1 is visible, but it is not possible to access the OPC tags. The DCOM configuration is set for local and remote SYSTEM, Admin (execution, activation, read/write). Matrikon Explorer is running in the Admin account.
The OPC DA server is accessible if it is running under an administrator account.
WCCOA V3.20.8
Windows 2019 LTSC
Regards
Emmanuel
This question has been edited.
Responses (1)
13.04.2026 15:27
by
Knipp, Leopold (DI FA HMI SW ETM PS CC)
Is the OPC DA client running on the same computer as the WinCC OA OPC DA Server?
If you try it from a remote computer please ensure first that it works on the local system.
Best Regards
Leopold Knipp
Senior Support Specialist
Log in to write a response to this question.