KB-31487: OPC communication stops working when logging off Windows.

Question:

Why does the OPC communication stop working when logging off Windows?

Solution:

This can occur because the OPC communication depends on certain users’ permissions to use Windows DCOM port. When logging off, the permission to use DCOM port can be lost, which stops the communication with the supervisory.

It is highly recommended that the steps described in the related articles below be followed thoroughly.

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