I'm reading values from the Experion OPC server to the DeltaV OPC server in the OPC mirror.
In the OPC mirror/monitor mapped items, the values are constantly updating in both servers, but for some pipes on the DeltaV side it is showing "OPC_NO_QUALITY_NO_VALUE." I simply restarted the workstation and the pipes stuck in "OPC_NO_QUALITY_VALUE" started to update "Write Success."
I would like to know what causes "OPC_NO_QUALITY_NO_VALUE" in the DeltaV OPC server, even though the values are updating on the Experion server.