Applies To:
  • CitectSCADA

The OPC driver can cause CitectSCADA to hang under the following conditions:
1. A write request is issued to the driver
2. Processing the write operation takes a long time (such as the device being disconnected from the network and the operation needing to time out)
3. A read request is issued.

CitectSCADA can hang processing the read request until the write request has
finished processing.

This problem has been fixed in OPC driver version

OPC disconnect hang pause offline