Enhancement for Advise tags to poll OPC server when Excmax expires
Currently, when an advise tag does not get a value in an ExcMax period, the interface will send the same value to PI over again without going to the OPC server (assuming that the OPC interface has not disconnected from the OPC server during that interval). This can cause the OPC interface to continuously send the wrong value to PI over and over again. ( last known good value) with current timestamp
This enhancement would allow the interface to behave in the following way:
When advise tags are configured and ExcMax expires, the interface would poll the OPC server for the current value. The dvise read would then grab the current value/ timestamp in the OPC server's cache.
Note: This was previously Enhancement 122422.
This would really be very helpfull in our case too. We also have the same issue.
Jinmo Yi commented
This enhancement will greatly help to monitor the interface/OPC Server's health status.