We are doing some testing before migrating to 7.3.1 and we have exported a bunch of tags from our 7.2.8 system and imported into a test 7.3.1 system. A lot of our tags seem to be coming back as STALE. I believe all of these tags are Bridging to ControlNet using the PLC5 driver.
Initially we had the green ? tag symbol, but after restarting the gateway we have red outline tags. We have tried restarting the Gateway, the OPC-UA, and the Allen Bradley Drivers modules. We had seen similar issues in the past and usually a restart fixed the problem, but doesn’t seem to now.
The issue seems to be with the the OPC path composition. The tags that have issues in 7.3.1 are using the File/Bit (B3/89) notation which worked in 7.2.8. If we change a stale tag to file:word/bit (B3:5/9) notation it seems to be fine in 7.3.1. Tags with leading zeros in the address are also Stale (B3:00/6 works in 7.2.8 but only B3:0/6 works in 7.3.1).
Has the acceptable addressing changed? Is there something else to reset and reinitialize, or do we have to convert our addressing?