I recently upgraded Ignition from v7.9.0 to v7.9.3
However, I observed that my PLC tags taken from Siemens S7-400 PLC behaved erratically since the upgrade.
Before the upgrade, my PLC tags remained live & connected but after upgrading, these tags go Uncertain for a few seconds, then come back live for next few seconds & again go Uncertain. This cyclical change is affecting my Trends & Charts & also my reporting.
What could be the reason for such behavior.
P.S. I also tried upgrading Siemens module from v4.9.3 to v4.9.4 but it didn’t help.