Hi, I have a project that exhibits some strange behavior. With the PLC up and running normally I now fire up the HMI and it will sometimes immediately trigger an alarm. The alarm message is configured to display the failing measured numeric and the test limit values being used, and so it is obvious that there is bogus data in those tag values, but they are stable and correct as I watch them in RS Studio. Once the HMI is active it behaves properly. It seems that there are transient values being used as the HMI boots up?
Through the history of this HMI development I've seen the problem move to a different alarm, disappear, reappear on a different alarm, and now disappear again as new HMI builds are generated.
Can anyone explain what might be happening or how to prevent it?
Tim
Through the history of this HMI development I've seen the problem move to a different alarm, disappear, reappear on a different alarm, and now disappear again as new HMI builds are generated.
Can anyone explain what might be happening or how to prevent it?
Tim