AC800M Timesynchronization protection when connect to GPS Malfunctions
When AC800M is syncronizing time from GPS over SNTP.
When GPS malfuction and time changes to default mode, say year 1978 . Will the controller also goes to that time . is there any protection in the controller that -ve time above some limits will not be changes.
As with OPC DA, SNTP carries indication of quality.
If the SNTP server exposes a wrong time but with a good quality, the AC 800M will eventually track that wrong time.
I recommend studying the output from the SNTP client in AC 800M into the controller log.