How to timestamp events with BMXERT1604 module when the NTP clock time is changing backward comparated with the last timestamped event

When the new time provided by NTP is lower than the timestamp of the last event, the new time is rejected and the last event time is kept.

This situation can occur when NTP time updates and internal timer drifts accumulate.

This “blocking” mechanism is necessary; otherwise, SCADA systems could flush or mishandle events stamped with a lower timestamp than previous ones.

As a result:

• The ERT intentionally blocks timestamp updates until time exceeds the last valid event timestamp.
• This prevents timestamp regression, which could corrupt event sequencing in SCADA systems.