BGX501-943-R01 Prometer 100 User Manual Page 71 of 72
Can user set meter clock via Modbus communication protocol?
Time set transaction as per base time or DST time will be provided via DLMS communication protocol.
Only time synchronization as per base time or DST time will be provided via Modbus communication protocol.
Meter will reject the time sync request if it is above time adjustment limit.
What is the maximum time adjustment limit and how it works?
Time synchronization as per base time or DST time will be provided via Modbus communication protocol only.
Meter will not sync the time if the time difference is more than the time adjustment limit configured in the meter.
By default, the time adjustment limit is set as 25 seconds. The time adjustment limit can be configured as any
value between 0 to 30 seconds using ConfigView.
So, if user wants to change the meter time out of time adjustment limit then time set transaction has to be
performed via DLMS communication protocol.
How the logged values affected by the daylight saving time change?
Logged values during daylight saving time are labelled with the flag “Yes”. “Yes” means that the DST offset is
applied in the meter.
What are the possible consequences of adjusting forward the meter clock?
If the clock is adjusted forward over one or more interval limits, there will be empty spaces filled by zero value in
the logging memory.
What are the possible consequences of adjusting backward the meter clock?
It the clock is adjusted backward over one or more interval limits, one or more values will exist with the duplicate
day and same time stamps. Empty spaces will be filled by zero value in duplicate day. In the worst event, this
can result in data read from the meter not matching the expected period. Previous integration period and rising
demand data will be reset.
What are the possible consequences of adjusting backward or forward the meter clock within time
adjustment limit?
Integration period will be compressed for forward time sync and stretched for backward time sync. Data will be
logged as per integration period.
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