User's Manual

RTM Elster AMCO applicative PFS Coronis Systems
4.4.Writing RTC parameter
RTM Elster AMCO RTC can be updated using “Write Parameter” command.
RTC Structure :
RTC (internal parameter ID = 0x04)
Day Month
Year
(1)
Day of the
week
(2)
Hour Minute Seconds
1 byte 1 byte 1 byte 1 byte 1 byte 1 byte 1 byte
(1) Year = 0x00 means that the current year is 2000
(2) Day of the week : value from 0 to 6:
Day of Week Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Value
0 1 2 3 4 5 6
ATTENTION :
1) When configured in Fixed Network Mode, and when synchronized on the network, RTM
Elster AMCO RTC is updated automatically through Radio Synchronization mechanism.
In this case, it is not allowed to update RTC from the user software because it can
disturb the Pseudo Bubble Up emission sequence.
2) When configured in Fixed Network Mode, RTM Elster AMCO Clock Synchronization
accuracy is maintained below 2 seconds thanks to Coronis Synchronization scheme.
When configured in Drive By (or Walk By) Mode, Clock drift is defined by the 32kHz
used as a reference for RTM Elster AMCO. To reduce this clock drift, RTM Elster
AMCO 32kHz reference clock is calibrated in manufacturing stage and an embedded
feature will balance the clock temperature drift.
3) It is not advised to switch the network RTC from winter to summer time and conversely
since it could have a transient impact on Pseudo Bubble Up emission sequence,
Datalogging accuracy, TOU Buckets accuracy, and all applicative periodic events that
could happen on RTM Elster AMCO.
4) Writing RTC parameter on an unsynchronized RTM will automatically deactivate the
TOU Buckets functionnality
EVO RTM-UserMan 21