User's Manual

32 Meter Operation
componentlfundamentaofIrms
harmonicorderNthofIrms
ITHD
N



10
2
The following method is used to calculate VATHD.
componentlfundamentaofIrmscomponentlfundamentaofVrms
harmonicorderNthofIrmsharmonicorderNthofVrms
VATHD
N
*
)*(
10
2



Event Log
The event log records the occurrence of meter events and fault conditions that are
selected to be logged. The date and time of each event occurrence is included in the
log. Some events include numeric codes to provide more detail about the event, such
as the specific type of action that occurred, a table or procedure number, or the new
season or tariff that took effect. The event log shows a zero (0) when no code value is
available for that event, or if one of the available codes is zero and that is the valid
indication.
The event log stores up to 100 of the most recent events. When the event log is full,
the oldest events are over-written.
Status Events
The following are status events that can be selected for inclusion in the event log.
Status Name Description Event ID Descriptor
Primary Power
Down
Power off date and time.
Note: Power Up and Power Down
events are only logged after the Power
Outage Duration Threshold time has
elapsed.
1
Primary Power
Up
Power on date and time. This event is
triggered upon power restoration and
also the other reset causes listed in the
Codes column.
2 3 = Power failure
4 = Watchdog reset
5 = Code Bank Switchover event
8 = Brown-out
11 = Bootrom Switchover
Other codes are for Echelon internal use
Time Changed
(old time)
The previous date and time in effect
when the time was changed.
3 0 = A specific, absolute new time was written to the
meter.
A time = An amount of gradual time change
requested from the System Software.
See procedures 2064 and 10 in the meter procedure
tables below.