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8.5.8 Neutral current balance event log

Neutral  current  balance  event  log  registers  neutral  current  imbalance  events.  Each  imbalance
event  creates  entry  in  the  event  log.  Entry  contains  date  and  time  of  event,  as  well  as  status
indicating type of event. Neutral current balance event log stores 20 entries, i.e. date and time of
last  20  events.  Furthermore,  a  dedicated  counter  (OBIS  =  C.60.23)  counts  the  total  number  of
errors [0T.9999].
P.98.23*##(ST)(Timestamp), where ## - number, ST-status bits:

1710 – neutral current is lower than phase current

1720 – neutral current is higher than phase current

8.5.9 Magnetic field influence event log

Influence of magnetic (see

Table 3-2

) field event log registers tampering attempts to influence

metering results by external magnetic field. Although meter is immune to external DC magnetic
fields of 400 mT, it registers >5mT tampering attempts by means of Hall effect sensor. Event log
stores up to 60 entries, i.e. up to 30 magnetic field events (start + end). Furthermore, a dedicated
counter (OBIS = C.60.30) counts the number of occurrences [0T.9999] of “Magnetic field” events,
as well as a dedicated timer (OBIS = C.61.30) measures the total duration [0T99,999,999 s] of all
“Magnetic field” events.
Every entry of the log book is expressed as a string (example for IEC 62056-21):
P.98.30*##(ST)(Timestamp), where ## - event number, ST-status bits:

1E01 – influence of magnetic field start;
1E00 – influence of magnetic field end.

8.5.10

Opening of meter cover event log

Opening of meter cover event log registers tampering attempts to open main meter cover. Event
log stores up to 60 entries, i.e. up to 30 meter cover opening events (open + close). Furthermore,
a dedicated counter (OBIS = C.60.31) counts the number of occurrences [0T.9999] of “Meter
cover opening” events, as well as a dedicated timer (OBIS = C.61.31) measures the total duration
[0T99,999,999 s] of all “Meter cover opening” events.
Every entry of the log book is expressed as a string (example for IEC 62056-21):
P.98.31*##(ST)(Timestamp), where ## - event number, ST-status bits:

1F01 – opening of meter cover event start;
1F00 – opening of meter cover event end.

8.5.11

Opening of terminal cover event log

Opening  of  terminal  cover  event  log  registers  tampering  attempts  to  open  terminal  cover  of  the
meter.  Event  log  stores  up  to  60  entries,  i.e.  up  to  30  terminal  cover  opening  events  (open  +
close).  Furthermore,  a  dedicated  counter  (OBIS  =  C.60.32)  counts  the  number  of  occurrences
[0T.9999]  of  “Terminal  cover  opening”  events,  as  well  as  a  dedicated  timer  (OBIS  =  C.61.32)
measures the total duration [0T99,999,999 s] of all “Terminal cover opening” events.
Every entry of the log book is expressed as a string (example for IEC 62056-21):
P.98.32*##(ST)(Timestamp), where ## - event number, ST-status bits:

2001 – Opening of terminal cover event start;
2000 – Opening of terminal cover event end;
2081 – Opening of terminal cover event start (opened in fraud suspended mode);
2080 – Opening of terminal cover event end (opened in fraud suspended mode).

8.5.12

Clock change (setting) event log

Clock setting event log stores entries in case date and/or time of real time clock was changed, It
happens regardless date and/or time was changed via communication interface or manually via