GE Power Management
ALPS Advanced Line Protection System B-3
APPENDIX B B.2 REGISTER MAPS
B
B.2 REGISTER MAPS B.2.1 SUMMARY
a) FIXED VALUE REGISTERS (START ADDRESS 0000)
This is fixed data (read-only) reported by the ALPS.
b) DYNAMIC VALUE REGISTERS (START ADDRESS 1000)
This is metered actual values and other dynamic data reported by the ALPS.
c) EVENT REGISTERS (START ADDRESS 2000)
All Events stored in the ALPS will be in time order, starting with the most recent event. There can be at most 150 events.
d) REPORT REGISTERS (START ADDRESS 1131; DATA STARTS AT 20000)
Report registers are a special set of registers that must be accessed by following a strict protocol sequence. The nature of
some reports is such that the report data varies with certain values of device settings. Given the fact that report data is vari-
able, it is not possible to assign a fixed number of registers that will represent this data. Instead, the following sections pro-
vide a byte sequence that describe the format of the different reports.
FAULT REPORT
Detailed information about a fault can be accessed from the device by requesting a fault report read. The byte sequence for
fault reports is as follows:
Table B–2: FAULT REPORT BYTE SEQUENCE
REGISTER FIELD SIZE
(BYTES)
BYTE FORMAT DESCRIPTION
20000 FAULT NUMBER 2 Unsigned Integer Current fault report number
20001 TRIP DATE 4 F1 Date of trip in MM/DD/YYYY format
20003 TRIP TIME 4 F2 Time of trip in HH.MM.SS.sss format
20005 RELAY OPERATING TIME 2 Unsigned Integer Relay operating time in sample counts
20006 BREAKER OPERTATING TIME 2 Unsigned Integer Breaker operating time in sample counts
20007 FAULT TYPE 2 F61 Fault type message
20008 TRIP TYPE 2 F17 Trip type message
20009 DISTANCE in miles 2 P10 Distance in miles
20010 PREFAULT Ia 2 P100 RMS phase A current
20011 PREFAULT Ib 2 P100 RMS phase B current
20012 PREFAULT Ic 2 P100 RMS phase C current
20013 PREFAULT In 2 P100 RMS neutral current
20014 FAULT Va 2 P10 RMS phase A voltage
20015 FAULT Vb 2 P10 RMS phase B voltage
20016 FAULT Vc 2 P10 RMS phase C voltage
20017 FAULT Ia 2 P100 RMS phase A current
20018 FAULT Ib 2 P100 RMS phase B current
20019 FAULT Ic 2 P100 RMS phase C current
20020 FAULT In 2 P100 RMS neutral current
20021 CYCLES 2 Unsigned Integer Cycles per fault
20022 PREFAULT 2 Unsigned Integer Prefault cycles per fault
20023 PRTRIP 2 Unsigned Integer Percent of oscillography fault data to put as pretrip
data
20024 OSC DATA CONTINUITY 2 Unsigned Integer 0: Oscillography data is continuous
1: Delayed trip is taken care of by incorporating
discontinuity in the oscillography data
20025 NUMSETT 2 Unsigned Integer Number of settings in the ALPS
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