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