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C.3 POINT LISTS
An operate of an Output point may fail even if the command is accepted due to other inputs or conditions exist-
ing at the time. To verify the success or failure of an "OPERATE" of an output point, the associated Binary or
Analog Input(s) may be examined after the control operation is performed.
When using Object 10 to read the status of any Binary Output, a value of zero will always be returned. This is
because all points are "Pulse On" and are deemed normally off.
Table C–5: POINT LIST: OBJECTS 20 & 21
C
INDEX
DESCRIPTION
0
Breaker Health Accumulator – Phase A
1
Breaker Health Accumulator – Phase B
2
Breaker Health Accumulator – Phase C
3
Number Of Trips – Phase A
4
Number Of Trips – Phase B
5
Number Of Trips – Phase C
None of the above counters can be cleared with the Freeze/Clear (function code 9) operation. Instead, the con-
trol relay output block points can be used to clear groups of counters. There is only one copy of each counter,
so clearing a counter from other serial ports or MMI causes the corresponding DNP counter point to be cleared
and vice-versa. However, note that counters 2 to 5 cannot be cleared using DNP protocol. The Breaker Health
can be set via MMI or from other serial ports using GE_MODEM, MODBUS or ASCII protocols.
C-
14
BINARY COUNTER (OBJECT 20)
FROZEN COUNTER (OBJECT 21)
LPS-D Line Protection System
C.3.4 BINARY COUNTER, FROZEN COUNTER
ROLLOVER POINT
4294967295
4294967295
4294967295
65535
65535
65535
GE Power Management
APPENDIX C
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