F-10 T60 Transformer Protection System GE Multilin
F.2 DNP POINT LISTS APPENDIX F
F
F.2.3 COUNTERS
The following table lists both Binary Counters (Object 20) and Frozen Counters (Object 21). When a freeze function is per-
formed on a Binary Counter point, the frozen value is available in the corresponding Frozen Counter point.
A counter freeze command has no meaning for counters 8 and 9. T60 Digital Counter values are represented as 32-bit inte-
gers. The DNP 3.0 protocol defines counters to be unsigned integers. Care should be taken when interpreting negative
counter values.
BINARY COUNTERS
Static (Steady-State) Object Number: 20
Change Event Object Number: 22
Request Function Codes supported: 1 (read), 7 (freeze), 8 (freeze noack), 9 (freeze and clear),
10 (freeze and clear, noack), 22 (assign class)
Static Variation reported when variation 0 requested: 1 (32-Bit Binary Counter with Flag)
Change Event Variation reported when variation 0 requested: 1 (32-Bit Counter Change Event without time)
Change Event Buffer Size: 10
Default Class for all points: 3
FROZEN COUNTERS
Static (Steady-State) Object Number: 21
Change Event Object Number: 23
Request Function Codes supported: 1 (read)
Static Variation reported when variation 0 requested: 1 (32-Bit Frozen Counter with Flag)
Change Event Variation reported when variation 0 requested: 1 (32-Bit Frozen Counter Event without time)
Change Event Buffer Size: 10
Default Class for all points: 3
Table F–4: BINARY AND FROZEN COUNTERS
POINT
INDEX
NAME/DESCRIPTION
0 Digital Counter 1
1 Digital Counter 2
2 Digital Counter 3
3 Digital Counter 4
4 Digital Counter 5
5 Digital Counter 6
6 Digital Counter 7
7 Digital Counter 8
8 Oscillography Trigger Count
9 Events Since Last Clear
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