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E.2 DNP POINT LISTS
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.
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),
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)
E
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 E–4: BINARY AND FROZEN COUNTERS
POINT
NAME/DESCRIPTION
INDEX
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
A counter freeze command has no meaning for counters 8 and 9. N60 Digital Counter values are represented as 32-bit
integers. The DNP 3.0 protocol defines counters to be unsigned integers. Care should be taken when interpreting negative
counter values.
E-10
10 (freeze and clear, noack), 22 (assign class)
N60 Network Stability and Synchrophasor Measurement System
APPENDIX E
E.2.3 COUNTERS
GE Multilin
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