CHAPTER 4: SETPOINTS
DEVICE
889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
4–39
Change Event Variation reported when variation 0 requested:
2 (Binary Input Change
with Time), Configurable
Change Event Scan Rate:
8 times per power system cycle
Change Event Buffer Size:
1024
Default Class for All Points:
1
POINT NAME/DESCRIPTION COUNTERS
The following details lists both Binary Counters (Object 20) and Frozen Counters (Object 21).
When a freeze function is performed on a Binary Counter point, the frozen value is
available in the corresponding Frozen Counter point. 889 Digital Counter values are
represented as 16 or 32-bit integers. 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 Counter
Change Event without time)
Change Event Buffer Size:
10
Default Class for all points:
3
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 Digital Counter 9
9 Digital Counter 10
10 Digital Counter 11
11 Digital Counter 12
12 Digital Counter 13
13 Digital Counter 14
14 Digital Counter 15
15 Digital Counter 16
