GE 845 Instruction Manual page 148

DEVICE
4–44
The DNP binary input data points are configured through the DNP / IEC104 POINT LISTS
BINARY INPUT / MSP POINTS menu. When a freeze function is performed on a binary
counter point, the frozen value is available in the corresponding frozen counter point.
BINARY INPUT POINTS
Static (Steady-State) Object Number: 1
Change Event Object Number: 2
Request Function Codes supported: 1 (read), 22 (assign class)
Static Variation reported when variation 0 requested: 2 (Binary Input with status),
Configurable
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. 845 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
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS