CHAPTER 4: SETPOINTS DEVICE889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL 4–39Change Event Variation reported when variation 0 requested: 2 (Binary Input Changewith Time), ConfigurableChange Event Scan Rate: 8 times per power system cycleChange Event Buffer Size: 1024Default Class for All Points: 1POINT NAME/DESCRIPTION COUNTERSThe 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 isavailable in the corresponding Frozen Counter point. 889 Digital Counter values arerepresented as 16 or 32-bit integers. The DNP 3.0 protocol defines counters to be unsignedintegers. Care should be taken when interpreting negative counter values.BINARY COUNTERSStatic (Steady-State) Object Number: 20Change Event Object Number: 22Request Function Codes supported: 1 (read), 7 (freeze), 8 (freeze noack), 9 (freeze andclear), 10 (freeze and clear, noack), 22 (assign class)Static Variation reported when variation 0 requested: 1 (32-Bit Binary Counter withFlag)Change Event Variation reported when variation 0 requested: 1 (32-Bit CounterChange Event without time)Change Event Buffer Size: 10Default Class for all points: 3FROZEN COUNTERSStatic (Steady-State) Object Number: 21Change Event Object Number: 23Request Function Codes supported: 1 (read)Static Variation reported when variation 0 requested: 1 (32-Bit Frozen Counter withFlag)Change Event Variation reported when variation 0 requested: 1 (32-Bit CounterChange Event without time)Change Event Buffer Size: 10Default Class for all points: 3BINARY AND FROZEN COUNTERS POINT INDEX NAME/DESCRIPTION0 Digital Counter 11 Digital Counter 22 Digital Counter 33 Digital Counter 44 Digital Counter 55 Digital Counter 66 Digital Counter 77 Digital Counter 88 Digital Counter 99 Digital Counter 1010 Digital Counter 1111 Digital Counter 1212 Digital Counter 1313 Digital Counter 1414 Digital Counter 1515 Digital Counter 16
