Digital Counters - GE MI-869 Instruction Manual

MONITORING

Digital Counters

4–300
The 869 relay provides sixteen identical Digital Counters. A Digital Counter counts the
number of state transitions from logic 0 to logic 1.
The Digital Counters are numbered from 1 to 16. The counters are used to count
operations such as the Pickups of an element, the changes of state of an external contact
(e.g. breaker auxiliary switch), or the pulses from a watt-hour meter.
Path:
Setpoints > Monitoring > Functions > Digital Counters > Digital Counter 1 (16)
FUNCTION
Range: Disabled, Enabled
Default: Disabled
NAME
Range: Any 13 alphanumeric characters
Default: Counter 00001
UNITS
Range: Any 5 alphanumeric characters
Default: Unit 1
Assigns a label to identify the unit of measure with respect to the digital transitions to be
counted. The units label will appear in the metering corresponding Actual Values Status
under RECORDS/DIGITAL COUNTERS.
PRE-SET
Range: -2147483648, 0, +2147483647
Default: 0
The setpoint sets the count to a required pre-set value before counting operations begin,
as in the case where a substitute relay is installed in place of an in-service relay, or while
the Counter is running.
COMPARE
Range: -2147483648, 0, +2147483647
Default: 0
The setpoint sets the value to which the accumulated count value is compared. Three
FlexLogic output operands are provided to indicate if the present value is 'more than (HI)',
'equal to (EQL)', or 'less than (LO)' the set value.
UP
Range: Off, Any operand from the list of FlexLogic operands
Default: Off
The setpoint selects the FlexLogic operand, digital input, virtual input or remote input for
incrementing the Counter. If an enabled UP input is received when the accumulated
value is at the limit of +2147483647, the counter rolls over to -2147483648 and shows
the alarm 'Digital Counter 1 at Limit'.
DOWN
Range: Off, Any operand from the list of FlexLogic operands
Default: Off
The setpoint selects the FlexLogic operand, digital input, virtual input or remote input for
decrementing the Counter. If an enabled DOWN input is received when the accumulated
value is at the limit of +2147483647, the counter rolls over to -2147483648 and shows
the alarm 'Digital Counter 1 at Limit'.
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS