CHAPTER 5: SETTINGS CONTROL ELEMENTSD30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL 5-2875There are eight identical digital counters, numbered from 1 to 8. A digital counter counts the number of state transitionsfrom Logic 0 to Logic 1. The counter is used to count operations such as the pickups of an element, the changes of state ofan external contact (for example, breaker auxiliary switch), or pulses from a watt-hour meter.COUNTER 1 UNITS — Assigns a label to identify the unit of measure pertaining to the digital transitions to be counted. Theunits label appears in the corresponding actual values status.COUNTER 1 PRESET — Sets the count to a required preset value before counting operations begin, as in the case where asubstitute relay is to be installed in place of an in-service relay, or while the counter is running.COUNTER 1 COMPARE — Sets the value to which the accumulated count value is compared. Three FlexLogic outputoperands are provided to indicate if the present value is ‘more than (HI)’, ‘equal to (EQL)’, or ‘less than (LO)’ the set value.COUNTER 1 UP — Selects the FlexLogic operand for incrementing the counter. If an enabled UP input is received when theaccumulated value is at the limit of +2,147,483,647 counts, the counter rolls over to –2,147,483,648.COUNTER 1 DOWN — Selects the FlexLogic operand for decrementing the counter. If an enabled DOWN input is receivedwhen the accumulated value is at the limit of –2,147,483,648 counts, the counter rolls over to +2,147,483,647.COUNTER 1 BLOCK — Selects the FlexLogic operand for blocking the counting operation. All counter operands are blocked.CNT1 SET TO PRESET — Selects the FlexLogic operand used to set the count to the preset value. The counter sets to thepreset value in the following situations:• When the counter is enabled and the CNT1 SET TO PRESET operand has the value 1 (when the counter is enabled andCNT1 SET TO PRESET operand is 0, the counter sets to 0)• When the counter is running and the CNT1 SET TO PRESET operand changes the state from 0 to 1 (CNT1 SET TO PRESETchanging from 1 to 0 while the counter is running has no effect on the count)• When a reset or reset/freeze command is sent to the counter and the CNT1 SET TO PRESET operand has the value 1(when a reset or reset/freeze command is sent to the counter and the CNT1 SET TO PRESET operand has the value 0, thecounter sets to 0)COUNTER 1 RESET — Selects the FlexLogic operand for setting the count to either “0” or the preset value depending on thestate of the CNT1 SET TO PRESET operand.COUNTER 1 FREEZE/RESET — Selects the FlexLogic operand for capturing (freezing) the accumulated count value into aseparate register with the date and time of the operation, and resetting the count to “0.”COUNTER 1 FREEZE/COUNT — Selects the FlexLogic operand for capturing (freezing) the accumulated count value into aseparate register with the date and time of the operation, and continuing counting. The present accumulated value andcaptured frozen value with the associated date/time stamp are available as actual values. If control power is interrupted,the accumulated and frozen values are saved into non-volatile memory during the power-down operation.
