CHAPTER 5: SETTINGS CONTROL ELEMENTSC70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL 5-22755.8.5 Time of day timersSETTINGS CONTROL ELEMENTS TIME OF DAY TIMERS TIME OF DAY TIMER 1(5)The time of day timer function provides the ability to program control actions based on real time. There are five identicaltimers, each with an independent start and stop time setting. Each timer is on when the C70 real-time clock/calendarvalue is later than its programmed start time, and earlier than its programmed stop time. The timers wrap around 24hours, as the figure shows.Figure 5-118: Time of day timer exampleThe TIME OF DAY 1 ON FlexLogic operand follows the state of the timers. In addition, one-second pulses are generated on theTIME OF DAY 1 START and TIME OF DAY 1 STOP FlexLogic operands when the timers turn on and off, respectively (see thefollowing figure). These operands can be combined in FlexLogic with the day and month FlexLogic operands and/or withFlexElements operating on the DAYOFYEAR, DAYOFMONTH, and SECONDOFDAY FlexAnalog parameters to create virtuallyany time and date condition for custom time or season-based control actions. To activate these FlexAnalog parameters,enable at least one time of day timer.Figure 5-119: Close/open/maintain control via FlexLogic operandsIf the relay is connected to an external clock that follows daylight savings time changes, take care that the changes do notresult in undesired operation.The following settings are available for each time of day timer element.TIME OF DAY TIMER 1 START TIME — Used to program the relay clock/calendar value for which the timer turns on.TIME OF DAY TIMER 1 STOP TIME — Used to program the relay clock/calendar value for which the timer turns off.TIME OF DAY TIMER 1 EVENTS — If enabled, the TIME OF DAY 1 ON and TIME OF DAY 1 OFF events are logged. TIME OF DAY TIMER 1 TIME OF DAY TIMER 1FUNCTION: DisabledRange: Disabled, Enabled TIME OF DAY TIMER 1START TIME: 00:00Range: 00:00 to 23:59 in steps of 00:01 TIME OF DAY TIMER 1STOP TIME: 23:59Range: 00:00 to 23:59 in steps of 00:01 TIME OF DAY TIMER 1TARGETS: DisabledRange: Self-reset, Latched, Disabled TIME OF DAY TIMER 1EVENTS: DisabledRange: Disabled, Enabled842800A1.CDR24:0021:0018:0015:0012:0009:0006:0003:0000:00Time of day timer 2t start (5) t stop (5)Time of day timer 1Time of day timer 3Time of day timer 4Time of day timer 5842801A2.CDRTIME OF DAY 1 ONTIME OF DAY 1 STARTTIME OF DAY 1 STOPStart time Stop time
