Rockwell Automation 865 Differential Protection Relay - Manual (Page 107)

Supporting Functions 4-15
865-UM001A-EN-P – July 2009
Figure 4.2 – Timer Output Sequence in Different Modes
The user can force any timer, which is in use, on or off. The forcing
is done by writing a new status value. No forcing flag is needed as in
forcing i.e. the output relays.
The forced time is valid until the next forcing or until the next
reversing timed act from the timer itself.
The status of each timer is stored in non-volatile memory when the
auxiliary power is switched off. At start up, the status of each timer
is recovered.
Table 4.11 – Setting Parameters of Timers
Parameter Value Description
TimerN
–
0
1
Timer status
Not in use
Output is inactive
Output is active
On hh:mm:ss Activation time of the timer
Off hh:mm:ss De-activation time of the timer
For each four timers there are 12 different modes available:
– The timer is off and not running. The output is off i.e. 0 all the time.
Daily The timer switches on and off once every day.
Monday The timer switches on and off every Monday.
Tuesday The timer switches on and off every Tuesday.
Wednesday The timer switches on and off every Wednesday.
Thursday The timer switches on and off every Thursday.
Friday The timer switches on and off every Friday.
Saturday The timer switches on and off every Saturday.
Sunday The timer switches on and off every Sunday.
MTWTF The timer switches on and off every day except Saturdays
and Sundays
MTWTFS The timer switches on and off every day except Sundays.
Mode
SatSun The timer switches on and off every Saturday and Sunday.