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2. Prog rammi ng Con cep ts
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T0
Y0
X0
TMR
T0
K100
X0
T0
Y0
K100
10 sec
present
value
Accumulative Timer
For ELC-PB/PC/PA/PH, ELCB-PB, and ELCM-PH/PA controllers: The timer executes once when
the program reaches END instruction. When TMR instruction is executed, the timer coil will be ON
when the current value reaches its preset value. For accumulative timers, current value will not be
cleared when timing is interrupted.
For ELC-PV controllers: The timer executes once when the program reaches TMR instruction.
When TMR instruction is executed, the timer coil will be ON when the timing reaches its preset
value.
Timer T250 will begin timing when X0=ON. If T250 has not reached its preset value by the time
X0=OFF, then T0 will pause. When X0=ON, T250 will resume timing from where it was paused.
T250
Y0
X0
TMR
T250
K100
X0
T2
Y0
K100
T1+T2=10sec
T250
T1
present
value
Timers for Subroutines and Interrupts
Timers for subroutines and interrupts count once when END instruction is met. The associated
output coils will be ON if the set value is achieved when End instruction executes. Timers
T192~T199 (ELC-PC/PA/PH/PV controllers), T184~T199 (ELCM-PH/PA controllers) are the only
timers that can be used in a subroutine or interrupt. Generals timers used in subroutines and
interrupts will not work if the subroutines or interrupts are not executing.
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