Delta AS Series Programming Manual page 98

B. Accumulative timers
When the TMR instruction is executed, the accumulative timer begins to count. When the value of the timer matches
the timer setting value, the output coil is ON. As long as you add the letter S in front of the letter T, the timer
becomes an accumulative timer. When the conditional contact is OFF, the value of the accumulative timer is not
reset. When the conditional contact is ON, the accumulative timer counts from the current value.
•
When X0.0=ON and the timer T250 takes 100 ms as the timing unit, the output coil T250 is ON when the
value of the timer = timer setting value 100.
•
When X0.0=OFF or the power is off, the accumulative timer ST250 stops counting, and the value of the timer
stays the same. When X0.0=ON, the value of the timer is the accumulating value. When the accumulated
value = timer setting value 100, the output coil T250 is ON.
T1
X0. 0
T250(PV)
Y0. 0
C. Timers used in function blocks
T412–T511 are the timers that you can use in the function block or in interrupts.
When the TMR or END instruction is executed, the timer in the functional block begins to count. When the value of
the timer matches the timer setting value, the output coil is ON.
If you use a general-purpose timer in a function block or an interrupt, and the function or interrupt is not executed, the
timer cannot count correctly.
T2 T1+T2=10 sec
SV: K100
Cha p ter 2 De vices
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