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9
DEVICE EXPLANATION
(8) Precautions for using timers
The following are a few precautions regarding timer use:
(a) Use of the same timer
(b) When set value is 0
(c) When set value is changed after time-out
A given timer cannot be designated (by OUT T ) more than once in a single
scan.
This designation results in measurement, since the timer current value is updated
at execution of each OUT T
OUT
END
T
Sequence
program
Diagram 9.23 When the same timer is used
If the timer set value is "0", the contact turnes ON when the OUT T
executed.
If the set value changes to a value which is higher than the current value following
a timer "time-out", the "time-out" status will remain in effect, and timer operation
will not be performed.
instruction.
OUT
OUT
OUT
T
T
END
T
1 scan
9.2 Internal User Devices
OUT
T
Current value
is updated.
instruction is
9
- 23
9.2.8 Timer (T)
9
10
11
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