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Chapter 4. PLC Program
13) CTR
(1) Definition
The counter is cumulative and turns ON the output when the current value arrives at the
set value.
The range of an output contact is‘0~15’(C0.0 ~ C0.F).(Ex: For‘10’, C0.A is an
output contact) An input is comprised of an Enable condition and a Count Pulse. If
Enable is turned OFF, the current value of a counter is reset to ‘0’, and the pulse
input after completion of counting is ignored.
(2) Sequence and timing chart
14) SET, RST
(1) Definition
The SET command maintains turning ON the output even though the input is turned OFF by
self holding the designated output contact ON when the input is turned ON.
The RST command maintains turning OFF the output even though the input is turned OFF by
self holding the designated output contact OFF when the input is turned ON.
(2) Sequence and timing chart
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