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DEVICE EXPLANATION

9 - 24

9.2 Internal User Devices

9.2.9 Counter (C)

(1) Definition

A counter is a device which counts the number of input condition leading edges in

sequence programs.

When the count value matches the set value, the counter counts up and its contact

turns ON.

The counter is of an up-counting type.

(2) Count processing

(a) When OUT C instruction is executed

When and OUT C instruction is executed, the following counter processing

occurs: coil ON/OFF, current value update (count value + 1), and contact ON/OFF.

Counter current value update and contact ON/OFF processing are not performed

at END processing.

Diagram 9.24 Execution and processing of OUT C instruction

X100

K10

END OUT C0 END

[Ladder example]

Sequence

program

[Processing at OUT C0 Instruction (X100: OFF to ON)]

Coil ON/OFF

Current value update

Contact ON/OFF

Processing content

1 2 ... 175 176 177 178 179 180 181 182 183 184 185 ... 233 234

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