Counter (C) - Mitsubishi MELSEC QS Series User Manual

9
DEVICE EXPLANATION

9.2.9 Counter (C)

(1) Definition
(2) Count processing
9
- 24 9.2 Internal User Devices
9.2.9 Counter (C)
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.
(a) When OUT C instruction is executed
When and OUT C
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.
[Ladder example]
X100
[Processing at OUT C0 Instruction (X100: OFF to ON)]
Sequence
program
Diagram 9.24 Execution and processing of OUT C
instruction is executed, the following counter processing
K10
C0
END OUT C0 END
Processing content
Coil ON/OFF
Current value update
Contact ON/OFF
instruction