Mitsubishi Q00JCPU User Manual page 484

9
DEVICE EXPLANATION
9
9.2 Internal User Devices
- 33
9.2.11 Counter (C)
(b) Current value update (count value + 1)
The current value update (count value + 1) is performed at the leading edge (OFF
to ON) of the OUT C
The current value is not updated in the following OUT C
OFF, ON to ON, ON to OFF
[Ladder example]
X0
[Current value update timing]
Sequence
program
OFF
X0
Coil C0 OFF
POINT
Multiple counters can be used within a single scan to achieve the maximum
counting speed.
In such cases, the direct access input (DX ) method should be used for the
counter input signals.(
OUT
END
Sequence
program
Diagram 9.30 Ladder example for increasing the maximum counting speed
instruction.
K10
C0
END OUT C0
ON
ON
Current value update
Diagram 9.29 Current value update timing
Section 3.8.2)
OUT OUT
C C C
instruction statuses:
END OUT C0 END
Current value update
OUT OUT
END C C
OUT C
intervals
OUT C0
execution