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9
DEVICE EXPLANATION
9
- 22
9.2 Internal User Devices
9.2.8 Timer (T)
(b) Accuracy
Measured value at END instruction is added to the current value when the
OUT T
instruction is executed.
If the timer coil is OFF when the OUT T
is not updated.
[Ladder example]
X100
[Current value update timing]
OUT T0
Program
ON
OFF
X100 external input
OFF
CPU module's X100
OFF
T0 coil
OFF
T0 contact
1
10ms measurement
Measured value at
END instruction
T0 current value
Input reading timing
(+1 scan)
The timer response accuracy from when reading input (X), until when outputing it
is + (2-scan time + timer time limit setting).
H
K8
T0
OUT T0
OUT T0
END
END
END
processing
processing
processing
ON
ON
2
1
2
3
1
2
2
3
0+2=2
2+3=5
Diagram 9.22 Timer accuracy (For 10ms)
instruction is executed, the current value
OUT T0
OUT T0
END
END
processing
processing
ON
1
2
3
1
2
1
2
3
2
5+2=7
7+3=10
Timer accuracy
-
(1 scan time + timer time limit setting)
to (1 scan time)
OUT T0
END
processing
2
3
3
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