9 - 24
(b) Accuracy
The value obtained by the END instruction is added to the current value when the
OUT T or OUT
ST instruction is executed.
The current value is not updated while the timer coil is off even if the OUT T or OUT ST instruction is
executed.
Accuracy of the timer response that is from reading input (X) to output the data is up to "2-scan time
+ timer limit setting".
Figure 9.26 Timer accuracy (in the case of 10ms)
X0
TO
HK8
211 121 121
23 23 23
OUT T0 OUT T0 OUT T0
OUT T0
OUT T0
OUT T0
2
ON
OFF
OFF
OFF
ON
ON
OFF
ON
3
23 23
[Ladder example]
[Current value update timing]
Program
External
input to X0
CPU module's
X0
Coil of T0
Contact of T0
10ms counting
Count with END
instruction
Current value
of T0
END
processing
END
processing
END
processing
END
processing
END
processing
END
processing
0+2=2 2+3=5 5+2=7 7+3=10
Timer accuracy
- (1 scan time + timer limit setting)
to (1 scan time)
Input reading timing
(+1 scan)
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