Omron SmartSlice GRT1-Series, Operation Manual

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50
Functions of Digital I/O Units Section 4-4
The input filter can also be used to perform an ON delay operation (a delay for
the ON response time is created when the input filter is enabled).
OFF Response Time When input data changes to OFF, the input data is read five times for the
period of the set interval (1/5 of the OFF response time). If all values are OFF,
the input is turned OFF. The OFF timing is delayed according to the length of
the OFF response time.
The input filter can also be used for ON/OFF delay operations.
To use a pulse shorter than the communications cycle time, set the OFF
response time to a value longer than the communications cycle time. (If the
input pulse is short, the input may remain ON.)
OFF
ON
ON
OFF
ON ON OFF OFF
4 3 2 1
ON
ON ON ON
4 3 2 1
OFF
ON
ON
OFF
Input data
Input data
ON delay time
(= input filter time)
Not all values are
ON during the four
samples, so the
input is regarded as
being OFF.
All values are ON
during the four
samples, so the
input is regarded
as being ON.
OFF
1
ON
5
OFF OFF ON
4 3 2
OFF
ON
ON
OFF
OFF
OFF
OFF OFF
4 3 2 1
OFF
5
OFF
ON
ON
OFF
Input data
Input data
ON delay time
(= input filter time)
Not all values are
OFF during the five
samples, so the input
is regarded as being
ON. All values are OFF
for all five samples,
so the input is
regarded as being
OFF.