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7−2−6. Hysteresis on comparator
The comparator S1, S2, S3 and S4 and normal mode for S0 (Function F−33: 00002 setting) can
set hysteresis.
Hysteresis can be used by the combined setting of data width and time width. Moreover,
effective direction for hysteresis can be selected from either “Off delay” or “On delay”.
These selections can be made in Function mode. (Related function F−34, F−35, F−36) As for
default, hysteresis “OFF” is set.
Warning ● Depending on the setting of comparator hysteresis, ON/OFF condition
for each open collector output may differ. If wrong mode is selected,
ON/OFF condition for contact output becomes inadequate and it may
cause an unexpected accident due to malfunctions on peripheral
instruments, so care should be taken fully.
As for the example of S1, the operation of judgement display section and the open collector
output when the hysteresis on comparator is set, will be shown as follows：
The same operation will be obtained in the case of “Normal mode” at S2, S3, S4 and S0.
(1) When the operation of “the open collector ON at more than the set value” is selected at S1 and
also effective direction for hysteresis is set as “On delay”.
S1 judgement
display
S1 open
collector output
ON
OFF
S1 set value
Display
Hysteresis
data width
Hysteresis time width
Time
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