56
7
−
2
−
5. Hysteresis on comparator
Comparator S1 and S2 of the instrument can set the hysteresis because of the chattering
prevention of the output relay.
Hysteresis can be used by combining setting by the width of data and combining setting by the
time width. Moreover, effective directions of hysteresis can be selected from either ”Off delay” or
”On delay”.
These selections are done in the function mode (related function F
−
34, F
−
35, and F
−
36).
Default has set hysteresis “OFF”.
Warning
●
Depending on the setting of comparator hysteresis, ON/OFF condition
for each contact 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.
The operation of judgement display panel and the contact output when the hysteresis of the
comparator is set is shown as an example of S1 below.
The operation becomes similar as for S2.
(1) When the operation of “contact 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 contact
output
ON
OFF
S1 set value
Di
sp
la
y
Hysteresis
data width
Hysteresis time width
Time
