Omron DRT2 Series Operation Manual page 180

Section 7-3
Analog Input Terminals
3. Click the Comparator Tab and set each of the alarm values. The example
here shows the setting for Alarm Trip Point High (HH limit set value).
4. To set the hysteresis value, input the desired value in the Hysteresis field.
Note The hysteresis value set for the comparator function is also used by the
top/valley hold function.
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