Omron DRT2 SERIES DEVICENET SLAVES - OPERATION MANUAL 04-2008 Operation Manual page 441

Temperature Input Terminals
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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).
Note When setting the hysteresis value, adjust for each input's decimal
point position or the 1/100 display mode if the 1/100 display mode is
being used. Always correct the hysteresis value after changing the
display mode setting or replacing the sensor with a sensor that has
a different decimal point position.
Example hysteresis value settings for 10 ° C:
a) R thermocouple (normal display) setting: 0010 decimal
b) T thermocouple (normal display) setting: 0100 decimal
c) Setting for any input with 1/100 display: 1000 decimal
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.
Section 7-6