YOKOGAWA YS1000 Series, User Manual

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1-5
IM 01B08D02-02EN
Input/output and
Auxiliary Function
1 1.4 Setting Alarm Output Hysteresis
Description
Setting hysteresis (differential gap) to alarm action prevents chattering in digital output.
PV
Closed Open
Closed
For an example in the figure above, the contact type is such that the contact
opens if an event occurs (factory default).
Alarm hysteresis (HYSn)
Alarm hysteresis (HYSn)
Open
Time
High limit alarm setpoint for PV
Low limit alarm setpoint for PV
High limit alarm output for PV
Low limit alarm output for PV
0213E.ai
Setting Details
Parameter Name Setting Range Display Transition and Display Title
HYS1, HYS2 Alarm hysteresis
Equivalent to 0.0
to 20.0% in the
engineering unit
Tuning Display > [ SETTING1 ] (Setting
Display 1) or [ SETTING2 ] (Setting
Display 2)
The HYS2 parameter is used for the loop 2.