Preventing Output Chattering - Omron K3HB-C User Manual

Section 5 Functions and Operations

5.11 Preventing Output Chattering

Chattering of a comparative output results from drift in the measurement value near a comparative set
value. Chattering can be prevented by adjusting the hysteresis value.
Explanation of Functions
Hysteresis is a range between the value for which a comparative output turns ON and the value for which
the comparative output turns OFF. When the comparative output turns ON, it turns OFF only after the
change in measurement values is greater than the set hysteresis.
Comparative
set value
(when hysteresis is not used)
(when hysteresis is used)
Hysteresis works in the direction of decreasing measurement values for comparative set values HH and H
and works in the direction of increasing measurement values for comparative set values LL and L. Note
that hysteresis works in the direction of decreasing measurement values for all set values if the output
pattern is set to a level output.
Comparative
set vaLue HH/H
Comparative
set value LL/L
Output HH/H
Output LL/L
5-42
Hysteresis
Comparative set value
Measurement
value
Measurement
value
Comparative outputs
Comparative outputs
Advanced function setting level
Hysteresis
width
Chattering removed
Hysteresis
Hysteresis
R