Omron K3HB-H - 5.16 Preventing Output Chattering

Functions and Operations
Section 5 Functions and Operations
5-46
5.16 Preventing Output Chattering
Chattering of a comparative output results from drift in the measurement value near the comparative set
value. Chattering can be prevented by adjusting the hysteresis value.
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.
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.
However, hysteresis works in the direction of decreasing measurement values for all set values if the
output pattern is set to a level output.
Advanced function setting level
X V S H
Explanation of Functions Hysteresis
Comparative set value
Comparative
set value
Measurement
value
Measurement
value
Chattering removed
Comparative outputs
(when hysteresis is not used)
Comparative outputs
(when hysteresis is used)
Hysteresis
width
Comparative
set vaLue HH/H
Comparative
set value LL/L
Output HH/H
Output LL/L
Hysteresis
Hysteresis