Kübler CODIX 555, Manual, Page: 53 / 124

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55..55..11..44 A Alla arrm m 11 H Hyysstte erre essiiss
Here hysteresis means: The difference in
thresholds between switching on and
switching off. This difference should be
selected large enough to avoid undesired
switching actions at the output due to the
variations of the current instantaneous value.
N
No otte e::
Alarm value and hysteresis are always
based on the displayed current value and
not on the input signal value.
FFo orr p po ossiittiivve e a alla arrm m vva allu ue e::
Switching on hysteresis Switching off hysteresis
Positive
alarm
Output
Switching on value = alarm + switching on hysteresis
∆
a
Switching off value = alarm – switching off hysteresis
∆
b
The switching on value m mu usstt b be e g grre ea atte err than the switching off value.
FFo orr n ne eg ga attiivve e a alla arrm m vva allu ue e::
Switching on
hysteresis
Switching off
hysteresis
Negative
alarm
Output
Switching on value = alarm – switching on hysteresis
∆
a
Switching off value = alarm + switching off hysteresis
∆
b
The switching on absolute value (numerical value without sign)
m
mu usstt b be e g grre ea atte err than the absolute value for switching off.
Current
value
english
Current
value