ACS-CONTROL-SYSTEM GmbH
l Lauterbachstr. 57 l D-84307 Eggenfelden l www.acs-controlsystem.de l [email protected]
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7. Alarms / Relays
This device has 4 virtual alarms that can monitor one limit value in regard of an undercut or exceedance.
Each alarm can be allocated to an optional relay output S1-S2; furthermore alarms can be controlled by
events like e.g. Hold or min/max-value.
Function principle of alarms / relays
Operating current / Quiescent current
Working principle
Broadness of the window between the switching thresholds
Hysteresis
Threshold / limit value of the change-over
Switching threshold
Deactivated, instantaneous value, min/max-value, hold-value, totaliser
value, sliding average value, constant value, difference between
instantaneous value and constant value or an activation via the digital
input
Alarm / Relay x
7. Alarms / Relays
Operating current
By operating current the alarm S1-S2 is
off
below the threshold and
on
on
reaching the threshold.
Quiescent current
By quiescent current the alarm S1-S2 is
on
below the threshold and switched
off
on reaching the threshold.
Switching-on delay
The switching-on delay is activated via
an alarm and e.g. switched 10 seconds
after reaching the switching threshold, a
short-term exceedance of the switching
value does not cause an alarm,
respectively does not cause a switching
operation of the relay. The switching-off
delay operates in the same way, keeps
the alarm / the relay switched longer for
the parameterised time.
