Measured value
Limit value
transgression
Upper
limit value
"Hysteresis"
t
t
"Hysteresis“
Lower
limit value
A0009_GB
Fig. 85: Hysteresis
If the relays are defined as limit value relays, then when a limit value transgression
occurs they also will switch in addition to the alarm relay.
Different switch on-delays (∆t On) and Switch off delays (∆t Off) can be set for the limit
value relays for
[Limit 1]
and
[Limit 2]
. These prevent the limit value relay from switching
back and forward if the limit values is only exceeded for a short time (damping function).
If there are no limit value relays, the limit values can nevertheless be entered. The con‐
troller displays the reactions described when a limit value transgression occurs
Limit value relay used as an actuator
If the relays are defined as actuators, then they react like actuating outputs. Example: in
the event of Pause being activated or in the event of an alarm, an activated limit value
relay will be deactivated.
11.2 Setting limit value channel 1
Continuous display ➨
➨ or
[Limit values]
➨
[Limit values]
➨ or
[Limit value channel 1]
➨
[Limit value channel 1]
Setting the
[Limit values]
122
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