ABB i-bus EIB Product Manual page 170

®
ABB i-bus EIB / KNX
© 2006 ABB STOTZ-KONTAKT GmbH
Commissioning
Option: A< >B (hysteresis)
The entry A< >B (hysteresis) means that the group is only triggered if the
trigger value is first located in Range A and the last triggering is carried out
by a value in Range B or if the trigger value is first located in Range B and
the last triggering is carried out by a value in Range A.
If the group was last triggered by the transmission of a value in Range A,
e.g. 21 °C (the group is thereby activated e.g. to switch on the heating) and
then values outside Range A have been transferred e.g. 23 °C followed by
another value in Range A such as 21 °C, the group is no longer triggered by
this value. The group can only be retriggered if a value is transmitted which
lies in Range B i.e. above 24 °C (the group is thereby deactivated e.g. to
switch off the heating).
Fig. 159: Example: Hysteresis, Group activated/deactivated
170