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ABB i-bus KNX
4.4
Behaviour with, ...
4.4.1
Bus voltage recovery
© 2010 ABB STOTZ-KONTAKT GmbH
Planning and application
General
At bus voltage recovery the object values can be parameterised,
if not they are set to the value 0.
For exceptions see the
Timers are out of operation and should be restarted.
Status objects are sent as long as the option after a change has been
set.
The contact position is not known with 100 % certainty after bus voltage
recovery. It is assumed that the contact position has not changed during
the bus failure (no manual operation possibilities). Only after a new
switch event is the contact position known to the Fan Coil Actuator.
The send delay is only active at bus voltage recovery!
Switch contact output
The object value Staircase lighting time remains unchanged as before
bus voltage failure.
The object value Disable function time is independent of the selected
option.
The object value Permanent ON remains unchanged as before bus
voltage failure.
The switch contact output switches as follows:
After the set object value Switch with bus voltage recovery.
Is the parameter Object value "Switch" at bus voltage recovery
is not parameterised, the behaviour at bus voltage failure is
decisive.
If none of the two above options is selected, the last position
is retained as with bus voltage failure.
Note
If a staircase lighting time was active at bus voltage failure, it will restart.
Inputs
The inactive waiting time is only active at bus voltage recovery.
Table
on page 149, e.g. automatic operation.
145
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