Behaviour With Bus Voltage Failure, Recovery, Download And Ets Reset - ABB i-bus KNX Product Manual

®
ABB i-bus KNX
4.9 Behaviour with bus
voltage failure, recovery,
download and ETS reset
© 2008 ABB STOTZ-KONTAKT GmbH
Planning and application
Reaction on bus voltage failure
The switching behaviour (relay position) can be parameterised. The control
output assumes a high resistance state, i.e. that the ballasts assume the
maximum brightness (100 %).
Reaction on bus voltage recovery
The behaviour of the device after bus voltage recovery can be
parameterised for each output, see parameter window
It is possible to write the object Switch with a 1 or 0 or to restore
the state of the bus voltage failure.
An initialisation phase lasting about two seconds occurs directly after bus
voltage recovery. Thereafter, the following communication objects send their
current values :
Object/Function
In operation
Status function
Switch/Status or Status
switch
Status brightness value
Forced operation
Block
Warning staircase
lighting
Brightness value of
slave
Status byte
The additional functions behave as follows:
The behaviour of the additional function Slave mode in lighting control is
parameterised after bus voltage recovery in the parameter window
It is possible to activate slave mode, i.e. the slave ready object Brightness
value of slave and sets the respective brightness. With inactive the values
received via the object Brightness value of slave are not executed.
The additional function Staircase light and Light control are always activated
after bus voltage recovery (bit 0 in status byte has the value 1).
If Permanent ON was active before bus voltage failure, Permanent ON will
be rescinded with bus voltage recovery. The additional function is again
enabled and reacts to incoming telegrams.
Via the parameter Value of object "Switch" on bus voltage recovery in the
parameter window
X: General
on (staircase light or light control running) or switches off (operating on the
basis brightness / or does not control). If the parameter restore status before
failure is selected, the value of the object Switch before bus voltage failure is
written again to the object Switch after bus voltage recovery and the function
complying to the value is undertaken.
Name Remark:
General Is sent
General Is sent
Output X Is sent
Output X Is sent
Output X Information is displayed via the status byte
Output X Information is displayed via the status byte
Output X Is sent
Output X Is sent
Output X Is sent
you can also define whether the light switches
X: General.
X: Slave.
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