Gira DALI Gateway Product Documentation page 53

Setting the response to bus voltage failure
The "Response to bus voltage failure" parameter is created separately for each group in the "Groups -
[x] group name" parameter node (x = group number 1...32).
Set the parameter to "No change".
Following a bus voltage failure, the DALI devices of a group will not react and keep the current
brightness value or remain switched off.
Set the parameter to "Switch-off".
In case of bus voltage failure the group will be switched off.
Set the parameter to "Brightness value". Select the required brightness value in the selection field.
The group will be set to the brightness value specified in the selection field. The adjustable value
must be within the limits of the parameterized maximum and minimum brightness.
The DALI devices assigned to the group will behave according to the parameterized response to bus
voltage failure ("SystemFailureLevel") even in case of a voltage failure in the DALI line (e.g. short-
circuit, cable break, mains voltage failure only at the DALI Gateway).
The current states of the forced-control positions will also be stored in case of bus or mains voltage
failure so they can be resumed, if needed, after the return of bus and mains voltage (depends on the
parameterization of the forced-control position functions).
A bus voltage failure will always cause the deletion of active disable or forced-control position
functions rendering them inactive.
Setting the response to bus voltage return
The "Response to bus voltage return" parameter is created separately for each group in the "Groups -
[x] group name" parameter node (x = group number 1...32). The parameter also defines the behaviour
after mains voltage return.
Set the parameter to "No change".
Following a bus/ mains voltage failure, the DALI devices of a group will show no response and keep
the current brightness value or remain switched off.
Set the parameter to "Switch-off".
The group will be switched off in case of bus/mains voltage failure.
Set the parameter to "Brightness value as prior to bus voltage failure".
After bus/ mains voltage return, the brightness value that was internally stored last prior to the bus/
mains voltage failure is resumed.
Set the parameter to "Brightness value". Select the required brightness value in the selection field.
The group will be set to the brightness value specified in the selection field. The adjustable value
must be within the limits of the parameterized maximum and minimum brightness.
Best. Nr. 1060 00
"DALI Gateway C00CX2 EN / C00CX4 EN" software
Functional description
Page 53 of 136