ABB i-bus KNX Product Manual page 69

®
ABB i-bus KNX
Commissioning
max. brightness value (100 %): The lighting group is switched on or dimmed with the maximum
brightness value.
min. brightness value (1 %): The lighting group is switched on or dimmed with the minimum brightness
value.
OFF (0 %): The lighting group is switched off.
Note
The minimum and maximum dimming values (dimming thresholds) still remain valid.
Scenes, staircase lighting, sequences as well as dimming processes are interrupted. The states of the
timer functions after a DALI voltage recovery or after a gateway supply voltage recovery is to be set
separately in the respective parameter windows of the additional function.
The ballast operating voltage is a prerequisite for correct response of the DALI equipment, e.g. ballast.
Brightness value when ballast power on
(Ballast supply voltage recovery)
Options:
This parameter determines the response of the ballast at ballast operating voltage recovery. A storage lo-
cation is provided in the ballast for this purpose. The brightness value used by the ballast at ballast operat-
ing voltage recovery to switch on the lamp is stored at this memory location.
The brightness value of the ballast is set as a factory default value to the maximum brightness (100 %).
This has the advantage that without any DALI programming or commissioning requirement, the ballast
equipment is switched on and off normally via the operating voltage of the ballast. This can be useful par-
ticularly during commissioning. Should no DALI commissioning have been undertaken, the lighting can be
switched on and off via the operating voltage of the ballast using a normal miniature circuit-breaker.
In "normal" operation, this reaction may not be desirable: At ballast operating voltage failure and ballast
operating voltage recovery, all ballasts switch on with the maximum brightness. This can lead to increased
inrush current and in the worst case can cause a circuit-breaker to trip. Moreover, the entire building is fully
illuminated and must be switched off manually.
In order to allow the user to set the default factory switch on response with ballast operating voltage re-
covery, the parameter can be used to set any brightness value between 0 % (OFF) and 100 % maximum
brightness value.
100 % (255)...0 % (OFF): This is the brightness value used to switch on the ballast device after ballast
operating voltage recovery.
Important
The factory default setting of the ballast is changed with this parameter.
Interaction between ballast power on and DALI voltage recovery
The power-on level of the ballast is set first of all after ballast operating voltage recovery. This
brightness value is stored in the ballast and is thus set immediately after the ballast operating volt-
age recovery. Simultaneously, the DGN/S on the DALI will once again receive responses from the
ballast. As a result, the DGN/S informs the re-detected ballast again about the lighting group infor-
mation. After to this procedure, the lamps are controlled with the parameterizsed brightness level at
DALI voltage recovery.
100 % (255)
...
1 % (3)
0 % (OFF)
DGN/S 1.16.1 | 2CDC 507 114 D0201 67