ABB i-bus KNX Product Manual page 82


ABB i-bus KNX
Commissioning
Reaction on ballast power on
(ballast supply voltage recovery)
Options:
This parameter determines the response of the DALI device (ballast) at ballast supply voltage recovery. A
storage location is provided in the DALI device (ballast) for this purpose. The brightness value used by the
DALI device (ballast) at ballast supply voltage recovery to switch on the lamp is stored at this memory
location.
The brightness value of the DALI device (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 DALI device (ballast) is switched on and off normally via the operating voltage of the
ballast. This can be useful particularly 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.
However under "normal" operation this behavior can prove to be a disadvantage: at ballast operating
voltage failure and ballast supply 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 supply voltage recovery,
the parameter can be used to set any brightness value between 0 % (OFF) and 100 % (maximum
brightness value) or the previous brightness value before failure.

100 % (255)...0 % (OFF): This is the brightness value used to switch on the DALI device (ballast)
independently after ballast supply voltage recovery.

previous value: The DALI device (ballast) is switched on with the last (previous) set brightness value
used before ballast voltage failure. This function must be supported by the DALI devices. Since the
end of 2009 this property has been defined in the standard for DALI devices. Please contact the
ballast manufacturer in case of doubt.
Note
The factory default setting of the ballast is changed with this parameter (power on level).
80 2CDC507128D0202 | DLR/A 4.8.1.1
previous value
100 % (255)
99 % (252)
...
1 % (3)
0 % (OFF)