ABB i-bus KNX Product Manual page 99

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ABB i-bus KNX
Commissioning
Brightness on KNX or DALI voltage
failure (DALI System Failure Level)
Options:
This parameter defines how the ballast or group ballasts react if the gateway cannot communicate via the
KNX due to a KNX voltage failure, or if there is a DALI voltage failure (e.g. a DALI short circuit or a
gateway supply voltage failure).
•
No change: The brightness of the ballast/group ballasts does not change. DALI devices that are
switched off remain off. The timer functions, e.g. Staircase lighting and Burn-in are discontinued.
•
Maximum brightness value (100%): The ballast/group ballasts switch on at or dim to the maximum
brightness value.
•
Min. brightness value (1%): The ballast/group ballasts switch on at or dim to the minimum brightness
value.
•
OFF: The ballast/group ballasts switch off.
Note
The factory default setting of the ballast is changed with this parameter (system failure level).
Note
Reaction between (ballast) power on and absent DALI voltage (interface failure/system failure)
According to the DALI standard, no exact priority has been defined between these two functions.
The reaction depends on when the ballast is ready to receive again and when it detects that there is
no DALI voltage. Both depend on the electronics and firmware of the ballast.
In most cases, the following behavior is expected:
After the ballast supply voltage is applied, the power-on level is started by the ballast. However, a few
hundred ms later, the ballast will detect that there is no DALI voltage. This in turn triggers the system
fault Level (no DALI voltage). Therefore visually, the user will only detect the system fault (the
parametrized reaction on a DALI voltage failure).
Maximum brightness value (100%)
Min. brightness value (1%)
OFF
No change
DG/S x.64.1.1 | 2CDC507164D0201 97