ABB i-bus KNX Product Manual page 81

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ABB i-bus KNX
Commissioning
Selected dimming curve
Options:
The dimming curve is the basis for the logarithmic DALI characteristic. You can define whether the KNX
setpoint and KNX status value refer to the DALI control value (x-axis) or luminous flux (y-axis).
•
DALI: The KNX value refers to the DALI control value (logarithmic).
•
KNX: The KNX value refers to the luminous flux (linear).
For more information on dimming curves, see 4.5. DALI dimming curve, p. 219.
Minimal dimming value
Options:
This parameter defines the minimal dimming value adopted by the ballast or group. This value is stored in
the DALI devices and thus applies for all functions. If the defined minimal dimming value exceeds the
maximum brightness value, the DG/S sets it at the maximum.
If the Burn-in lamps function is activated, the group or ballast is operated at 0% (OFF) or 100% brightness,
regardless of the minimal dimming/maximum brightness setting.
If a brightness value below the defined minimal dimming value is received via one of the Brightness value
group objects, the minimum value is adopted.
The minimal dimming value also applies with dimming and with the Staircase lighting, Slave and Scenes
functions.
The DALI output itself has no separate minimal dimming value. The minimal dimming values defined for
the group or ballast apply.
Note
When setting brightness values in the individual gateway functions, make sure that they are actually
feasible in relation to the basic settings made here for minimal dimming/maximum brightness value. The
same applies to the forced operation brightness values and to the parameters set in the Fault parameter
window, such as Power-On Level.
Important
The DALI output itself has no separate minimal dimming value. The minimal dimming/maximum
brightness values defined for the group or ballast remain applicable even on receipt of a central
telegram via the Output x group objects.
Example: Group 1 is assigned a minimal dimming value of 20%, Group 2 10% and a ballast, 15%. If the
DG/S receives a central telegram Set brightness value at 5% in this configuration, these group and
ballast settings will not change.
DALI (logarithmic)
KNX (linear)
100% (255)
99% (252)
...
1% (3)
DG/S x.64.1.1 | 2CDC507164D0201 79