ABB i-bus KNX Product Manual page 37

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ABB i-bus KNX
Commissioning
Dimming speed, time for 0...100 %
(Function „Relative dimming")
Options:
This dimming time only affects DIM telegrams, which are received for the DGN/S via the central communi-
cation object Relative dimming for the DALI output.
Note
The following must be observed when selecting the dimming times: Depending on the lighting equip-
ment involved, staged dimming can occur with fast dimming speeds and low dimming times. The cause
of this is that dimming steps are defined in the DALI standard in order to achieve a logarithmic dimming
curve, which appears as a linear response to the human eye.
With the central function, the defined dimming thresholds (minimal/maximum brightness value) in
Parameter window Gx
minimum dim value is less than the possible physical dim value of the DALI equipment, this device is
automatically set to the lowest possible physical dim value (background brightness).
During the activated function Burn-in, the lamps are switched on with 100 % brightness independently of
the central DIM telegrams and set brightness values.
Dim period to reach set brightness value
(Function "Set brightness value")
Options:
This parameter determines the time duration in which the DGN/S sets the received brightness value for all
DALI equipment on the DALI output via the communication objects Brightness value or Brightness va-
lue/status.
jump to: All devices on the DALI output immediately switch ON with the received brightness value.
0.7 s...90 s: During this time, the lighting group is dimmed down to the received brightness value.
0.7 s
...
5.5 s
...
90 s
Group, page 51, continue to apply as thresholds for the individual group. If the
jump to
0,7 s
2 s
...
90 s
DGN/S 1.16.1 | 2CDC 507 114 D0201 35