39
ABB i-bus
®
KNX
This means that the ON/OFF value is not achieved at the same time but
there is no unnecessarily long delay until a lamp switches from e.g. 30%
brightness to the OFF state.
Setting brightness value turns channel on:
If it should be possible to
switch on from the OFF state via a dimming command “Set Brightness
Value”, this must be enabled with the setting “yes”.
Dimming period to reach set brightness value (Object: Set Brightness
Value):
This parameter indicates the period in which a dimming process is
carried out from 0% to the starting value. This dimming period only affects
dimming commands which are received via the communication object
“Set Brightness Value”.
Dimming speed, time for 0...100% (Object: Relative Dimming):
This para-
meter indicates the time for carrying out a dimming process from 0...100%.
This dimming time only affects dimming commands which are received via
the communication object “Relative Dimming”.
When selecting all the dimming periods, the following should be
noted: depending on the lamp, stepwise dimming can occur when
the dimming speeds are too fast or the dimming times are too
short. The reason for this is that the dimming steps are defined in
the norm in order to achieve a logarithmic dimming curve which
appears as linear to the human eye.
Project design and programming