41
ABB i-bus
®
KNX
Project design and programming
Any values can be set for the starting, hold and switch OFF values. It is
therefore possible to implement very specific or special dimming processes
e.g. daylight simulation.
Initial brightness value when turned on:
This parameter indicates the
starting brightness value with which the DALI devices should switch on after
receipt of an ON telegram.
Brightness value when turned off:
This parameter indicates the final
brightness value which the DALI devices should have when they are
switched off i.e. at the end of the dimming progression.
Hold brightness value:
This parameter indicates the brightness value which
the DALI devices should adopt during the hold period.
Dimming period to reach hold brightness value:
This parameter indicates
the period during which the DALI devices should have modified their
brightness from the starting value to the hold dimming value.
Hold time:
This parameter indicates the period during which the DALI
devices should retain a constant brightness level (= hold dimming value).
Dimming period to reach brightness value before turned off:
This parameter indicates the period during which the DALI devices should
have modified their brightness from the hold dimming value to the switch
OFF value.
Behaviour on retriggering:
If a new trigger (telegram “Channel X - On / Off”) is carried out during phase
햲
, the dynamic function proceeds unchanged. In the event of an ON
telegram in phase
햳
, the hold time
햳
is restarted. An ON telegram “1” in
phase
햴
or
햵
causes phases
햳
and
햴
to restart.
In the event of an OFF telegram (“Channel X - On / Off” = “0”) in phase
햲
or
햳
, phase
햴
is started immediately. If an OFF telegram is received in phase
햴
or
햵
, the dynamic mode continues unchanged until the switch OFF value is
reached or it is retained.
An example of staircase lighting control is described in chapter 5.3
“Application and planning”.
Minimal brightness value:
The minimal brightness value which the DALI
device should adopt when dimming darker or setting brightness values is
defined via this parameter. The minimal brightness value is not considered
during the dynamic mode (e.g. staircase function). However the minimal
brightness value is almost active during the scene function. The technical
features defined in the “normal” mode are further more admissible.
Maximal brightness value:
The maximal brightness value which the DALI
device should adopt when dimming higher or setting brightness values is
defined via this parameter. The maximal brightness value is not considered
during the dynamic mode (e.g. staircase function). However the maximal
brightness value is almost active during the scene function. The technical
features defined in the “normal” mode are further more admissible.