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Introduction: DALI standard
DALI Manual | 08-2013 | en
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Scene and group concept
DALI scenes
With DALI it is possible to store 16 different lighting scenarios in each DALI unit so that predefined lighting moods can
be called up for a room (for example the "presentation" scene in a conference room, or a "morning" scene in a
wellness centre). The values of the 16 scenes are stored in the control gear. As soon as the unit receives the
command "Go to scene 1" for example it fades up or down to the value stored in memory. The cross-fade time for the
scene call is also stored in the unit and can be set in steps between 0.7 and 90.5 seconds with the "Fade Time"
parameter.
Figure: Examples of light scenes
"Daytime showroom" scene "Night-time showroom" scene
DALI groups
With DALI it is possible to define 16 groups in a DALI circuit.
A group is a meaningful collection of luminaires. Group assignment can be edited in DALI. It is possible for one DALI
unit to belong to several groups. This reduces the amount of wiring needed and greatly increases flexibility compared
with non-addressable systems because in these systems the groupings are hard-wired.
½ CAUTION!
When the maximum cable length is calculated the contact resistance must also be taken into account.
A voltage drop of 2 V must not be exceeded!