Timed Progression Of The Staircase Lighting Function - ABB i-bus KNX Product Manual

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ABB i-bus KNX
Planning and application
4.6.2

Timed progression of the staircase lighting function

The DALI gateways feature the additional function Staircase lighting. This can be independently
parametrized for each ballast and group. As the function is identical for groups and ballasts, only the group
function is described below. Group can be substituted with ballast.
The additional function Staircase lighting is parametrized in the Group x/Staircase lighting parameter
window, which is visible if the Enable additional function parameter in the Group x parameter window is set
to Staircase lighting. The time sequence can involve two-stage switch off.
If the Activate fct Staircase lighting function is e.g. deactivated via the Activate fct Staircase lighting/Status
group object (telegram with the value 0), the group reacts like a "normal" group that can be switched on
and off via the Switch group object. The group behaves like a normal DALI device without a time
sequence.
If the Staircase lighting function is activated there are two possible operating states:
Additional function is in standby mode: The additional function is active but has been interrupted, e.g.
by an OFF telegram or the time sequence has elapsed and in the off state (turn off value or OFF). The
group is in standby mode. The additional function is retriggered by an ON telegram (a telegram on the
Switch group object).
Additional function is running: The additional function Staircase lighting has been triggered and is
counting down the parametrized time sequence. The basic brightness, which can also have an indefinite
runtime, is part of the ongoing operation.
The staircase lighting timing for the individual groups is controlled by the gateway. Unlike the previous
gateways, no scenes are used. So the time sequence can only run correctly if the gateway and group can
communicate with each other via DALI. The reaction on DALI failure (communication fault) can be defined
in the Group x Fault parameter window. In the event of a fault, the group adopts a fixed parametrizable
brightness value. After DALI recovery the group is in standby and can be retriggered if communication has
been re-established between the ballast and the gateway.
During the staircase lighting sequence, the maximum brightness/minimal dimming values (dimming
thresholds) defined in the Group x parameter window apply.
The staircase lighting sequence is graphically represented in the following illustration:
224 2CDC507164D0201 | DG/S x.64.1.1