Slave With Offset Function - ABB i-bus KNX Product Manual

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ABB i-bus KNX
Planning and application
4.11.1

Slave with offset function

The DALI Light Controller features, in addition to the additional function Slave, an offset with the slave that
can be used to control a lower or higher level of brightness than the brightness level of the master. In the
following, both these functions should be described in more detail using a room with two lighting strips as
an example.
Using the additional function Slave, a second lighting strip (slave) can be controlled in the room. Up to
now, both lighting strips were normally controlled with the same brightness value.
With the DALI Light Controller, the transfer of the master/slave brightness value can be via a
communication object (Brightness value of slave of group x) or directly internally in the DALI Light
Controller. The bus loading is minimized by internal communication. This parameterization is undertaken in
the Parameter window - Gx
Daylight lights the area of the room near the window more than the rear area of the room. To light the rear
area of the room adequately, Strip 1 must produce a brightness value x. Owing to the daylight, Strip 2
could be controlled with a lower brightness value (x - x %) without the room being too dark.
In the DALI Light Controller, an offset is available for this behavior for every light controller lighting group.
This parameterization is undertaken in the
parameter for the offset is visible if the parameter Light controller controls as "master" other dimmer
actuators is set to yes. A percentage value x can be parameterized as an offset. The slave is controlled
with a brightness value X % brighter or darker than the master.
Slave, page 108.
Parameter window - Gx Light controller, page 95. The
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