ABB i-bus
KNX
Planning and application
SA/S | 2CDC 505 056 D0208 157
Up to 64 different scenes are managed via a single group address. The scene telegram contains the recall
or store functions of a scene.
The scene function which controls multiple KNX devices is described below.
With Scene it is possible to retrieve one of 64 scenes or to connect multiple KNX devices in a scene. The
scene can be retrieved or stored using a single telegram. It is a prerequisite that all the operating devices
are parameterized with the same scene number.
Each KNX device involved receives the scene telegram and independently controls the scene values. Via
the Switch Actuator, for example, the outputs are switched on or off, the blind actuator moves the blind to a
defined position, and the DALI gateway dims its output to the pre-programmed brightness values.
Up to 64 different scenes can be managed via a single KNX group address. The following information is
contained in a scene telegram:
•
Number of the scene (1…64)
•
Recall scene / store scene
For further information see:
Code table, 8 bit scene
, p. 171
Benefits
The
Scene
function on ABB i-bus
®
devices offers the following decisive advantage:
All settings to be undertaken in a scene are stored in the device. Therefore, they need not be sent via
KNX with a scene recall – all that is required is a numeric value which has been assigned to the scene.
This considerably reduces the load on the bus and prevents unnecessary telegram traffic via KNX.
A typical
Scene
function might be as follows and is described using the 8 bit scene telegram as an
example:
The task is to implement the room lighting for a presentation with ABB i-bus
®
devices. The following
devices are used in the room:
•
Switch actuator for the basis lighting
•
Blind actuator for shading
•
DG/S (DALI Gateway) for dimmable lighting
•
1-
10 V light controller for brightness detection and constant lighting control
Summary of Contents for i-bus SA/S 2.6.2.1
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