8-Bit Lightscene - ABB i-bus EIB Product Manual

®
ABB i-bus EIB / KNX
3.3

8-bit lightscene

© 2004 ABB STOTZ-KONTAKT GmbH
Planning and application
Special function: Restore state
A useful special function can also be assigned to preset1 and preset3, which
is used to recreate the brightness level which was present before retrieving
preset2 or preset4. The following diagram clarifies this:
Old state
Retrieve preset
(e.g. Preset2)
Restore old state
(e.g. Preset1)
Fig. 6: Restoring the old brightness state
This function can be used for example after a presentation to restore the
lighting to the state it was in beforehand.
Retrieve scene no. <xx>
Short push
button action
0%
Actuator 1
Fig. 7: Retrieve scene, 8-bit scene
In the 8-bit scene, the push button gives the actuator the instruction to
retrieve a scene. The scene is not stored in the push button but in the
actuator. All the actuators are addressed via the same group address. A
single telegram is sufficient to retrieve the scene.
A scene number is sent in the telegram value which must match the scene
number in the parameters of the actuator.
Up to 64 different scenes are managed via a single group address. An 8-bit
scene telegram contains the following information:
- Number of the scene (1...64)
- Retrieve scene / store scene
After a long push button action, the actuators receive a save command
which causes them to store the current value issued by the actuator as a
new scene value.
Actuator 1 Actuator 2
50% 0%
0% 50%
50% 0%
100%
Actuator 2
Actuator 3
100%
50%
100%
70%
Actuator 3
15