Scene Function - MDT AMI series Technical Manual

Technical Manual Switch Actuators AMI/AMS
4.4.4 Scene function
When functions of different groups (e.g. light, heating and shutter) shall be changed simultaneously
with only one keystroke, it is practical to use the scene function. By calling a scene, you can switch
the lights to a specific value, drive the shutter to an absolute position, switch the heating to the day
mode and switch the power supply of the sockets on. The telegrams of these functions can have as
well different formats as different values with different meaning (e.g. "0" for switch the lights off and
open the shutters). If there were no scene function, you would have to send a single telegram for
every actuator to get the same function.
The scene function of the switch actuator enables you to connect the channels of the switch actuator
to a scene control. For that, you have to assign the value to the appropriated space (scene A..H). It is
possible to program up to 8 scenes per switching output. When you activate the scene function at
the switching output, a new sub menu for the scenes appears at the left drop down menu. There are
settings to activate single scenes, set values and scene numbers and switch the memory function
on/off at this sub menu.
Scenes are activated by receiving their scene numbers at the communication object for the scenes. If
the memory function of the scenes is activated, the current value of the channel will be saved at the
called scene number.
The communication objects of the scenes have always the length of 1 byte.
The following illustration shows the setting options at the ETS‐Software for activating the scene
function:
Figure 16: Scene function
The following chart shows the relevant communication object:
Number Name
4 Scene
Table 21: Communication object scene
For calling a certain scene, you have to send the value for the scene to the communication object.
The value of the scene number is always one number less than the adjusted scene number. For
calling scene 1, you have to send a "0". So the scene numbers have the numbers from 1 to 64, but
the values for the scenes only from 0 to 63.
If you want to call scenes by a binary input or another KNX device, you have to set the same number
at the calling device as at the receiving device. The calling device, e.g. a binary input, sends
automatically the right value for calling the scene.
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Length Usage
1 Byte Call of the scene