Technical Manual
–
Central Operation Unit Smart
MDT technologies GmbH •
51766 Engelskirchen • Papiermühle 1
Phone: +49-2263-
880 • Fax: +49-2263-4588 • [email protected] • www.mdt.de
25
25
The Central Operation Unit Smart has an internal brightness sensor and can adjust the display
brightness dynamically to the environment. The parameter "brightness" influences the dimming
behavior and the threshold from when the display is dimmed. The parameter for the minimum
brightness defines the absolutely lowest threshold up to which the display is dimmed.
In the programmed state, the menu for the brightness adjustment can be called up by pressing the
sensor surfaces 7 and 8 simultaneously:
In this menu the end user has the possibility to adjust the brightness settings independently (without
ETS). The settings are stored permanently in the device until the next transfer of the database.
If the parameter „
Adapt display brightness to ambience
“ is set to “Yes”, the following adjustments
are available:
Brightness:
Defines the basic brightness of the display and influences the dimming behavior
of the display according to the measured value for the ambient brightness.
min. Brightness:
Defines the minimum brightness at darkness. In day mode, the adjustment
for the day mode is set and in night mode the adjustments for the night mode is set.
If the
parameter „
Adapt display brightness to ambience
“ is set to “No”, the following adjustments
are available:
Brightness:
Defines the absolute, fixed brightness. In day mode, the adjustment for the day
mode is set and in night mode the adjustments for the night mode is set.
Control of the display brightness over bus
: A central operating unit can be set as master and
send its brightness value to the bus. The operating units in slave mode then receive the time
and adjust their display brightness accordingly. Control via another KNX device is also
possible
The following communications objects are available:
Number
Name
Length
Usage
122
Presence
1 Bit
Input for presence active, e.g. from presence
detector
124
Display Brightness
1 Byte
Receiving/sending the brightness for the
display
Table 16: Communication objects
–
Presence and Display brightness
