Technical Manual
Blind Push Button Smart 55
BE-JTA5504.01
MDT technologies GmbH •
51766 Engelskirchen • Papiermühle 1
Phone: +49-2263-
880 • Fax: +49-2263-4588 • knx@mdt.de • www.mdt.de
20
20
Control of display brightness via object => „
active via percent values (%)
“
Brightness at start
0 – 100%
[100%]
Setting the brightness value when
starting the unit
The following parameters are available for each setting under "Control of display brightness via
objects":
Dim display after time
not active
only Night
Day / Night
Setting whether and when the
brightness on the display should
be dimmed down
Brightness
0 – 100%
[0%]
Setting of the value to be
dimmed to after the expiry time.
Available if "Dim display after
time" is active.
Expiration time
0 … 240 s
[20 s]
Setting of the time when
dimming should take place after
the last operation on the unit.
Available if "Dim display after
time" is active.
Table 10: Settings – Display: Representation and Brightness
Background colour
This setting affects the basic representation on the display. If "white" is selected, the background is
light and the writing is dark. If "black" is selected, the background is black and the writing is light.
Colour mode
The colour mode determines whether the fonts and symbols are displayed in colour or only in black
and white..
Behaviour on presence
Here the display can be switched on and off via "Object 35 - Presence". The display is switched on
with a "1" telegram and switched off with a "0" telegram. This setting is fixed and cannot be changed.
A possible application would be control via a motion detector which switches the display on when
presence is detected in the room and switches it off again after the follow-up time has elapsed.
Control of display brightness via object
On the one hand, the brightness can be defined via fixed values (percentage values). These are then
not changeable. On the other hand, the brightness can be set "dynamically" via brightness values (lux
values). These possibilities are as follows:
Control via percent values (%)
A percentage value is sent to the button via "Object 37 - Display brightness". The display
brightness is set accordingly. The parameter "
Brightness at start
" defines the brightness value that
the unit assumes after a restart. This remains valid until the first time another value is received via
object 37.
Control via brightness values (Lux)
The parameter "
Ambient brightness for 100%
" defines the basic range at which lux value the
display has its full brightness.
"
Minimum brightness Day/Night
" defines the brightness at which the display shows a received
brightness value of 0 lux.
If the parameter "
Switch off display
" is active, "
Ambient brightness for switch off
" can be used to
set whether the display switches off completely when the brightness falls below a certain level. Via
"
Ambient brightness for restarting
" you can set whether the display switches on again when the
brightness exceeds a certain level.