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Art. No. SC 1000 KNX
4.2.4.1.17 Display illumination and operation LED
Display illumination
The device is equipped with a switchable display illumination. Depending on the required
installation location, it may be desirable for the display to be illuminated either permanently or
temporarily. The function of the display illumination can be defined in the ETS in the parameter
node "Display -> Display illumination". If the display illumination is switched off, the display can
no longer be read. Indicators and controls are then no longer present.
i
A switched off display illumination disables operation and display elements of the display.
Consequently, these elements are not operational if a display illumination is switched off.
The master button
W
, which is located outside the display, is independent of the display
illumination and disabling of display operating elements. Consequently, the master button
can also be operated with a dark display.
After programming with the ETS or after switching on the power supply (device reset), the
display illumination can be switched on or off. In this case, the parameter "Display illumination
after reset" defines the behaviour. With the "on" setting, the display illumination is switched on
after a device reset and switched of again automatically when the time specified by the
parameter "Automatic switch-off of display illumination" has elapsed and no additional influence
of the illumination occurs within this time (see parameter "Switch on display illumination").
In the setting "off", the display illumination is first switched off after a reset. The illumination can
then be switched on by events defined by the parameter "Switch on display illumination".
During ongoing operation of the device, the display illumination can be switched on or off
depending on different events. The parameter "Switch on display illumination" specifies the
behaviour of the illumination as follows...
-
Setting "only via display/button operation":
The display illumination is switched on by any touch operation of the display, sensor
buttons
V
,
U
and
W
or by an optionally available push-button extension module of the
button or rocker operation. The device switches off the illumination of the display
automatically again as soon as the delay time defined by the parameter "Automatic switch
off display illumination after" has elapsed. Each new operation of the device via the
aforementioned events restarts the delay time.
If the lighting is switched off, only the display illumination is switched on after touching the
touch surface the first time. No operating element located on the display surface will be
activated yet by this operation. Hence, no commands will be evaluated and transmitted to
the bus yet by the first operation for switching on the illumination. An operation on the
push-button extension module behaves different to this. An operation on the push-button
extension module switches the display illumination on and also directly affects the
execution of the configured push-button function.
-
Setting "only via switching object":
With this setting the display illumination can be activated via the 1-bit communication object
"Backlighting On/Off". The parameter "Behaviour of display illumination switching object"
determines which telegram polarity induces switching on or switching off. This parameter
also defines whether the illumination remains on or off by a bus telegram or whether the
display illumination switches itself again automatically after switching on. In the latter case,
the time specified by the parameter "Automatic switch-off of display illumination" defines
when the automatic shut-off takes place automatically after switching on by a bus telegram.
If no automatic switch off should take place by the switching object during activation of the
display illumination, the illumination stays on until it is switched off by the object.
-
Setting "only via display/button operation and switching object":
This setting is a combination of the options "only via display/button operation" and "only via
switching object". In this case, the illumination can be activated either via an operation on
the device or via the communication object "Backlighting On/Off". The most recent event
prevails and specifies the status of the display illumination.
Page 121 of 347
Software "Smart Control 501511"
Functional description