Order No. 2104 ..
4.2.4.2.6 Function"Value transmitter 1 byte / 2 byte"
For each input whose function is set to "Value transmitter", the ETS indicates either a 1-byte or
a 2-byte object. The data format of the value object is dependent on the set function of the value
transmitter. The "Function as" defines the function on one of the following value transmitter
applications...
-
Dimming value transmitter (1-byte),
-
Temperature value transmitter (2-byte),
-
Brightness value transmitter (2-byte),
-
Light scene extension without memory function (1-byte),
-
Light scene extension with memory function (1-byte).
The dimming value transmitter, temperature and brightness value transmitter different in data
format and in the range of values. The independent function of the light scene extension is
special and is described (see page 51).
Dimming value transmitter, temperature and brightness value transmitter
In the function as a dimming value transmitter, the input can transmitted unformatted integers in
the range 0 ... 255 to the bus. As a brightness value transmitter, the input transmits formatted
floating point values in the range 0 … 1500 Lux and, as a temperature value transmitter, in the
range 0 … 40 °C. Table 1 shows a summary of the value ranges of the value encoders. The
values to be transmitted are configured in the ETS and can be adjusted later during device
operation (see value adjustment below).
The edge evaluation of the device means that it can transmit values only on a rising edge, only
on a falling edge or on a rising and falling edge. In this way, it is possible to make adjustments
to the contact connected at the input (push-button as NC contact or NO contact and switch).
Value transmitter type
Function
Lower numerical
limit
Upper numerical
limit
Dimming value transmitter
0 ... 255
0
255
Temperature value
transmitter
Temperature
value
0 °C
40 °C
Brightness value transmitter
Brightness value
0 lux
1.500 lux
Table 1: Value ranges of dimming value transmitter, temperature and brightness value
transmitter
Value adjustment for dimming value transmitter, temperature and brightness value transmitter
In the dimming value transmitter and temperature and brightness value transmitter, an
adjustment of the value to be transmitted during device operation can be configured. A value
adjustment can only be configurable in the ETS when the value is to be transmitted only on a
rising edge or only on a falling edge, i.e. a push-button is connected to the input.
A value adjustment is introduced by a long signal at the input (> 5 s) and continues for as long
as the signal is detected as active, i.e. the push-button is actuated. With the first adjustment
after commissioning, the value programmed by the ETS is increased cyclically by the step width
configured for the dimming value transmitter and transmitted. The step width of the
temperature value transmitter (1K) and the brightness value transmitter (50 Lux) is permanently
defined. The previously transmitted value is saved after releasing the pushbutton. The next long
pushbutton actuation adjusts the saved value and the direction of the value adjustment
changes.
The time between two telegrams on adjusting values can be configured in the ETS.
Example of value adjustment (Figure 10):
- Function as dimming value transmitter
Page 49 of 171
Software "KNX CO2 sensor"
Functional description
