In general device parameters define which Group Objects of the device are available on the KNX network, they also allow to fine-tune the behavior of the device on the bus.
Consider the following example: a push button, with one rocker and which can support three building functions: switching, dimming and blinds.
The function of the rocker is defined by a parameter called 'function', setting this parameter is done via the device parameter dialog in ETS.
If the 'function' parameter is set to switching, then 'object nr. 0 - switching - 1 bit' is made available for this device in ETS.
If the 'function' parameter is set to dimming, then 'object nr. 1 - switching - 1 bit' & 'object nr. 2 - relative dimming - 4 bit' + the extra parameters 'dimming long push time out' & 'dimming step' are made available for this device in ETS.
If the 'function' parameter is set to blinds, then 'object nr. 3 - move up/down - 1 bit' & 'object nr. 4 - step/stop - 1 bit' + the extra parameter 'move long push time out' are made available for this device in ETS.
Overview
1) function parameter = switching
Available object:
- object nr. 0 - switching - 1 bit
2) function parameter = dimming
Available objects & parameters:
- object nr. 1 - switching - 1 bit
- object nr. 2 - relative dimming - 4 bit
- parameter 'dimming long push time out
- parameter 'dimming step
3) function parameter = blinds
Available objects & parameters:
- object nr. 3 - move up/down - 1 bit
- object nr. 4 - step/stop - 1 bit
- parameter 'move long push time out