TMD-Display One
Technical Support:
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51
The “
state-dependent
” LED illumination mode is analogous as for the
Scaling Constant and Counter Constant functions.
Dimmer
: implements a one-button light control that sends orders to the KNX
bus, which can then be executed by light dimmers. These orders consist in:
Switch-on / Switch-off orders (on short presses).
Step dimming orders (on long presses) and the subsequent stop order
once the button is released.
Being a one-button control, the
switch orders will alternate
(on / off) for
every short press, and so will do the step dimming orders (increase /
decrease) for every long press. However, there are some exceptions to this
alternation:
On a long press: an increase dimming order will be sent if the last short
press caused a switch-off of the light, or if the current light level is found to
be 0%. On the other hand, a decrease order will be sent if the last short
press caused a switch-on or if it is found to be 100%.
On a short press: a switch-on order will be sent if the last long press
caused a decrease of the light level or if the current level is found to be
0%. On the other hand, a switch-off order will be sent if the last long press
caused an increase of the light level or if it is found to be 100%.
Note that the device considers that the
current light level
is the value of a
specific objected provided to be written from the KNX bus (i.e., to receive
feedback from the dimmer). During the device start-up after a download or a
bus failure, this object is set to value “50%” (the dimmer is expected to
refresh that value after bus failures).
Under a “
state-dependent
” LED illumination, the LED will remain on/off
according to the following:
After sending a switch-on order to the bus, the LED will turn on. After
sending a switch-off order to the bus, the LED will turn off.
After sending a dimming order greater than 0%, the LED will turn on. After
sending a dimming order equal to 0%, the LED will turn off.
