K-BUS
®
KNX/EIB
Dimming Actuators
48
Supposing the low threshold is 50. If it is “Off”, it will switch off the luminaries when dim DOWN to 50; if it
is “To low threshold value”, the value of the luminaries will remain the same even when dimming DOWN to 50.
However, no matter whether it is “Off” or “To low threshold value”, if the low threshold of the relative dimming
is smaller than that of the brightness, it will switch off the luminaries automatically when dimming DOWN to the
low threshold of the brightness value; if the high threshold of the brightness is less than relative high threshold, it
is only possible to dim UP to the high threshold of the brightness. (The high and low threshold value will limit the
total brightness value of the dimmer, see more details in the below description.)
Parameter “Output switch on after receipt of dimming up telegram”
It tells that whether it is possible to switch on the luminaries when receiving the “
dimming up
” message from
relative dimming if the output is 0.Options:
No
Yes
Supposing the current output is 0. If it is “No”, the output still remains 0 even when the target receives the
message “dimming UP”; if it is “Yes”, it will dim the luminaries to the modified value when receiving the
“dimming up” message. If the value after dimming up is smaller than the brightness low threshold, it will be
dimmed to the low threshold directly. If the value after dimming up is greater than the brightness high threshold, it
will be dimmed to the high threshold directly.
Brightness Value
The high and low threshold value limits the high and low output value. It is not allowed to change the
brightness value if it is beyond the high and low threshold which will be invalid. For example, in Fig. 6.5 the
value is set as 1~255. If the low threshold value is set as 50 and the high threshold is 200, the brightness value
“210” will be invalid. The luminaries will be dimmed from the low threshold directly when the brightness value
goes up from 0; the luminaries will be dimmed from the high threshold directly when the brightness values goes
down from 255.
Parameter “low dimming threshold 1...127
（
0.4%...49.9%)”
This function defines the low threshold of the dimmer, and the range is 1~127. It is going to start dimming
from the low threshold. Supposing the current brightness value is 0; the low threshold is 50 and the high threshold
is 200. If receiving the message “30”, the brightness value will go to 50 directly without gradual change; if
receiving the message “60”, so the brightness value will first go to 50 and then go up to 60 gradually; if the
current value is 100 and the target value is 30, so the value will go from 100 to 50 and the brightness value is 50.
Parameter “upper dimming threshold 128...255
（
50.2%...100%)”
This function defines the high threshold of the dimmer, and the range is 128~255. Supposing the low
threshold is 50, and the high threshold is 200. If the input brightness value is greater than 200, it will go to 200
directly.
