Characteristic Adjustment Of Phys-Min Dimming Value - ABB i-bus KNX Product Manual


ABB i-bus KNX
Planning and application
4.12.2

Characteristic adjustment of phys-min dimming value

In the ideal case, (ballast with a physical minimum brightness value of 0), the "normal"
table
With a realistic physical dimming value of 3% (DALI 126), the following table results. In the KNX value
range 0...50 %, the ballast cannot set a brightness difference.
E
D
C
B
A
The following table results with the characteristic adjustment Yes, linear dimming curve without phys-min
dimming value with a DALI device featuring a dimming range of 3...100 %:
E
D
C
B
A
*) Theoretically the value 1 is reported back. As the minimum dimming threshold in the DLR/S is 1 % (digital value 3), only
this value can be set and fed back.
The possible characteristics with the DALI Light Controller and the characteristic adjustment are
represented in the following illustration. A ballast with a minimum physical brightness value of 3 % has
been assumed.
198 2CDC 507 100 D0202 | DLR/S 8.16.1M
results, page 197, results.
KNX status
0 126
Brightness value
Luminous flux
0 3
[%]
DALI value 0 1
KNX value
0 1
KNX value [%]
0 0.4
KNX status
0
Brightness value
Luminous flux [%] 0
DALI value 0
KNX value 0
KNX value [%] 0
126 126 126 144 170
3 3 3 5 10
60 85 126 144 170
60 85 126 144 170
24 33 49 57 67
*)
3 8 26 51 77
1 3 4 6
85 126 138 151 164
3 8 26 51 77
1 3 10 20 30
195 210 220 229 235
20 30 40 50 60
195 210 220 229 235
195 210 220 229 235
77 82 86 90 92
102 128 153 179
9 12 17 25 35
177 190 203 215
102 128 153 179
40 50 60 70
DALI transformation
241 246 250 255
70 80 90 100
241 246 250 254
241 246 250 255
95 97 98 100
204 230 255
50 70 100
228 241 254
204 230 255
80 90 100