Fault Addressed "Feedback" (No. 21) Code Table - ABB i-bus KNX Product Manual

®
ABB i-bus KNX
Appendix
A.3

Fault addressed "Feedback" (no. 21) code table

The 2-byte group object Fault addressed makes all the information about a ballast or group available on
the KNX. The same group object is used to request the information, see Fault addressed "Request" (no.
21) code table, p. 229.
For further information see: group object no. 21, p. 187.
The 2-byte Fault addressed group object can be subdivided into two 1-byte values: the Low byte (bit 0...7)
and the High byte (bit 8...15).
Initially, in the Low byte the information (device or group number) is repeated. The request bit (7) is set to
zero, which makes the telegram recognizable as a sent telegram.
The High byte contains the information about the selected DALI device or group.
The following code table shows the relationship between the value of the High byte group object and the
status of the DALI system and its ballast or group.
Bit
No.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
= Value 1, applicable

empty = value 0, not applicable
230 2CDC507164D0201 | DG/S x.64.1.1
7 6 5 4 3
00
01
02
03
04
05
06
07

08

09

0A

0B

0C

0D

0E

0F

10

11

12

13

14

15

16

17
 
18
 
19
 
1A
 
1B
 
1C
 
1D
 
1E
 
1F

20

21

22

23

24

25

26

27
Bit
2 1 0
No.
1 40

2 41

3 42
 
4 43

5 44
 
6 45
 
7 46
  
8 47
9 48

10 49

11 50
 
12 51

13 52
 
14 53
 
15 54
  
16 55
17 56

18 57

19 58
 
20 59

21 60
 
22 61
 
23 62
  
24 63
25 64

26 65

27 66
 
28 67

29 68
 
30 69
 
31 70
  
32 71
33 72

34 73

35 74
 
36 75

37 76
 
38 77
 
39 78
  
40 79
7 6 5 4 3
 
28
 
29
 
2A
 
2B
  
2C
  
2D
  
2E
  
2F
 
30
 
31
 
32
 
33
  
34
  
35
  
36
  
37
  
38
  
39
  
3A
  
3B
   
3C
   
3D
   
3E
   
3F

40

41

42

43
 
44
 
45
 
46
 
47
 
48
 
49
 
4A
 
4B
  
4C
  
4D
  
4E
  
4F
2 1 0
41

42

43
 
44
45

46

47
 
48
49

50

51
 
52
53

54

55
 
56
57

58

59
 
60
61

62

63
 
64
1

2

3
 
4
5

6

7
 
8
9

10

11
 
12
13

14

15
 
16