6 Transfer protocol
KNX B4-UP button interface • Status: 24.08.16 • Technical Changes and Errors excepted.
3. Transfer protocol
3.1. List of all communications objects
Abbreviation flags:
C Communication
R Read
WWrite
T Transfer
UUpdate
No. Text Function Flags DPT type Size
0 Software version Readable R-CT [217.1] DPT_Version 2 bytes
1 Input 1 - Extended Input /
Output
RWCT [1.8] DPT_UpDown 1 bit
2 Input 1 - Short Output R-CT [1.10] DPT_Start 1 bit
3 Input 1 - Switching Input /
Output
RWCT [1.1] DPT_Switch 1 bit
4 Input 1 - Relative dimming Input /
Output
RWCT [3.7] DPT_Con-
trol_Dimming
4 bit
5 Input 1 - 8-bit encoder Output R-CT [5] 5.xxx 1 byte
6 Input 1 - Temperature
encoder
Output R-CT [9.1] DPT_Val-
ue_Temp
2 bytes
7 Input 1 - Brightness
encoder
Output R-CT [9.4] DPT_Value_Lux 2 bytes
8 Input 1 - Scene Output R-CT [18.1] DPT_Scene-
Control
1 byte
9 Input 1 - Block Input -WC- [1.3] DPT_Enable 1 bit
10 Input 2 - Extended Input /
Output
RWCT [1.8] DPT_UpDown 1 bit
11 Input 2 - Short Output R-CT [1.10] DPT_Start 1 bit
12 Input 2 - Switching Input /
Output
RWCT [1.1] DPT_Switch 1 bit
13 Input 2 - Relative dimming Input /
Output
RWCT [3.7] DPT_Con-
trol_Dimming
4 bit
14 Input 2 - 8-bit encoder Output R-CT [5] 5.xxx 1 byte
15 Input 2 - Temperature
encoder
Output R-CT [9.1] DPT_Val-
ue_Temp
2 bytes
16 Input 2 - Brightness
encoder
Output R-CT [9.4] DPT_Value_Lux 2 bytes
17 Input 2 - Scene Output R-CT [18.1] DPT_Scene-
Control
1 byte
18 Input 2 - Block Input -WC- [1.3] DPT_Enable 1 bit
19 Input 3 - Extended Input /
Output
RWCT [1.8] DPT_UpDown 1 bit
