Siemens KNX EIB TP-UART 2-IC - Page 31

GAMMA instabus
Release: February 2012
KNX EIB TP-UART 2-IC
Siemens AG pages 42 Technical Manual
Infrastructure and Cities Sector,
Building Technologies
Control Products and Systems © Siemens AG 2012 page 31
P. O. Box 10 09 53, Subject to change without further notice.
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Control Field
7 6 5 4 3 2 1 0
Layer-2 Services
repeat flag
class class
1 0 r 1 c1 c0 0 0
L_DATA.req
c1 c0
0 0 r 1
c1
c0 0 0
L_EXT_DATA.req
0 0
system priority
1 1 1 1 0 0 0 0
L_POLLDATA.req
1 0
urgent priority
Immediate Acknowledge Services
0 1
normal priority
1 1 0 0 1 1 0 0
Acknowledge frame
1 1
low priority
0 0 0 0 1 1 0 0
NotAcknowledge frame
1 1 0 0 0 0 0 0
Busy frame
TP-UART-Control-Services
0 0 0 0 0 0 1 1
Reset-Indication
x x x x x x x x
ProductID.response
x x x x x 1 1 1
State.response/indication
x 0 0 0 1 0 1 1
L_DATA.confirm
x = 1 Positive Confirm
x = 0 Negative Confirm
repeat flag = 0: repeated L_DATA
frame
repeat flag = 1: not repeated
Fig. 25: Control Field
3.2.3.1.10 Layer-2 Services
The Layer-2 Services includes all standard EIB-Linklayer Services. The Controlfields are followed by
the data of the EIB-Frame. All bytes received on the EIB are immediately sent to the host. The host
either has to detect an end of packet timeout by supervising the EOP gap of 2 - 2,5 ms or check the
end of frame by calculating the CCITT CRC (must be enabled by the U_ActivateCRC service).
control field
FFR1 cc00
Hexadecimal data link frame type class repeat flag
(0 = repeated)
FF11 0000 30/B0
Hex
L_DATA request system not repeated
FF01 0000 10/90
Hex
L_DATA request system repeated
FF11 1000 38/B8
Hex
L_DATA request urgent not repeated
FF01 1000 18/98
Hex
L_DATA request urgent repeated
FF11 0100 34/B4
Hex
L_DATA request normal not repeated
FF01 0100 14/94
Hex
L_DATA request normal repeated
FF11 1100 3C/BC
Hex
L_DATA request low not repeated
FF01 1100 1C/9C
Hex
L_DATA request low repeated
1111 0000 F0
Hex
L_POLLDATA request system
Fig. 26: Controlfield for Layer 2 Services
The Frameformat 01 is not supported.
For a complete description of the Linklayer service see the KNX Standard.