Siemens KNX EIB TP-UART 2-IC Manual page 31

KNX EIB TP-UART 2-IC
Control Field
8 3 - 2
Layer-2 Services
2 # 2 2 2
L_DATA.req
2 2 #
L_EXT_DATA.req
2 2 2 2 L_POLLDATA.req
Immediate Acknowledge Services
2 2 2 2 Acknowledge frame
2 2 2 2 2 2 NotAcknowledge frame
2 2 2 2 2 2 Busy frame
TP-UART-Control-Services
2 2 2 2 2 2
Reset-Indication
< < < < < < < < ProductID.response
< < < < <
State.response/indication
< 2 2 2 2
L_DATA.confirm
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 Hexadecimal
FFR1 cc00
FF11 0000 30/B0
FF01 0000 10/90
FF11 1000 38/B8
FF01 1000 18/98
FF11 0100 34/B4
FF01 0100 14/94
FF11 1100 3C/BC
FF01 1100 1C/9C
1111 0000 F0
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.
Siemens AG
Infrastructure and Cities Sector,
Building Technologies
Control Products and Systems
P. O. Box 10 09 53,
D-93009 Regensburg
data link frame type
L_DATA request
Hex
L_DATA request
Hex
L_DATA request
Hex
L_DATA request
Hex
L_DATA request
Hex
L_DATA request
Hex
L_DATA request
Hex
L_DATA request
Hex
L_POLLDATA request
Hex
Subject to change without further notice.
repeat flag = 0: repeated L_DATA
frame
repeat flag = 1: not repeated
2
2 2
2
2
x = 1 Positive Confirm
x = 0 Negative Confirm
class
system
system
urgent
urgent
normal
normal
low
low
system
pages 42
© Siemens AG 2012
GAMMA instabus
Release: February 2012
system priority
urgent priority
normal priority
low priority
repeat flag
(0 = repeated)
not repeated
repeated
not repeated
repeated
not repeated
repeated
not repeated
repeated
Technical Manual
page 31