OBID
i-scan
®
UHF
Manual
ID ISC.LRU3000/3500
FEIG ELECTRONIC GmbH
Page 19 of 193
H90202-7e-ID-B.docx
Protocol frame: Standard Protocol-Length (up to 255 Byte)
Host
→
Reader
1
2
3
4...n-2
n-1
n
LENGTH =
n
COM-ADR
CONTROL-
BYTE
(DATA)
LSB
CRC16
MSB
CRC16
Host
←
Reader
1
2
3
4
(5...n-2)
n-1
n
LENGTH
(n)
COM-ADR
CONTROL-
BYTE
STATUS
(DATA)
LSB
CRC16
MSB
CRC16
Protocol frame: Advanced Protocol-Length
Reader
←
Host
1
2
3
4
5
(6...n-2)
STX
(0x02)
MSB
ALENGTH
LSB
ALENGTH
COM-ADR
CONTROL-
BYTE
(DATA)
n-1
n
LSB
CRC16
MSB
CRC16
Host
←
Reader
1
2
3
4
5
6
(7...n-2)
STX
(0x02)
MSB
ALENGTH
LSB
ALENGTH
COM-ADR
CONTROL-
BYTE
STATUS
(DATA)
n-1
n
LSB
CRC16
MSB
CRC16
The Reader supports both Protocol frames, standard and advanced protocol frame. The Host ap-
plication can choose which protocol frame is used. The Reader will always response with ad-
vanced protocol frame.
1
see ANNEX C: Index of Status Bytes
2
