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OBID i-scan
2. Asynchronous Interface
2.1. Data Format and Protocol Frames
The Reader ID ISC.MR100-A can be configured by an asynchronous interface and data may be writ-
ten on Transponders or read from Transponders. The communication between Reader and connected
host (terminal, PC, etc.) is executed by means of fixed protocols. The used protocol is intended for
data bus use and is equipped with a bus address.
During data transfer via the asynchronous interface the Reader supplies the required data or a status
byte. The reply contain the transmitted control byte.
There is no reply from the Reader if there is a protocol frame failure.
Protocol frame:
Host → Reader
1
LENGTH = n
COM-ADR
Host ← Reader
1
LENGTH = n
COM-ADR
LENGTH n:
Number of protocol bytes 1- n (6 - 255) incl. length byte and checksum
COM-ADR:
0..254 address of device in bus mode
Note:
The Reader can be addressed via COM-Adr 255 at any time!
STATUS / PROTOCOL-DATA:
Includes the status message or protocol data from or to the Reader. The data will be send al-
ways as MSB first if the Reader is in the ISO15693Host Command Mode (see also:
Examples for Read
CRC16:
Cyclic redundancy check of the protocol bytes from 1 to n-2, as specified by CCITT-CRC16
Polynom
Start Value
Note:
This protocol frame is not valid for USB-Reader. For detail information please read the
description of the FEUSB.dll "H00501-xy-ID-B.pdf"
1
see ANNEX D: Index of Status Bytes
FEIG ELECTRONIC GmbH
System-Manual
2
3
CONTROL-
BYTE
2
3
CONTROL-
BYTE
Data.)
16
12
5
x
+ x
+ x
+ 1
0xFFFF
Page 15 of 118
4...n-2
n-1
PROTOCOL-
MSB-CRC16
DATA
4
(5...n-2)
(PROTOCOL-
1
STATUS
DATA)
ID ISC.MR/PR/PRH100/101-A
n
LSB CRC16
n-1
n
MSB-CRC16
LSB CRC16
ANNEX I:
H01000-5e-ID-B.doc
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