Identification
Manual
ID ISC.MR102
FEIG ELECTRONIC GmbH
Page 18 of 153
H01113-4e-ID-B.docx
3.2. Serial Data Format and Protocol Frames
The Reader ID ISC.MR102 can be configured by different interfaces and data may be written 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 contains the transmitted control byte.
There is no reply from the Reader if there is a protocol frame failure.
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
STX:
If the responded protocol of the Reader starts with the STX sign (0x02) the proto-
col frame is Advanced Protocol-Length. Then the protocol length is defined by the
2 Byte Parameter ALENGTH.
ALENGTH (n = 8...65535):
Number of protocol bytes including STX, ALENGTH and CRC16
LENGTH (n = 6...255): Standard Protocol-Length (up to 255 Byte)
Number of protocol bytes including LENGTH and CRC16.
