OBID
i-scan
®
Manual
ID ISC.PRHD102
FEIG ELECTRONIC GmbH
Page 16 of 125
H71101-2e-ID-B.doc
3. Asynchronous Interface
3.1. Data Format and Protocol Frames
The Reader ID ISC.PRHD102 can be configured by an asynchronous interface 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 contain 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
MSB
CRC16
LSB
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
MSB
CRC16
LSB
CRC16
The Reader supports the advanced protocol frame.
STX:
If the responded protocol of the Reader starts with the STX sign (0x02) the proto-
col can includes more than 255 Byte. 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
COM-ADR:
0..254 address of device in bus mode
Note:
The Reader can be addressed via COM-ADR 255 at any time!
Summary of Contents for OBID i-scan ID ISC PRHD102
Page 77: ...OBID i scan Manual ID ISC PRHD102 FEIG ELECTRONIC GmbH Page 77 of 125 H71101 2e ID B doc...
Page 78: ...OBID i scan Manual ID ISC PRHD102 FEIG ELECTRONIC GmbH Page 78 of 125 H71101 2e ID B doc...
Page 79: ...OBID i scan Manual ID ISC PRHD102 FEIG ELECTRONIC GmbH Page 79 of 125 H71101 2e ID B doc...
Page 80: ...OBID i scan Manual ID ISC PRHD102 FEIG ELECTRONIC GmbH Page 80 of 125 H71101 2e ID B doc...
