User's Manual

Hi-G-Tek Ltd. Microelectronics & Asset Tracking Technology
121
6
RS 485/232 Communication Protocol
Response & Acknowledge strings:
6.4.2. Reader to LSC Message
This is the marker for the beginning of the messages.
STX=02 hex.
String length, the string contains the R#, MSGT, MC,
R_status, the DATA field and the CRC.
This is the address of the READER for the current
session.
This is the message type response for the current
session. The MSGT corresponds to a specific
command (see paragraph 6.4.2.1)
This is the message code (see paragraph 5.2)
This is the status field of the reader. The field contains
bytes A&B (see paragraph 6.4.2.2)
The data field contains the relevant response data.
This is the cyclic redundancy check for fields #B,
MSGT, R_status and DATA.
This is the marker for the end of the messages.
ETX=03 hex.
STX
#B
R#
MSGT
MC
R_status
DATA
CRC
ETX