User Manual Part 2

RFID Interface
86
LRP820S-Series Long-Range Passive Reader/Writers
A response to a successful command will follow this form.
Field Remarks
Command Echo Command number in hex
preceded by AAH
Number of Tags filled 0 = tag not found, 1 = tag filled
Command Status One byte Error status
Message Terminator FFFFH
Example
Writes 'A' (41H) to a single tag, starting at tag address 0005H for the
following next consecutive 40 bytes. The Family Code is set to 00H. A
timeout of 2 seconds (07D0H = 2000 x 1 msec increments) is set for
the completion of the command.
Fill Length The number of tag addresses to be
filled
Timeout Timeout value given in 1 ms units
(001EH - FFFEH)
Tag Serial Number The 8-byte serial number
Data Value Byte The byte used to fill
Message Terminator FFFFH
Command from host Response from controller
MSB LSB Remarks MSB LSB Remarks
AAH 94H Perform
Command 94
AAH 94H Command
Echo
00H 00H Family ID/
Reserved
01H 00H Ntag/Status
00H 05H Start Address FFH FFH Message
Terminator
00H 28H Fill Length
07H D0H Timeout
00H 01H SN byte 0
00H ACH SN byte 1
00H 42H SN byte 2
Field Remarks