User Manual Part 2

RFID Interface
126
LRP820S-Series Long-Range Passive Reader/Writers
Example
Reads 4 Bytes of data from tags with Family ID AAH, starting at
address 0001H. A timeout of 2 seconds (07D0H = 2000 x 1 msec
increments) is set for the completion of the Block Read All. The Family
Code is set to zero so all tags will be read.
Command from host Response from controller
Field Content ield Content
Header 0202H Header 0202H
Command Size 0009H Response Size 0003H
Command Code 85H Command
Echo/Tag 1
85H
Family Code 00H Data from
address 0001H
05H
Reserved 00H Data from
address 0002H
AAH
Start address 0001H Checksum C8H
Length of read 0002H Te r m ina to r 03H
Timeout, 2
seconds
07D0H Header 0202H
Checksum EBH Response Size 0003H
Terminator 03H Command
Echo/Tag 2
85H
Data from
address 0001H
05H
Data from
address 0002H
AAH
Checksum C8H
Termi na to r 03H
Header 0202H
Response Size 0003H
Command
Status
FFH
Number of tags 02H
Status Byte 08H
Checksum F3H
Termi na to r 03H