User Manual Part 2

RFID Interface
80
LRP820S-Series Long-Range Passive Reader/Writers
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ABxS Command 8CH: Lock Family Code All
DESCRIPTION
This command locks the family codes of tags in the field. Once locked,
the Family Codes cannot be changed or unlocked.
DISCUSSION
The command must pass a family code to select the tags whose
family code will be locked. The controller will return a response when
the timeout period expires. The parameter of the response in the
number of tags written.
The command is formatted as shown below.
Field Remarks
Command Command number in hex preceded
by AAH
Family Code Family Code, 00H = all tags
Reserved 00H
Timeout Timeout value given in 1 ms units
(001EH - FFFEH)
Message Terminator FFFFH
Example
This example will lock the Family Code on all tags with the Family
Code of 02H. Two tags are found and locked.
Command from host Response from controller
MSB LSB Remarks MSB LSB Remarks
AAH 8CH Perform
Command 8CH
AAH 8BH Command
Echo
02H 00H Family ID/
Reserved
02H 00H Ntags/Status
07H D0H 2 second Timeout FFH FFH Message
Terminator