RFID Communications
79 LRP2000 Passive Reader/Writer
6.4.18 ABxS Command 8CH: Lock Family Code All
DESCRIPTION
Command 8CH 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
returns 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:
Example
This example locks the family code on all tags with the family code 02H. Two tags are found and locked.
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
Command from Host Response from Controller
MSB LSB Remarks MSB LSB Remarks
AAH 8CH Perform Command 8CH AAH 8CH Command Echo
02H 00H Family ID/Reserved 02H 08H Ntags/Status
07H D0H 2 second Timeout FFH FFH Message Terminator
FFH FFH Message Terminator