RFID Communications
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:
Field | Remarks |
Command | Command number in hex preceded by AAH |
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Family Code | Family Code, 00H = all tags |
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Reserved | 00H |
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Timeout | Timeout value given in 1 ms units (001EH - FFFEH) |
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Message Terminator | FFFFH |
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Example
This example locks the family code on all tags with the family code 02H. Two tags are found and locked.
Command from Host
MSB | LSB | Remarks |
AAH | 8CH | Perform Command 8CH |
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02H | 00H | Family ID/Reserved |
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07H | D0H | 2 second Timeout |
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FFH | FFH | Message Terminator |
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Response from Controller
MSB | LSB | Remarks |
AAH | 8CH | Command Echo |
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02H | 08H | Ntags/Status |
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FFH | FFH | Message Terminator |
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79 | LRP2000 Passive Reader/Writer |
