RFID Communications

6.4.17 ABxS Command 8BH: Write Family Code All

DESCRIPTION

Command 8BH can be used to write the family code of all tags in the field. It can also be used to selectively rewrite the family codes of tags with family codes already set to a particular value.

The command is formatted as shown below.

Field

Remarks

Command

Command number in hex preceded by AAH

 

 

Current Family Code

Current Tag Family Code

 

 

Reserved

00H

 

 

Timeout

Timeout value given in 1 ms units (001EH - FFFEH)

 

 

New Family Code

The value that will be written to the Family Codes of all the addressed tags

 

 

Message Terminator

FFFFH

 

 

Example

This example changes the family code depending on the current value of the family code. Two tags are found with family code 02H and are changed to 03H.

Command from Host

MSB

LSB

Remarks

AAH

8BH

Perform Command 8BH

 

 

 

02H

00H

Family ID/Reserved

 

 

 

07H

D0H

2-second Timeout

 

 

 

00H

03H

New Family Code

 

 

 

FFH

FFH

Message Terminator

 

 

 

Response from Controller

MSB

LSB

Remarks

AAH

8BH

Command Echo

 

 

 

02H

08H

Ntags/Status

 

 

 

FFH

FFH

Message Terminator

 

 

 

LRP2000 Passive Reader/Writer

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Escort LRP2000 manual ABxS Command 8BH Write Family Code All, AAH 8BH