User Manual

CHAPTER 7: RFID COMMANDS
COBALT HF RFID CONTROLLERS OPERATOR’S MANUAL
P/N: 17-1320 REV 01 (03-06) PAGE 80 OF 116
This command instructs the RFID controller to locate a tag in RF range and retrieve its
unique tag identification number.
RFID tags are assigned a unique tag ID number during the manufacturing process. After
a tag ID number has been assigned to a tag, the value cannot be altered and is not
considered part of the available read/write memory space of the tag.
x ISO 14443 compliant tags receive a 4-byte tag ID number. By using just four
bytes, tag manufacturers can generate over 4.2 billion possible ISO 14443
compliant tag ID numbers.
x ISO 15693 compliant tags are given an 8-byte tag ID number. When using eight
bytes, manufacturers can generate over 280 trillion possible tag ID numbers.
C
OMMAND 07 (READ TAG ID) – ABX FAST C OMMAND S TRUCTURE
PARAMETER FIELD CONTENT
Header
0x02, 0x02
Command Size
0x0003
Command ID
0x07
Timeout Value
2-byte value, measured in 1 millisecond units.
(0x0001 – 0xFFFE).
Checksum
Optional
Terminator
0x03
COMMAND 07:
READ TAG ID