Universally unique identifier (uuid) – Rockwell Automation 56RF RFID System User Manual User Manual
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Rockwell Automation Publication 56RF-UM001A-EN-P - October 2011
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RFID Components
Chapter 2
Tag Memory Structure
Universally Unique Identifier (UUID)
Each tag has a different 64-bit hexadecimal UUID that is programmed during
the production process according to ISO/IEC 15693-3 and cannot be changed
afterwards.
The numbering of the 64 bits is done according to ISO/IEC 15693-3 starting
with the least significant bit (LSB) 1 and ending with the most significant bit
(MSB) 64. This is in contrast to the general used bit numbering within a byte
(starting with LSB 0).
Byte 5 (bit 41…48) is the tag type. Byte 6 (bit 49…56) is the manufacturer code,
which coincides with the number of bytes/block.
The table below shows the RFID tags offered by Rockwell Automation and their
structure.
Table 5 - Tag Structure
Byte
7
6
5
4
3
2
1
0
Name
UID 7
UID 6
UID 5
UID 4
UID 3
UID 2
UID 1
UID 0
Bit
64…57
56…49
48…41
40…1
Value
SLI
E0
04
01
Unique Serial Number
SLI-S
E0
04
02
Unique Serial Number
SLI-L
E0
04
03
Unique Serial Number
FRAM
E0
08
01
Unique Serial Number