User's Manual
18 Rockwell Automation Publication 56RF-UM001D-EN-P - November 2021
Chapter 2 RFID Components
Data Storage Format Identifier (DSFID)
The DSFID indicates how data is structured in the tag memory. The respective
commands can program and lock it. It is coded on 1 byte. It allows for instant
knowledge on the logical organization of the data.
Electronic Article Surveillance (EAS)
EAS is a technology that is typically used to help prevent shoplifting in retail
establishments. An EAS detection system detects active tags and sets off an
alarm.
EAS status is 1-bit data (LSB side), which is stored in the system area of a tag.
The initial value is 1. EAS bit 1 means goods-monitoring status, and EAS bit 0
means that goods-monitoring status is cleared.
Smart Label Integrated Circuit (SLI)
SLI tags use an EEPROM (electrically erasable programmable read-only
memory) to store data. The 1024-bit EEPROM memory is divided into
32blocks. Each block consists of 4 bytes (1block= 32 bits). Bit 0 in each byte
represents the least significant bit (LSB) and bit 7 the most significant bit
(MSB), respectively.
SLI Tags
SLI
EAS Function
The LSB of Byte 1 in Block -2 holds the EAS bit (Electronic Article Surveillance
mode active – the label responds to an EAS command)
EAS
Table 7 - SLI Tags
Block Byte 0 Byte 1 Byte 2 Byte 3 Description
-4 UID0 UID1 UID2 UID3 Unique identifier (lower bytes)
-3 UID4 UID5 UID6 UID7 Unique identifier (higher bytes)
-2 Internally used EAS AFI DSFID EAS, AFI, DSFID
-1 00 00 00 00 Write access conditions
0
User Data
1
2
:
:
:
22
23
27
Table 8 - EAS
Block -2, Byte 1
MSB LSB
XXXXXXXe