Zebra Technologies radio frequency identification (rfid) ユーザーズマニュアル

Transponder Characteristics
EPC Class 1, Generation 2 (Gen 2)

58978L-008 Rev. A

RFID Programming Guide

11/14/2008

EPC Gen 2 tags offer advantages over other tag types. The tag identification (TID) memory in 
a Gen 2 tag includes the chip manufacturer and model number information, which can be used 
to identify which optional features are present on the tag. These optional features include those 
for data content and security.

 for the UHF printers and 

firmware versions that can use Gen 2 tags. 

Gen 2 tags typically have a 96-bit EPC identifier, which is different from the 64-bit identifiers 
common in early EPC tags. Gen 2 tags also support much larger data structures. The size of 
user memory available (if any) varies by the model and manufacturer of the tag.

Tag Passwords  You can set optional 32-bit passwords that allow you to access tag data, to 
lock tag data, or to permanently disable (kill) a tag. Use the ZPL command 

set the passwords (if desired) and 

 to read the passwords.

Data Locking Options  User-allocated memory can be safeguarded with flexible locking 
options using 

. For example, you can lock a tag’s blank memory to prevent it 

from being encoded accidentally and later unlock it for writing. A permanent locking feature 
prevents rewriting of tag data.

 shows how information is stored on a Gen 2 tag. 

3

User

…

2

TID

…

TID (15:0)

TID (31:16)

1

EPC

EPC  (15:0)

…

EPC (N:N-15)

PC (15:0)

CRC-16 (15:0)