User Guide

Table Of Contents
Gen2 Tag Commands
122
specified, it will attempt to kill the first tag it finds. If no tag is in the field, the kill password
is zero, or the Select criteria cannot be satified a fault code is returned.
In addition to the Tag Singulation Fields the Kill command takes the tag’s Kill Password
and an extra 1 byte field for future use (RFU).
The following example shows an attempt to kill a tag whose EPC
ID=0x112233445566778899AA and whose Kill password=0x11112222:
Note
If the tag’s kill password is set to 0, the protocol does not allow the tag to be
killed. A non-zero kill password must be set (using the
Write Tag Data
command) before the kill command succeeds. The RFU field should be set
to 0.
Read Tag Data (28h)
The Read Tag Data command reads the specified memory bank at data address location
within that memory bank of a tag. The tag which will be read can be specified using the
Tag Singulation Fields or, if Option=0x00 of the Tag Singulation Fields is specified, it will
attempt to read from the first tag it finds. If no tag is in the field, the memory location
doesn’t exist or is read locked, or the Select criteria cannot be satified a fault code is
returned.
In addition to the Tag Singulation Fields the Read Tag Data command takes several fields
which specify the data which will be read from the tag. These fields are:
FF 13 26 03 E8 01 11 11 22 22 00 50
11 22 33 44 55 66 77
88 99 AA
DD DB
SOH Length OpCode Timeout (ms) Option Kill Password RFU Select
Data
Length
Select EPC ID CRC