User's Manual

UHF RFID Reader UR - SERIES User Manual v1.14
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WEPC: the EPC number to be written to tag. The amount of words in WEPC must be identical to
the value of ENum. The minimum and maximum length of WEPC is 1 and 31. Reader will return a
parameter error status in the response frame if data with inappropriate length is delivered in this
field.
Response frame:
Len
Adr
reCmd
Status
Data[]
CRC-16
0x05
0xXX
0x04
0x00
——
LSB
MSB
8.2.5 Kill tag
The function of this command is to kill tags. After the kill operation, the tags will no longer process
any command from reader.
Command frame:
Len
Adr
Cmd
Data[]
CRC-16
0xXX
0xXX
0x05
——
LSB
MSB
Parameters of Data[]:
Data[]
ENum
EPC
Killpwd
MaskMem
MaskAdr
MaskLen
MaskData
0xXX
variable
4 bytes
0xXX
2 bytes
0xXX
variable
Parameters definition
ENum:
0x00 ~ 0x0f – ENum represents the length of EPC number. The unit of ENum is word, and the
length of EPC should be less than 15 words. In this situation, parameters MaskMen,
MaskAdr, MaskLen, MaskData should all be left empty.
0xff – MaskMem, MaskAdr, MaskLen, MaskData should be provided instead of EPC parameters.
Reader will return a parameter error status in the response frame if other value is delivered in
this field.
EPC: EPC number of the target tag. Length of the EPC depends on the provided EPC number. The
unit of EPC number is word. During communication, the most-significant word and the
most-significant byte in a word will be transmitted first. It is essential to provide FULL EPC in this
command.
Killpwd: 4 bytes, it is the 4 bytes kill password of a tag. From left to right, the first two bytes are
the high bytes of kill password, and the last two bytes are the low bytes. The most-significant bit of
a tag 32-bit kill password is the most-significant bit in the 1st byte of Killpwd (from left to right).
Likewise, the least-significant bit of a tag 32-bit kill password is the least-significant bit in the 4th
(last) byte of Killpwd. In order to kill a tag, the kill password of this tag must be non-zero. It is not
possible to kill a tag with zero kill password, hence reader will return a parameter error status in the