User's Manual

UHF RFID Reader UR - SERIES User Manual v1.14
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Response frame:
Len
Adr
reCmd
Status
Data[]
CRC-16
Ant
Num
EPC ID
0xXX
0xXX
0x1a
0xXX
0xXX
0xXX
EPC-1
LSB
MSB
Parameters definition
Status: the status of response, detail description is shown in the following table
Status
Description
0x01
Operation completed, reader will report all inquired tags information to
host
0x02
Inventory timeout, operation is aborted. reader will report all the already
inquired tags to host
0x03
Reader is not able to response all the data in a single frame, further data
will be transmitted in the following frames.
0xF8
Antenna error detected, the current antenna might be disconnected.
Ant: indicates which antenna had inquired a tag. For example, 0x04 is 0000 0100 in binary, this
indicates Antenna 3 had inquired this specific tag. For 0x08, it is 0000 1000 in binary, then it
indicates Antenna 4 had inquired tag information.
Num：the amount of tag EPC included in this response.
EPC ID: inquired EPC/TID data. For instance, EPC-1 is the EPC/TID length + EPC number/TID
data + RSSI value of the first tag etc. The RSSI and EPC length values are one byte parameters. The
unit of EPC C1 G2 data is word. During communication, the most-significant word and the
most-significant byte in a word will be transmitted first.
8.2.23 QT inventory
This command is used to inquiry the private EPC number of a Monza4QT tag with public mirroring.
The command seeks RFID tags with corresponding protocol. In order to process further operation
on a new tag with unknown EPC, user should firstly obtain tag EPC number by using inventory
command.
According to different circumstances, user can modify the setting of maximum operation time
(inventory time). Reader will return an inventory result within the predefined inventory time. If the
reader fails to complete inventory processes for all the tags in the effective field within the
predefined inventory time, reader will not perform further inventory after inventory time is exceed.
Reader will report all the already inquired tags, as well as the current (uncompleted) inventory
status to host. Reader will then wait for the next command from host.
Default inventory time is 1s, it can be modified by using reader customised command "modify
reader inventory time" (refer to chapter 8.4.4). The valid range of inventory time is from 3*100ms
to 255*100ms (the actual responding time may slightly larger than the setting value and this