136
SECTION 5
V680 Commands
RFID System
User’s Manual
SECTION 5
Communications
READ TAG MEMORY ERROR CORRECTION (QR)
Reads Tag data from the area written by the WRITE TAG MEMORY ERROR CORRECTION (QW)
command, and performs 1-bit error correction. Be sure to read the same area that was written by the
QW command.
1:1 Protocol
Communications Designation Other Than PA or PI
Note: When using the multi-access trigger communications designation (MT), the ID controller returns
an end code of 03 after communicating with all Tags.
Communications Designation of PA or PI
Communications
designation
Specifies the method of communications with the Tag.
Refer to Communications Designation Function for details on the communications designation.
p. 103
Data designation Specifies the code format when sending the read data response.
“A”: ASCII
“H”: Hexadecimal
Antenna designation Specifies the Antenna with which to communicate.
“1”: Antenna 1
“2”: Antenna 2
UID A unique identifier used to identify Tags.
Added only for the selective communications designation (SL).
Read area start address Specifies the start address of the area in the Tag from which data is to be read from in 4-digit
hexadecimal.
Setting range: 0000
H to FFFAH
No. of bytes to read Specifies the number of bytes to read from the Tag in 4-digit hexadecimal.
Up to 510 bytes can be read with one command.
Setting range: 0001
H to 01FEH
• ASCII: 510 bytes (510 characters)
• Hexadecimal: 510 bytes (1,020 characters)
Antenna designation Specifies the Antenna with which to communicate.
“1”: Antenna 1
“2”: Antenna 2
Note: If a host communications error (other than error code 15) is generated, a “0” will be added.
UID Added when the ADD UID (US) command is set to add a UID, or when a multi-access communi-
cations designation (MT/MR) is specified.
Read data The data read from the Tag.
The number of characters will be the same as the specified number of bytes to read for ASCII
data and twice that number for hexadecimal data.
××
QR
××
A/H 1/2
××
211 4
2
* CR
Terminator
××
4
××
2
...
×
××
0 or 16
UID
×
Command
code
Antenna
designation
Communi-
cations
designation
Read area start
address
Data
desig-
nation
No. of bytes to read
Command
Response
QR
...
×
00
××
22 n
2
* CR
End code
×
0×
11
...
×
××
0 or 16
UID
×
Command
code
Terminator
Antenna
desig-
nation
Resend flag
Read data
QR
01
22
2
* CR
0×
11
××
UID
××
0 or 16
...
End code
Command
code
Terminator
Antenna
desig-
nation
Resend flag
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