138
SECTION 5
V680 Commands
RFID System
User’s Manual
SECTION 5
Communications
WRITE TAG MEMORY ERROR CORRECTION (QW)
Writes data to a Tag. A tag memory check and 5-byte error correct code are written consecutively after
the written data. Do not change this code, as it is required by the READ TAG MEMORY ERROR COR-
RECTION (QR) 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 FFFAH
• ASCII: 510 bytes (510 characters)
• Hexadecimal: 510 bytes (1020 characters)
UID A unique identifier used to identify Tags.
In the case of multi-access communications designations (MT/MR), the UID of the Tag that is
being written to is added to the data.
××
QW
××
A/H 1/2
××
Write data
211 4
2
* CR
Terminator
Write area start address
××
n
××
2
...
××
UID
××
0 or 16
...
Command
code
Communi-
cations
designation
Data
desig-
nation
Antenna
designation
Command
Response
QW
00
22
2
* CR
0
×
11
××
UID
××
0 or 16
...
Terminator
End code
Command
code
Antenna
desig-
nation
Resend flag
QW
01
22
2
* CR
0
×
11
××
UID
××
0 or 16
...
End code
Command
code
Antenna
desig-
nation
Resend flag
Terminator
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