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SECTION 5
V680 Commands
RFID System
User’s Manual
SECTION 5
Communications
Commands for Tag Communications
This section describes the commands that are used to communicate with Tags.
READ (RD)
The READ command reads up to 2 KB of data from a Tag.
1:1 Protocol
Communications Designation Other Than PA or PI
Communications Designation of PA or PI
Communications designa-
tion
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 FFFFH
No. of bytes to read Specifies the number of bytes to read from the Tag in 4-digit hexadecimal.
Up to 2 KB can be read with one command.
Setting range: 0001
H to 0800H
• 1000 Byte Tags (V680-D1KP@@)
ASCII: 1000 bytes (1000 characters)
Hexadecimal: 1000 bytes (2000 characters)
• 8-/32-KB Tags (V680-D8KF68/-D32KF68)
ASCII: 2048 bytes (2048 characters)
Hexadecimal: 2048 bytes (4096 characters)
• 2000 Byte Tags (V680-D2KF@@)
ASCII: 2000 bytes (2000 characters)
Hexadecimal: 2000 bytes (4000 characters)
UID A unique identifier used to identify Tags.
Added in the following cases:
• Added when the ADD UID (US) command is set to add a UID.
• Added for multi-access communications designations (MT/MR).
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.
××
RD
××
A/H 1/2
××
211 4
2
* CR
××
4
××
2
×
...
×
××
0 or 16
UID
Command
code
Data
desig-
nation
Antenna designation
No. of bytes to read
Terminator
Read area start address
Communi-
cations
designation
Command
Response
RD
...
×
00
××
22 n
2
* CR
×
0×
11
...
×
××
0 or 16
UID
×
Command
code
Terminator
Read data
End code
Antenna
desig-
nation
Resend flag
RD
01
22
2
*
CR
End code
0
×
11
Command
code Terminator
Resend
flag
Antenna
designa-
tion
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