63
RFID System
User's Manual
Section 3
V680 Commands
Section 3
Commands
Command and Response Formats
The formats of commands sent from the host device to the Hand-held Reader/Writer and responses
returned from the Hand-held Reader/Writer to the host device are described below.
The command and response both consist of a single frame. Each frame (including the terminator)
consists of up to 2,114 characters. (When specifying hexadecimal for using the WRITE command, the
maximum is 4,218 characters.)
Command Frame
Response Frame
Note:
Other than the above items, the same data as the command frame is returned in the response.
Name
Description
Command code
Contains the two-character code (see page 88) that indicates command.
Communications specification
Contains the two-character code that indicates the method used to communicate with the RF Tag (see page
59.)
Data
Contains the parameters or write data used to execute the command.
• Data settings, processing specifications
• Start address
• Write data, number of bytes to be written
• Number of read bytes
• Number of check block bytes, decrement count
• Specified data
• Message data
• Parameter data
• Baud rate, data length, parity, and stop bit specifications
• Auto command OFF specification
• Settings for the TR command, settings for the FN command, and system setting data
Terminator
Indicates end of command/response.
Name
Description
End code
Indicates the execution result for the command.
For information on end codes, refer to
Fixed value
Always 1.
Resend flag
Always 0.
Data
The data for the response.
• Read data
• UID
• Processing terminate timing
• Parameter data
• Message data
• Model information
×
×
×
2
2
C R
×
…
×
n
×
Communications
specification
×
×
2
1 frame (maximum frame length: 2,114 characters)
Command
code
Data
Terminator
×
×
×
2
2
C R
×
…
×
n
×
×
×
2
1
0
1
1
Command
code
Data
Terminator
End code
Fixed
value
Resend
flag
