Omron V680-CA5D01-V2 User Manual page 181

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 data from a Tag. If there is no Tag in the communications area, the ID Con-
troller will return an error response with an error code of 72 (Tag missing error).
1:1 Protocol
Command
Data
desig-
Command
nation
code
A/H
R D
2 1
Data designation
Antenna designation
Read area start address
No. of bytes to read
Response
Command
End code
code
R D 0
2
End code
Read data
RFID System
178
User's Manual
Antenna
designation
Read area
No. of bytes
start address
to read
× ×
× ×
× ×
1/2
1 4 2
Specifies the code format when sending the read data response.
"A": ASCII
"H": Hexadecimal
Specifies the Antenna with which to communicate.
"1": Antenna 1
"2": Antenna 2
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
Specifies the number of bytes of data to read from the Tag in 2-digit hexadecimal.
Up to 256 bytes can be read with one command.
Setting range: 00
• ASCII: 256 bytes (256 characters)
• Hexadecimal: 256 bytes (512 characters)
Read data
Terminator
... × ×
× × *
0
2 n
Indicates the execution result for the command.
"00" indicates a normal end.
Refer to List of End Codes for information on other end codes.
p. 235
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.
Terminator
* CR
2
to FFFF
H H
to FF Specify 00H for 256 bytes.)
H (
CR
2