Communications Commands - Omron V600 Series User Manual

Section 5
Communications

Communications Commands

The commands used to perform communications with Data Carriers are described in this section.
READ (RD)
For READ the ID Controller reads data from Data Carrier memory. If there is no Data Carrier in the
communications area, an error response with an error code of 72 (Data Carrier missing) will be
returned.
■ 1:1 Communications
Command
Data
code speci-
Command code
fication
R D A/H
2 1
Data code specification
R/W Head No.
Read area start address
No. of read bytes
Response
End code
Command code
R D 0
2 2
End code
Read data
RFID System
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Operation Manual
R/W Head No.
No. of read
Read area start address
1/2 x x x x x
1 4
Specifies the type of code in which to send the read data in the response.
A: ASCII
H: Hexadecimal
Specifies the Read/Write Head with which to communicate.
1: Read/Write Head 1
2: Read/Write Head 2
Specifies the first address from which to read data from the Data Carrier as a four-digit hexadeci-
mal number.
Specifiable range: 0000H to FFFFH
Specifies the number of bytes of data to read from the Data Carrier as a two-digit hexadecimal
number. Up to 256 bytes can be read with one command.
Specifiable range: 00H to FFH (The maximum of 256 bytes will be read if 00H is specified.)
• ASCII specification: 256 bytes (256 characters)
• Hexadecimal code specification: 256 bytes (512 characters)
Read data Terminator
0 x x x x
n
Indicates the results of command execution. An end code of 00 is returned for a normal end.
Refer to End Codes for more information.
p.135
The data read from Data Carrier memory. The number of characters will be the same as the num-
ber of read bytes for ASCII data and twice the number of read bytes for hexadecimal data.
Terminator
bytes
x * CR
2 2
* CR
2