95
RFID System
Operation Manual
Section 5 Communications Commands
Section 5
Communications
AUTO READ (AR)
For AUTO READ, the ID Controller waits for a Data Carrier to approach and then reads data from Data
Carrier memory. The ID Controller will return a response to the host device when communications with
the Data Carrier have been completed.
■ 1:1 Communications
Data code specification Specifies the type of code in which to send the read data in the response.
A: ASCII
H: Hexadecimal
R/W Head No. Specifies the Read/Write Head with which to communicate.
1: Read/Write Head 1
2: Read/Write Head 2
Read area start address 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
No. of read bytes 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)
End code 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
Read data 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.
xx
AR
xx
A/H 1/2
xx
211 4 2
2
*CR
Terminator
No. of read
bytes
Command code
Read area start address
Data code
specifica-
tion
R/W Head No.
x
Command code
AR
x
00
xx
22 n
2
*CR
Terminator
Read dataEnd code
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