86
Section 5 Communications Commands
RFID System
Operation Manual
Section 5
Communications
EXPANSION READ (XR)
For EXPANSION READ, the ID Controller reads up to 2 KB of Data Carrier memory data by dividing
the data into frames. 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.
The host device cannot send commands to the ID Controller until all response frames have been
returned. (Excluding the AA command and XZ command.)
■ 1:1 Communications
Less Than 251 Characters in Read Data
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 four-digit hexadecimal
number. Up to 2048 bytes can be read with one command.
Specifiable range: 0001H to 0800H
• ASCII specification: 2048 bytes (2048 characters)
• Hexadecimal code specification: 2048 bytes (4096 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 number of
read bytes for ASCII data and twice the number of read bytes for hexadecimal data.
xx
Command code
xR
xx
A/H 1/2
xx
211 4
4
No. of read bytes
2
*CR
Terminator
xx
Data code
specifica-
tion
Read area start address
R/W Head No.
x
Command code
xR
x
00
xx
22 n
2
*CR
Terminator
Read dataEnd code
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