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Section 3 Communications Commands
RFID System
User's Manual
Section 3
Commands
Communications Commands
Details of communications commands used to communicate with the Data Carrier are provided here.
READ (RD)
This command reads data from the Data Carrier. If the Data Carrier is not in the communications area,
an error response (end code: 72 = Data Carrier non-existent) will be returned.
Processing area number: 1
Processing area number: 2
Data setting Sets the code format used to send responses for read data.
A: ASCII
H: Hexadecimal code
When multiple processing areas are used, ASCII and hexadecimal code can be specified at the
same time within a single command frame.
Processing area number
setting
Specifies the processing area number.
Setting range: 1 to 9, A (A = 10)
Read area start address Specifies the start address of the area to be read from the Data Carrier in 4-digit hexadecimal code.
Setting range: 0000h to 1FFFh
When multiple processing areas are used, specify the areas in order starting from the smallest
address. The same area cannot be specified twice.
Number of bytes to read Specifies the number of bytes to be read from the Data Carrier in 2-digit hexadecimal code. The
maximum number of bytes that can be read at one time is 256 bytes, as follows:
•ASCII: 256 bytes (256 characters)
•Hexadecimal code: 256 bytes (512 characters)
Setting range: 00h to FFh (00 = 256 bytes)
When multiple processing areas are used, set so that the total number of bytes from all areas to be
read is within 256 bytes, as follows:
Area (1) bytes +...+ Area (N) bytes
≤ 256 bytes
Command
××
Command
code
RD
××
A/H 1
××
Data
setting
Number of bytes
to read
211 4 2
2
CR
Terminator
Read area
start address
Proc-
essing
area
number
setting
××
Command
code
RD
××
A/H 2
××
Data
setting
Number of
bytes
to read
211 4 2
2
CR
Terminator
Read area
start address
Area
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