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Section 3 Communications Commands
RFID System
User's Manual
Section 3
Commands
AUTO WRITE (AW)
This command writes data to the Data Carrier when the Data Carrier enters the communications area.
The Hand-held Reader Writer responds when communications between the Hand-held Reader Writer
and Data Carrier have ended.
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)
Write area start address Specifies the start address of the area in the Data Carrier to be written to 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 write bytes When multiple processing areas are used, specifies the number of bytes to be written to the Data
Carrier in 2-digit hexadecimal.
The maximum number of bytes that can be written at one time is 256 bytes.
•ASCII: 256 bytes (256 characters)
•Hexadecimal code: 256 bytes (512 characters)
Setting range: 01h to FFh
When multiple processing areas are used, set so that the total number of bytes to be written for all
areas is within 256 bytes,6 bytes, as follows:
Area (1) bytes +...+ Area (N) bytes
≤ 256 bytes
Write data Indicates the data to be written to the Data Carrier.
The characters in ASCII indicate the number of write bytes and the characters in hexadecimal code
indicate the number of write bytes × 2
Command
××
Command
code
AW
××
A/H 1
××
211 4
Write data
2
CR
Terminator
n
××
Data
setting
Processing
area
number
setting
Write area
start address
××
AW
××
A/H 2
××
Number of
write bytes
211 4 2
××
n
Write data
2
CRA/H
Data
setting
1
××
××××
Number of
write bytes
42
Write area
start address
××
n
Write data
Command
code
Data
setting
Processing
area
number
setting
Write area
start address
Terminator
Area (1) setting
Area (2) setting
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