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Communic
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Electromagnetic Inductive RFID System
User's Manual
SECTION 4
Commands
Communications Commands
This section describes the commands used for communicating with Tags.
Read (RD)
Reads data from the area specified by start address and number of bytes.
Example: Reading 8 Bytes of Data Starting from Address 0000h (Single Auto, Hexadecimal)
Send data:
RDSAH1000008
*
[CR]
Receive data: RD00001234567812345678
*
[CR]
Specify the total number of read bytes so that the sum of the read area start address and the number of bytes does not
exceed the Tag memory capacity (128 bytes).
Example: The number of bytes can be specified between 01h and 70h for a start address of 0010h.
Communications
designation
Specifies the method for communicating with a Tag.
Refer to
for details.
Data designation
Specifies the data format when sending the read data response.
“A”: ASCII
“H”: Hexadecimal
Antenna designation
Always “1”.
Read area start address
Specifies the start address in the Tag memory area for reading data in four hexadecimal digits.
Specification range: 0000h to 007Fh
No. of read bytes
Specifies the number of bytes of data to be read from the Tag in two hexadecimal digits.
The maximum number of characters that can be read at one time is 256.
Specification range: 01h to 80h
Read data
Data read from the Tag.
The number of characters is the number of read bytes in ASCII, and the
number of read bytes times 2 in hexadecimal.
2
2
2
2
1
1
4
㧖
CR
Command
code "RD"
Data
desig-
na-
tion
Antenna
designa-
tion
Read area start
address
No. of read
bytes
Communica-
tions desig-
nation
Command
2
2
1
1
2
㧖
CR
Command
code "RD"
Retry
flag
Status
flag
End code
"00"
Specified number of bytes
Read data
Response
Summary of Contents for V670-CF01
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