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Section 7 Message Details
RFID System
User's Manual
(Modbus TCP)
Section 7
Host Communications Specifications
 Query Format
 Response Format
Normal Response
Error Response
 Execution Example
Copying Four Words of Data Starting from Word Address 1234 Hex in the RF Tag to the RF Tag in the
Communications Field of the Reader/Writer at IP Address 192.168.1.201
TX: 00000000000FFF10A80000040812340004C0A801C9
RX: 000000000006FF10A8000004
Parameter Description
Register address The register address (A800 hex) that specifies the copying query.
Word count The number of words of data to read (0004 hex)
Byte count The number of bytes of data to read (08 hex)
Copy address Specify in 4-digit hexadecimal the start address for writing the copied data in the RF Tag.
Setting range: 0000 to 9FFF hex (Specify a word address.)
Copy word count Specify in 4-digit hexadecimal the number of words of data to copy.
Setting range: 0001 to 0066 hex (1 to 102)
IP address The IP address of the copy destination Reader/Writer in 32 bits
Example: C0A801C8 hex (192.168.1.200)
Parameter Description
Register address Contains the register address that was specified in the query.
Word count Contains the word count that was specified in the query.
Parameter Description
Exception code For details, refer to Exception Code Table in this section.
p.167
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8 Byte 9 Byte 10 Byte 11 Byte 12
Transaction identifier Protocol identifier Field length
Unit
identifier
Function code Register address Word count Byte count
X X 0000 hex 000F hex FF hex 10 hex A800 hex 0004 hex 08 hex
Byte 13 Byte 14 Byte 15 Byte 16 Byte 17 Byte 18 Byte 19 Byte 20
Copy address Copy word count IP address
2 bytes 2 bytes 4 byte (32 bits)
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8 Byte 9 Byte 10 Byte 11
Transaction
identifier
Protocol
identifier
Field length
Unit
identifier
Function code Register address Word count
X X 0000 hex 0006 hex FF hex 10 hex A800 hex 0004 hex
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
Transaction
identifier
Protocol identifier Field length
Unit
identifier
Function
code
Exception
code
X X 0000 hex 0003 hex FF hex 90 hex 1 byte
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