Omron V780 Series User Manual page 176

7 Modbus/TCP Communications
ID WRITE
 Function
This command writes the ID (i.e., the UII (EPC code)) to the RF Tag in the communications range.
 Command Format
Byte-0 Byte-1
Transaction identi-
fier
X X
Byte-12 Byte-13
Byte UII (EPC) length
count
1 byte 2 bytes
Parameter
Field length
Register address
Word count
Byte count
UII (EPC) length
UII (EPC code)
 Response Formats
• Normal Response
Byte-0 Byte-1
Transaction identi-
fier
X X
Parameter
Register address
Word count
Note If the reception level is required, use GET RF TAG ADDITIONAL INFORMATION on page 7-131.
• Error Response
Byte-0 Byte-1
Transaction identi-
fier
X X
Parameter
Exception code
7 - 24
Byte-2 Byte-3 Byte-4 Byte-5
Protocol identifier Field length
0000 hex 2 bytes
Byte-14 Byte-15 ...
UII (EPC code)
0 to 62 bytes
Setting range: 0015 to 0047 hex
The register address (4000 hex) that specifies reading or writing the ID
Setting range: 0001 to 0020 hex
Setting range: 02 to 40 hex
Gives the word size of the UII (EPC code) in 4-digit hexadecimal.
0000 to 001F hex (0 to 32)
Gives the Tag-specific information according to Gen2 standards.
Byte-2 Byte-3 Byte-4 Byte-5
Protocol identifier Field length
0000 hex 0006 hex
The register address from the command is set.
The word count from the command is set.
Byte-2 Byte-3 Byte-4 Byte-5
Protocol identifier Field length
0000 hex 0003 hex
For details, refer to Exception Code on page 7-7 under Response Format for Error
Completion on page 7-7.
Byte-6 Byte-7 Byte-8
Unit Function Register address
identifier code
FF hex 10 hex
Byte-n
Description
Byte-6 Byte-7 Byte-8
Unit Function Register address
identifier code
FF hex 10 hex
Description
Byte-6 Byte-7
Unit Function
identifier code
FF hex 90 hex
Description
UHF RFID System V780-series Reader/Writer User's Manual (Z389)
Byte-9 Byte-10 Byte-11
Word count
4000 hex 2 bytes
Byte-9 Byte-10 Byte-11
Word count
2 bytes 2 bytes
Byte-8
Excep-
tion
code
1 byte