Omron V780 Series, User Manual

Page: 176 / 398

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