Omron V780 Series, User Manual

Page: 199 / 398

7 - 47
7 Modbus/TCP Communications
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7-
6 V780 Co
mm
and
Detail
s
7
7-6
-3 Modbu
s Expansion C
ommunications Commands
• Error Response: RF Tag Communications Error
• Error Response: Command Error
 Execution Examples
Writing 2,048 Words of Data Starting from Word Address 0000 Hex (User Area) in the RF Tag with
No Options
Example 1: Execution When an RF Tag Is Not in the Communications Range (Error Code: 0000
(Normal Completion))
TX: 00000000100AFF64000230001111222233334444…FFFF0000
RX: 000000000006FF6600010000
Example 2: Execution When an RF Tag Is Not in the Communications Range (Error Code: 2001 Hex
(RF Tag Missing Error))
TX: 00000000100AFF64000230001111222233334444…FFFF0000
RX: 000000000006FF640002200
Parameter Description
Field length Normal completion: 0006 hex + Option size
• For details on option sizes, refer to
7-3 RF Communications Command
Options on page 7-10.
Error code For details, refer to 9-2-1 Command Errors on page 9-4.
Options These parameters may be omitted depending on the option value.
StoredPC Gives the StoredPC data in 4-digit hexadecimal.
The upper 5 bits are the UII (EPC) word length.
UII (EPC code) Gives the Tag-specific information according to Gen2 standards.
All bytes of the UII (EPC code) section that exceed the UII (EPC) word length
in the StoredPC are filled with 00 hex.
Reception level The reception level is attached in signed 4-digit hexadecimal.
FFFF to FF9D hex (-1 to -99 [dBm])
Diagnostic results Gives the diagnostic results in 4-digit hexadecimal.
For details, refer to
Response Formats on page 7-136 under GET COMMUNI-
CATIONS DIAGNOSTIC INFORMATION on page 7-136.
Reader/Writer
Number This displays the Reader/Writer number of the reader/writer communicating
with the RF Tag in 4 hexadecimal digits.
0000 hex to 0007 hex
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 iden-
tifier
Protocol identifier Field length Unit
identifier
Function
code
Subfunction code Error code
X X 0000 hex 0006 hex FF hex 64 hex 0002 hex 2 bytes
Parameter Description
Error code For details, refer to 9-2-1 Command Errors on page 9-4.
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 E4 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.