7 - 49
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: Command Error
Execution Examples
Execution for Reading ID Data from Multiple RF Tags with no Option Specification
Example 1: Execution When Four RF Tags Are in the Communications Range
TX: 000000000006FF6400030000
RX: 000000000116FF6400030004
00003000AAAA…AAAA0000…0000:
RF Tag A error code + St UII (EPC code) (The
six words of the UII (EPC) length are all AAAA hex.)
00003000BBBB…BBBB0000…0000:
RF Tag B error code + St UII (EPC code) (The
six words of the UII (EPC) length are all BBBB hex.)
00003000CCCC…CCCC0000…0000:
RF Tag C error code + St UII (EPC code) (The
six words of the UII (EPC) length are all CCCC hex.)
2002000000000000000000…0000:
RF Tag D error code (2002 hex (RF Tag communications
failure))
Example 2: Execution When an RF Tag Is Not in the Communications Range (Exception Code: 04
Hex (Failure in Device))
TX: 000000000006FF6400030000
RX: 000000000003FFE404
Information
from RF Tag
1
Error code
For details, refer to
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.
Options
These parameters may be omitted depending on the option value.
Reception
level
The reception level is attached in signed 4-digit hexadecimal.
FFFF to FF9D hex (-1 to -99 [dBm])
Reader/Writer
Number
This displays the Reader/Writer number of the reader/writer communi-
cating 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
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
Parameter
Description
Summary of Contents for V780 Series
Page 22: ...Version Upgrade Information 20 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Page 60: ...3 Part Names and Functions 3 14 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Page 152: ...6 Functions 6 76 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Page 334: ...8 Browser Interface 8 44 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Page 358: ...9 Troubleshooting 9 24 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Page 392: ...Appendices A 30 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Page 393: ...I 1 I UHF RFID System V780 series Reader Writer User s Manual Z389 Index ...
Page 397: ......