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7 Modbus/TCP Communications
7 - 44
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
Function
This command reads data from the RF Tag in the communications range.
You can specify reading up to 2,048 words with one EXTENDED DATA READ command.
Command Format
Response Formats
• Normal Response
7-6-3
Modbus Expansion Communications Commands
EXTENDED DATA READ
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
Subfunction code
Read area start
address
X
X
0000 hex
000A hex
FF hex
64 hex
0001 hex
2 bytes
Byte-12
Byte-13
Byte-14 Byte-15
Read size
Options
2 bytes
2 bytes
Parameter
Description
Subfunction code
0001 hex: EXTENDED DATA READ
Read area start address
Specify in 4-digit hexadecimal the start address for reading data.
Setting ranges (word address specifications)
0000 to 07FF hex: Reserved area
1000 to 17FF hex: UII (EPC) area
2000 to 27FF hex: TID area
3000 to 3FFF hex: User area
Read size
Specify in 4-digit hexadecimal the start address for reading data.
Setting range: 0001 to 0800 hex (2,048 words max.)
Options
For details, refer to
7-3 RF Communications Command Options
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
Subfunction code
Error code
X
X
0000 hex
2 bytes
FF hex
64 hex
0001 hex
0000 hex
Byte-12
...
...
...
...
...
...
...
...
...
...
...
Byte-n
Read data
Options
1 to 2,048 words
(2 to 4,096 bytes)
0 to 70 bytes
StoredPC
UII (EPC code)
Reception level
Diagnostic
results
Reader/Writer
Number
2 bytes
62 bytes
2 bytes
2 bytes
2 bytes
Note The contents depend on the options specified in the command.
Содержание V780 Series
Страница 22: ...Version Upgrade Information 20 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Страница 60: ...3 Part Names and Functions 3 14 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Страница 70: ...4 Installation and Connections 4 10 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Страница 76: ...5 Preparations for Communications 5 6 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Страница 152: ...6 Functions 6 76 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Страница 334: ...8 Browser Interface 8 44 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Страница 358: ...9 Troubleshooting 9 24 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Страница 362: ...10 Maintenance and Inspection 10 4 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Страница 392: ...Appendices A 30 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Страница 393: ...I 1 I UHF RFID System V780 series Reader Writer User s Manual Z389 Index ...
Страница 397: ......