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7 Modbus/TCP Communications
7 - 50
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
Function
This command reads data from multiple RF Tags in the communications range.
You can get data from more than one RF Tag with one EXTENDED MULTIACCESS DATA READ
command.
Command Format
Response Formats
• Normal Response or Error Response: RF Tag Communication Error
EXTENDED MULTIACCESS 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
0004 hex
2 bytes
Byte-12 Byte-13 Byte-14 Byte-15
Read size
Options
2 bytes
2 bytes
Parameter
Description
Subfunction code
0004 hex: EXTENDED MULTIACCESS 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 0020 hex (1 to 32)
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
Number of RF
Tags (m)
X
X
0000 hex
2 bytes
FF hex
64 hex
0004 hex
0000 to 0040 hex
Byte-12
...
Byte-12 + n - 1
...
Byte-12+n*
(m-1)
...
Byte-12+
(n*m)-1
Information from RF Tag 1
...
Information from RF Tag m
n = 4 to 134 bytes
...
n = 4 to 134 bytes
Information from RF Tag x
Error code
Read data
Options
2 bytes
2 to 64 bytes
0 to 66 bytes
StoredPC
UII (EPC
code)
Reception
level
Reader/Writer
Number
2 bytes
62 bytes
2 bytes
2 bytes
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: ......