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160
Se
ct
io
n 7
Mo
dbus
Commun
ic
a
tion
s
Prot
ocol
RFID System
User's Manual
(Modbus TCP)
Section 7
Host Communications Specifications
Response Format
Normal End
Transaction Identifier
A copy of the value that was specified in the query is returned.
Protocol Identifier
This field is always 0000 hex.
Field Length
The number of bytes inclusively from the unit identifier through the end of the data is specified.
Byte 4 will always be 00 hex.
Unit Identifier
This field is always FF hex.
Function code
The value that was specified in the query (Read: 03 hex or Write: 10 hex) is set.
Data
The data for the function code is sent.
The format of the data depends on the function code.
The Reader/Writer supports the following data type.
Function code
Function
03 hex
Read Holding Register
10 hex
Write Holding Register
Data name
Description
Holding register
Read/write 16-bit data
Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Byte 8
Byte 9
···
Byte n
Transaction
identifier
Protocol identifier
Field length
Unit
identifier
Function
code
Data
Copy of the transaction
identifier that was specified
in the query
Always 0000 hex
Always
00 hex
No. of
bytes
Always
FF hex
Range specified with the field length
Содержание V680S Series
Страница 16: ...14 RFID System User s Manual Modbus TCP Introduction Introduction MEMO ...
Страница 58: ...56 Section 1 Data Characteristics RFID System User s Manual Modbus TCP Section 1 Product Overview MEMO ...
Страница 64: ...62 Section 2 System Configuration RFID System User s Manual Modbus TCP Section 2 System Configuration MEMO ...
Страница 72: ...70 Section 3 Component Names RFID System User s Manual Modbus TCP Section 3 Component Names MEMO ...
Страница 242: ...240 Section 8 Operation Interface RFID System User s Manual Modbus TCP Section 8 Web Browser Interface ...
Страница 337: ...Index 335 RFID System User s Manual Modbus TCP Index ...
Страница 342: ...340 RFID System User s Manual Modbus TCP MEMO ...
Страница 343: ......