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Se
ct
io
n 7
Mo
dbus
Commun
ic
a
tion
s
Prot
ocol
Section 7
Host Communications Specifications
161
RFID System
User's Manual
(Modbus TCP)
Error 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
A value of 80 hex is added to the value that was specified in the query and set.
Exception Code
A code that provides information on the error is attached.
Exception code
Meaning
01 hex
Illegal function
02 hex
Illegal data address
03 hex
Illegal data value
04 hex
Failure in slave device
06 hex
Slave device busy
Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Byte 8
Transaction
identifier
Protocol identifier
Field length
Unit
identifier
Function
code
Exception
code
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: ......