FAURE HERMAN FH8400, User Manual

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Chapter 5 : Modbus transmission tables
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Framework for the writing of "n" Modbus words (1 ≤ n ≤ 123)
Request
Slave
number
Function
code
(16)
Address
of the
1st word
Number
of words
(n)
Nb of
bytes in
words
Value of
the 1st
word
Value of
the last
word
CRC16
control
1 byte 1 byte 2 bytes 2 bytes 1 byte 2 bytes 2 bytes 2 bytes
Response
Slave
number
Function
code (16)
Address of
the 1st
word
Number of
words (n)
CRC16
control
1 byte 1 byte 2 bytes 2 bytes 2 bytes