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4
MODBUS STANDARD FUNCTIONS
4.3.6 Write single register (FC: 06)
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Writes a value to one holding register.
(1) Request message format (Master → Slave)
Function code
Holding register number
Function code
(06
)
(0000
H
(H)
(2) Response message format (Slave → Master)
(When completed normally)
The slave returns the request message received from the master as it is.
(When completed with an error)
Function code
Function code
Exception
(86
)
H
: When completed with an error, the exception code and error code are stored
into the buffer memory.
Refer to Section 11.3 for the storage location, confirmation method and more
details.
Number of accessible devices with one message
Data
to FFFF
)
(0000
H
H
(L)
(H)
Data
code*
1 point
Write data
to FFFF
)
H
H
(L)
MELSEC-Q
4 - 11
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