Relevant Manuals; Terms; Generic Terms And Abbreviations - Mitsubishi Electric MELSEC iQ-R Series Reference Manual

Modbus and modbus/tcp
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RELEVANT MANUALS

Manual name [manual number]
MELSEC iQ-R MODBUS and MODBUS/TCP
Reference Manual
[BCN-P5999-1060] (this manual)
e-Manual refers to the Mitsubishi Electric FA electronic book manuals that can be browsed using a dedicated
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e-Manual has the following features:
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• The hardware specifications of each part can be found from the product figures.
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• Sample programs can be copied to an engineering tool.

TERMS

Unless otherwise specified, this manual uses the following terms.
Term
Master
MODBUS device
Request message
Response message
Slave

GENERIC TERMS AND ABBREVIATIONS

Unless otherwise specified, this manual uses the following generic terms and abbreviations.
Generic term/abbreviation
C24
FC
SC
Description
Protocol (MODBUS, MODBUS/TCP) that reads and writes data from a target
device to a module
Description
A name for the side that requests function execution
A device used in communications via the MODBUS protocol
A message that requests function execution to slaves.
In the MODBUS protocol, the master requests function execution to the slaves.
A message that returns execution results of functions from a slave to the master
A name for the side that processes execution requests from the master and returns the execution results
Description
A MELSEC iQ-R series serial communication module
An abbreviation of function code
An abbreviation of sub code
Available form
e-Manual
PDF
5

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