5
RELEVANT MANUALS
e-Manual refers to the Mitsubishi Electric FA electronic book manuals that can be browsed using a dedicated
tool.
e-Manual has the following features:
• Required information can be cross-searched in multiple manuals.
• Other manuals can be accessed from the links in the manual.
• The hardware specifications of each part can be found from the product figures.
• Pages that users often browse can be bookmarked.
• Sample programs can be copied to an engineering tool.
TERMS
Unless otherwise specified, this manual uses the following terms.
GENERIC TERMS AND ABBREVIATIONS
Unless otherwise specified, this manual uses the following generic terms and abbreviations.
Manual name [manual number] Description Available form
MELSEC iQ-R MODBUS and MODBUS/TCP
Reference Manual
[BCN-P5999-1060] (this manual)
Protocol (MODBUS, MODBUS/TCP) that reads and writes data from a target
device to a module
e-Manual
PDF
Term Description
Master A name for the side that requests function execution
MODBUS device A device used in communications via the MODBUS protocol
Request message A message that requests function execution to slaves.
In the MODBUS protocol, the master requests function execution to the slaves.
Response message A message that returns execution results of functions from a slave to the master
Slave A name for the side that processes execution requests from the master and returns the execution results
Generic term/abbreviation Description
C24 A MELSEC iQ-R series serial communication module
FC An abbreviation of function code
SC An abbreviation of sub code
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