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COMMUNICATION PROCEDURE5
5 - 1
5
MELSEC-F
5 COMMUNICATION PROCEDURE
This chapter gives an overview of the communication procedure using the Ethernet
module, as well as the required initial processing of the Ethernet prior to data
communication and the open processing for communication with an external device.
The sequence program can be effectively simplified by setting the parameters of the
Ethernet module supported by FX Configurator-EN.
5.1 Overview of the Communication Procedure
This section gives an overview of the procedure for performing data communication
with external devices via the Ethernet module.
• Start data communication by establishing connections with external devices via the
initial or open processing.
• End data communication by closing the connection, and, as a result, terminating all
communication processing.
The following diagram illustrates the communication procedure:
(There is no connection since UDP/IP does not have a notion of connection.)
Open processing
Set parameters for the
Ethernet module using sequence
program or FX Configurator-EN
Start the PLC and Ethernet
module
Automatically processed.
Ethernet module initial processing
See
Section
5.6.
MELSOFT
connection
E-mail
sending/
receiving
Communication
using
the MC
protocol
Communication
using
fixed
buffers
Close processing
See
Section
5.6.
See Section 4.6, "Operational Settings."
See Section 5.2, "Initial Processing.
See Section 5.3, "Router Relay Parameter."
See Section 5.5, "Open Settings."