Communication Procedure; Overview Of The Communication Procedure - Mitsubishi MELSEC-F User Manual

5 COMMUNICATION PROCEDURE

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 (GX Developer).
The following explains the communication procedure using FX Configurator-EN (GX
Developer).

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
• End data communication by closing the connection, and, as a result, terminating all
Open processing
Communication
using
the MC
protocol
Close processing
5 - 1
initial or open processing.
communication processing.
The following diagram illustrates the communication procedure:
(There is no connection since UDP/IP does not have a notion of connection.)
Set parameters for the
Ethernet module using sequence
program or FX Configurator-EN
(GX Developer)
Start up the PLC
Ethernet module initial processing
See
Section
5.6.
Communication
using
fixed
buffers
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."
Automatically processed.
E-mail
MELSOFT
sending/
connection
receiving
MELSEC-F
5
5 - 1