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MELSEC-F
3 SPECIFICATIONS
3.4 Ethernet Module Function List
This section shows a list of Ethernet module functions.
(1) Basic functions of the Ethernet module
The Ethernet module can perform the communications shown in the table below
via TCP/IP or UDP/IP communication.
Function Description
Reference
section
Communication using
MC protocol
Subset of a
compatible 1E
frame
Reads/writes PLC data from/to an external device.
Chapter 8, 9
Procedure exist
Chapter 6
Communication using
the fixed buffer
No procedure
Sends/receives arbitrary data between the PLC and the
external device using the fixed buffer of the Ethernet module.
Chapter 7
Sending/receiving e-mail
Sends/receives data via e-mail.
• Sending/receiving by the PLC
Chapter 10
(2) Additional functions of the Ethernet module
The following table lists the additional functions of the Ethernet module that can
be used.
Function Description
Reference
section
Router relay communication (router relay
function)
Performs data communication via a router or gateway. (The router
relay function is not a function by which the Ethernet module works as
a router.)
Section 5.3
Existence check of external device (Existence
check function)
Checks whether or not the external device is working normally after a
connection is established (open processing).
Sections 5.2.2 and 5.5
Communication via pairing open
Pairs and then opens a reception connection and a transmission
connection (for fixed buffer).
Section 5.7
Connecting MELSOFT products (GX
Developer, etc.)
MELSOFT products (GX Developer, etc.) are connected via TCP/IP
communication. It is also possible to connect multiple MELSOFT
products simultaneously.
Section 1.2 (3)
Manual of each
MELSOFT product
(3) Status check of the Ethernet module
Checks that the Ethernet module is working and can communicate normally.
Function Description
Reference
section
Self loopback test
Checks the Ethernet module’s sending/receiving function and line
connection status.
Section 4.7.1
Hardware test
Tests the RAM and ROM of the Ethernet module.
Section 4.7.2
Communication error storage
When a data communication error occurs, this function stores the error
information (error log), including the message subheader and IP
address of the external device for a maximum of 16 pairs in the buffer
memory.
Chapter 11
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