Mitsubishi FX3U-ENET Connection Guide for UDP

Introduction

The FX3U-ENET Ethernet module allows software, such as Fernhill SCADA, to monitor and control a Mitsubishi FX3U PLC Device.

This guide shows you how to set up a FX3U-ENET Ethernet module to use MC Protocol over UDP.

Using the FX3U-ENET Ethernet Module

The FX3U-ENET Ethernet module must be configured before it can accept connections from external software. The aim of this article is to guide you through the configuration process.

You can use either of these methods to configure the FX3U-ENET module:

Configure the FX3U-ENET Using FX Configurator-EN - Use a tool provided by Mitsubishi to configure the module.
Configure the FX3U-ENET With a Ladder Program - Use a ladder program to configure the module.

Once you have configured the FX3U-ENET module you can then Configure Fernhill SCADA.

Configure the FX3U-ENET Using FX Configurator-EN

Open FX Configurator-EN:
In the first Ethernet Module settings field, select Module 0:
Click Operational Settings to configure the module settings, the Operational Settings dialog opens:

Set the following parameters:
- Communication data code = Binary code
- Initial timing = Always wait for OPEN
- IP Address = 192.168.1.26 (or a suitable address for your network)
- Send frame setting = (Ethernet V2)
- TCP Existance [sic] confirmation setting = Use KeepAlive
Click END to close the Operational Settings dialog and return to FX Configurator-EN:
Click Open Settings to configure link settings, the Open Settings dialog opens:

Set link 1 to use these parameters:
- Protocol: TCP
- Open system: MELSOFT connection
Set link 2 to use these parameters:
- Protocol: UDP
- Fixed buffer: Receive
- Fixed buffer communication procedure: Procedure exist (MC)
- Pairing open: Pairing Disable
- Existence confirmation: No confirm
- Host station Port No (DEC): 5000
- Transmission target device IP address: 255.255.255.255
- Transmission target device Port No (DEC): 65535
Click END to close the Open Settings dialog and return to FX Configurator-EN:

If the Connection interface is not correct, click Transfer setup to configure the correct communication path to the PLC.
Click Write to open the Write to Ethernet Modules dialog:
Click Write to write the settings to the module, after a short delay the following warning dialog opens:
Click OK to re-initialize the module, when complete the Completed dialog opens:

Click OK to close the Completed dialog.

Configure the FX3U-ENET With a Ladder Program

If you do not have access to FX Configurator-EN you can configure the FX3U-ENET module using a ladder program.

The FX3U-ENET configuration is stored in the buffer memory (BFM) of the FX3U-ENET. You can write the configuration to the buffer memory of the module (BFM) using a ladder program.

As a minimum you will need to configure both the Operational Settings and the Open Settings.

Recommended Operational Settings:

Setting Name	BFM Number	Recommended Value
Communication Data Code	24 bit 1	0 - Binary
TCP Existence Confirmation	24 bit 4	1 - Use KeepAlive
Send frame setting	24 bit 5	0 - Ethernet V2.0
Initial Timing	24 bit 8	1 - Always wait for OPEN
IP Address	0 to 1

Recommended Open Settings:

Setting Name	BFM Number	Recommended Value
Fixed buffer	32 to 39 bit 0	1 - Receive
Existence confirmation	32 to 39 bit 1	0 - No Confirm
Protocol	32 to 39 bit 8	1 - UDP
Pairing open	32 to 39 bit 7	0 - No pairs
Fixed buffer communication	32 to 39 bits 9-10	10 - Procedure (MC)
Existence confirmation	32 to 39 bit 1	0 - No Confirm
Local station port no.	40, 47, 54, 61, 68, 75, 82, 89	5000 (1388h)
Destination IP address	41-42, 48-49, 55-56, 62-63, 69-70, 76-77, 83-84, 90-91	4294967295 (FFFFFFFFh) - 255.255.255.255
Destination port no.	43, 50, 57, 64, 71, 78, 85, 92	65535 (FFFFh) - Any

This example shows how to configure the FX3U-ENET module using an FX3U PLC program.

|                                                 |
| M8002          *<IP Addr 192.168.1.26           |
+--| |----+--------------[DMOV H0C0A8011A U0\G0]--+
|         |                                       |
|         +--------------------[MOV H110 U0\G24]--+
|         |                                       |
|         |      *<1:Melsoft Connection           |
|         +------------------[MOV H0A002 U0\G32]--+
|         |                                       |
|         |      *<2:Fernhill SCADA Connection  |
|         +--------------------[MOV H501 U0\G33]--+
|         |                                       |
|         +-------------------[MOV H1388 U0\G47]--+
|         |                                       |
|         +-------------[DMOV H0FFFFFFFF U0\G48]--+
|         |                                       |
|         +------------------[MOV H0FFFF U0\G50]--+
|         |                                       |
|         |      *<Write to flash ROM             |
|         +-------------------[MOV H9872 U0\G25]--+
|                                                 |
+------------------------------------------[END]--+

Program notes:

The M8002 contact is set once on the first scan, which ensures the configuration is written only on the first scan. After the first scan the program has minimal overhead.
The IP Address is set to 192.168.1.26
(write C0A8011Ah to BFM 0-1)
Binary mode, Keep alive enabled, Ethernet V2 and always wait for open
(write 110h to BFM 24)
Connection 1 is configured to accept TCP/IP connections from GX Developer
(write A002h to BFM 32)
Connection 2 is configured to accept UDP requests from Fernhill SCADA on port 5000 (1388h)
(write 501 to BFM 33, write 1388h to BFM 47, write FFFFFFFFh to BFM 48-49, write FFFFh to BFM 50)

For more information refer to FX3U-ENET User Manual.

Configure Fernhill SCADA

The easiest way to configure Fernhill SCADA is to use the Mitsubishi Melsec UDP Autodetect Wizard. Based on the options you select the wizard will try different IP Addresses and Port numbers until the module is found. If a module is found you will be given an option to automatically create the correct configuration to communicate with the module.

If the autodetect wizard is not suitable you can configure Fernhill SCADA manually:

Manual Configuration

To communicate with the FX3U-ENET Ethernet module configured as in the previous example:

Create a Mitsubishi Melsec UDP Channel tag.
Set these property values:

Property Value Comment

Host 192.168.1.26 The IP address of the FX3U-ENETEthernet module

Port 5000 The port number of link 2 in the FX3U-ENET Ethernet module
Create a Mitsubishi Melsec PLC Tag and associate it with the channel just created.

Property	Value	Comment
Host	192.168.1.26	The IP address of the FX3U-ENETEthernet module
Port	5000	The port number of link 2 in the FX3U-ENET Ethernet module

Further Information

Mitsubishi Melsec UDP channel

To learn about Mitsubishi Melsec UDP communication channels.

Mitsubishi Melsec UDP Autodetect Wizard

To learn about automatically detecting Mitsubishi PLC Devices using UDP.

Mitsubishi Melsec Driver

For information about the Mitsubishi Melsec Driver.

Glossary

For the meaning of terms used in Fernhill SCADA.