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Mitsubishi FX5U “Modbus RTU” Hitachi NE-S1 Tutorial

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PLC Mitsubishi FX5U is a new type of PLC that was born to replace FX3U. FX5U PLC has 1 built-in Ethernet port, 1 RS422/485 port and Analog Input for convenient connection and communication to peripheral devices.

Today will guide you to use the Mitsubishi FX5U PLC used to control and monitor the Hitachi NE-S1 Inverter via “Modbus RTU”, both devices have a built-in RS485 port, so we have You can connect them directly without having to buy any additional Modules.

Mitsubishi FX5U & Hitachi NE-S1 “Wiring Diagram”

+ Connection Diagram

+ Hitachi NE-S1 “SW5 Modbus RTU Selection”

Hitachi NES1 Parameters Configuration

Below is a table of communication parameters that need to be set up for Hitachi NE-S1 to be able to control it with Modbus RTU.

Hitachi NES1 Modbus Registers Address

+ This is the address table of the main “Coils and Registers” that we need to control and monitor the Hitachi NES1 Inverter

PLC Mitsubishi FX5U “Modbus RTU” Setting

In order for us to be able to use the Mitsubishi FX5U PLC to control the Hitachi NE-S1 Inverter via Modbus RTU, we need to set the communication parameters of the PLC to be the same as the VFD.

FX5U PLC Programming

+ Auto Read/Write Distribution

+ VFD Set Frequency

+ VFD Run / STOP Control

+ VFD Direction Control

+ VFD Reset Control

+ Frequency Output Monitor

+ Current Output Monitor

+ Voltage Output Monitor

Project Video Tutorial


Related Software and Documents

>>> Download FX5U Programming Software
>>> Hitachi NE S1 Manual PDF Download

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If you have any problems or questions during the process of using the FX5U PLC to control the Hitachi NES1 Inverter, please comment below the article, will answer you as soon as I read the comments.

Best Regards!

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