Mitsubishi FX3U “Modbus RTU” DELTA MS300 VFD

Hi. In previous posts, plc247.com has instructed you to use a number of HMIs/PLCs to control Delta MS300 inverters via RS485 Modbus-RTU.

Today I would like to continue to guide you to use another common PLC to control it: Mitsubishi FX3U PLC combined with FX3U-485ADP-MB Module

Wiring Diagram

Setting DELTA MS300 VFD Parameters

If using Modbus-RTU to control the inverter, we set the communication parameters as follows:

• P00.20: 1 (Using Modbus Setting Frequency)
• P00.21: 2 (Using Modbus Control Motor)
• P09.00: 1 (Slave Address = 1)
• P09.01: 9.6 (Baudrate = 9600bps)
• P09.02: 0
• P09.03: 1.0 (Overtime Com. = 1.0s)
• P09.04: 14 ( Modbus-RTU 8/E/1 Selection)

Control Register Address

>>> Motor Control Address = 2000 (hex)

+ Set Word 2000 = 18 (dec): Forward Run

+ Set Word 2000 = 34 (dec): Reverse Run

+ Set Word 2000 = 1 (dec): Motor Stop

>>> Setting Frequency Address = 2001 (hex)

Register Monitoring Address

>>> Output Frequency Address = 2103 (hex)

>>> Output Current Address = 2104 (hex)

>>> Output Voltage Address = 2106 (hex)

Mitsubishi FX3U Programming

+ FX3U Ch2 Communication Setting

+ Read/Write Distribution

+ Setting Frequency

+ Motor Control Command

+ Data Monitoring Command

Project Tutorial Video

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Documentation and supporting software:

• GX Works Software for PLC Mitsubishi Programming
• MS300 DELTA VFD Manual PDF

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