Mitsubishi FX5U “Modbus RTU” PowerFlex 525 Tutorial

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The Powerflex 525 inverter is a series of Rockwell’s 520 inverter series, which is the new generation of Component inverters from Allen-Bradley. It supports many control and Communication methods such as Ethernet/IP, RS485…

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Today plc247.com will guide you to use PLC Mitsubishi FX5U to control Allen-Bradley PowerFlex 525 through Modbus RTU (RS485)

FX5U & PowerFlex 525 “Connection Diagram”

Note: Use a 120Ω terminal resistor if the communication distance is far

Allen-Bradley PowerFlex 525 Modbus-RTU Setting

In addition to the basic parameters of the inverter installed according to the motor (Frequency, current, voltage…) then we need to install the following communication parameters

PowerFlex-525 Registers for Control

>>> VFD Control Address = 2000 (Hexa)

• Set Word 2000 = 18 >>> Motor Forward Start
  = 34 >>> Motor Reverse Start
  = 1 >>> Stop
  = 8 >>> VFD Fault Reset

>>> VFD Frequency Reference Address = 2001 (Hexa)

PowerFlex-525 Registers for Monitoring

• Frequency Command Address = 2102 (Hexa)
• Output Frequency Address = 2103 (Hexa)
• Output Current Address = 2104 (Hexa)
• DC-BUS Voltage Address = 2105 (Hexa)
• Output Voltage Address = 2106 (Hexa)

Mitsubishi FX5U Modbus RTU Configuration

So that FX5U can connect and control the inverter, we need to set the same communication parameters as Allen-Bradley PowerFlex 525 VFD.

PLC Programming

+ Communication Distribution

+ Frequency Setting & Motor Control Command

+ Read Data Response

Detailed Instruction Video

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Related Software and Documents

>>> Mitsubishi GX-Works3 Software Free Download

>>> Allen-Bradley PowerFlex 525 Manual PDF Download

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