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PLC Inovance “Modbus RTU” PowerFlex 525 Tutorial

Written by plc247.com

Hello friends!
In previous posts, plc247.com showed you how to use PLC Inovance to connect and control many different types of inverters, today I will continue to guide you to control the Alen-Bradley PowerFlex525 inverter through “Modbus RTU” protocol.

Both the Inovance H3U-3232MT PLC and the Danfoss FC51 inverter have a built-in RS485 port that can support “Modbus RTU” communication.

PLC Inovance & PowerFlex 525 “Wiring Diagram”

PLC Inovance “Modbus RTU” Parameters Setting

To be able to control PowerFlex 525 inverter with Modbus-RTU, in addition to the basic parameters of the inverter (frequency, voltage, current …) we need to install additional communication parameters as follows:

PowerFlex 525 “Modbus-RTU” Registers Address

>>> Motor Control Address = 2000 (Hexa)

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

>>> Frequency Setting Address = 2001 (Hexa)

+ 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)

PLC Inovance Modbus-RTU Configuration

We have set up Modbus communication parameters for PowerFlex 525 inverter, we also set up for PLC Inovance H3U-3232MT the same.

PLC Programming

+ Add Modbus Configuration

+ Address Config & Programming

Project Video Tutorial

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References

+ PLC Inovance Programming Software Download
+ Allen-Bradley PowerFlex 525 Manual PDF Download

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