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Danfoss FC302 “Modbus RTU” via Modbus Poll Tutorial

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The Danfoss FC302 is a high-end versatile inverter that can be used in almost any application. It also supports most basic communication protocols including 1 RS485 port and Modbus RTU support.

BToday will guide you to control Danfoss FC302 with an extremely light and simple software on your computer, Modbus Poll software. We need to prepare 1 “USB to RS485” Cable

Computer & Danfoss FC302 “Connection Diagram”

Danfoss FC302 Modbus-RTU Configuration

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

Danfoss FC302 Registers Address

>>> VFD Control Address = 49999

  • Set Word = 1148 (dec) >>> Run Forward
    = 33916 (dec) >>> Run Reverse
  • Set Word = 1084 (dec) >>> Stop
  • Set Word = 1212 (dec) >>> VFD Reset

>>> VFD Speed Setting Address = 50009
Setting Reference = 0 to 16384(dec) ~ (0 to 100%)

Note: Danfoss FC302 Monitoring Address
= “(Table Address*10) – 1
  • Voltage Output Address = 16119
  • Frequency Output Address = 16129
  • Current Output Address = 16139
  • Speed Output Address = 16169

Danfoss FC302 Modbus Example

+ Speed Setting Command

+ VFD Control Command

+ Read Volatge Output

+ Read Frequency Output

+ Read Current Output

+ Read Speed Output

Video Tutorial


Related Software and Documents

>>> Modbus Poll Free Download Software
>>> Danfoss FC302 Manual PDF Download

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If in the process of making the connection between Modbus Poll and Danfoss FC302 you need any help, please comment below the article, will reply to you as soon as I read the comment.

Best Regards!

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