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PLC Inovance “Modbus RTU” Delta VFD M Tutorial

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Delta VFD-M inverter is a device used to change the frequency of alternating current. Compact design, suitable for small and medium capacity applications. Helps reduce noise during operation and reduce electrical interference.

Delta VFD-M also has built-in RS-485 communication interface which makes it can be controlled and monitored using Modbus RTU protocol, and today will use PLC Inovance to control it using this protocol.

PLC Inovance & Delta VFD-M “Wiring Diagram”

For Delta VFD-M inverter, RS485 port is RJ11 Port (6pin), you can use desk phone jack to connect

Delta VFD-M “Modbus RTU” Parameters Setting

In addition to the basic parameters of the inverter installed according to the motor (frequency, voltage, current …) to be able to control Delta VFD-M by Modbus RTU protocol, we need to install additional following communication parameters

  • P00 = 03 (Frequency Set by RS485)
  • P01 = 04 ( Control by RS485)
  • P88 = 01 (Slave Address)
  • P89 = 01 (Baudrate 9600bps)
  • P92 = 04 ( Mode 8/1/Even)
  • P157 = 01 (Modbus-RTU Selection)
Delta VFD-M Modbus Registers Address

>>> Control Motor Address = 2000 (Hexa)

  • Set Word 2000 = 0000 0000 0001 0010 (Bin) = 18 (Dec) >>> Forward Run
    = 0000 0000 0010 0010 (Bin) = 34 (Dec) >>> Reverse Run
    = 0000.0000.0000.0001 (Bin) = 1 (Dec) >>> Stop

>>> Frequency Reference Address = 2001 (Hexa)

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

PLC Programming

+ PLC Inovance “Modbus RTU” Configuration

+ Address Configuration & Programming

Project Video Tutorial


Related Software and Documents

+ Inovance PLC Programming Software Download
+ Delta VFD-M Inverter Manual PDF Download

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