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DELTA DVP 14SS2 “Modbus RTU” INVT Goodrive 20 VFD

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Hello everyone, today would like to introduce to you an article on how to connect PLC Delta with INVT inverter via Modbus RTU-RS485 communication standard.

The PLC I use is the DVP-14SS2 and the INVT Goodrive 20 inverter. These are probably two devices that are extremely popular in small machines, such as packaging machines, conveyors because of their extremely low cost and high efficiency. pretty good quality.

DVP-14SS2 & INVT GD20 “Wiring Diagram”

Note: If the communication distance is greater than 50m, a 120Ω terminal resistor should be used

INVT Goodrive 20 Communication Setting

In addition to the basic settings of the inverter (frequency, voltage, current) we need to set the following parameters so that the inverter can be controlled by Modbus-RTU

+ P00.01 = 2 (Communication running command)

+ P00.06 = 8 (The frequency is set by MODBUS)

+ P00.09 = 0 (Select A frequency)

+ P14.00 = 1 (Slave Number.1)

+ P14.01 = 3 (9600bps)

+ P14.02 = 1 (Digital bit checkout E,8,1 RTU)

+ P14.03 = 5 (Communication answer delay)

+ P14.04 = 0.0 (Communication overtime fault time)

Register Control

+ Motor Control Address = 2000 (Hexa)

  • Set 2000 (Hex) = 1 >>> Motor Run Forward
  • Set 2000 (Hex) = 2 >>> Motor Run Reverse
  • Set 2000 (Hex) = 5 >>> Stop

+ Frequency Setting Address = 2001 (Hexa)

Register Monitoring

DVP-14SS2 Communication Setting

WPLSoft supports automatic configuration of communication parameters in the following section:

PLC Programming

+ Modbus Communication Setting

+ Read/Write Distribution

+ Frequency Write Command

+ Motor Control Command

+ Data Monitoring

Video Tutorial


Software & Documention Requirements

+ WPLSoft for PLC Delta DVP 14SS2 Programming

+ INVT Goodrive 20 Manual PDF

(Password Extract:

If you have any questions during the implementation of this project and need help, please comment below the article, will answer you as soon as I read it.

Best Regards!

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