Skip to content

Arduino Shield V2

Jump to bottom
Alexander Brown edited this page May 31, 2017 · 3 revisions

In order for the Arduino to work with the VFD, a shield had to be custom created. On the VFD, there is a series of inputs for the external control of the VFD. Below is an annotated image of the VFD with pins labeled for what they do.

IMPORTANT: for the external control of the VFD, PLC must be connected to L. Also, setting A001 and A002 on the VFD must be set to 01.

The circuit, JOAQUIN FILL THIS IN

The Magnitude signal from the arduino is a PWM pulse, which, when tested, did not provide a smooth output frequency from the VFD. A simple RC filter was put in place to filter the PWM signal from the arduino so it behaves more like an analog signal. When tested, this filter performed well, and resulted in a smooth frequency signal coming from the VFD.

###Important Pins###

  • Pin 9 - FWD command
  • Pin 10 - REV command
  • Pin 11 - Magnitude (speed) command
  • Pin A0 - Analog read from on-board potentiometer
  • Pin 5 - Encoder signal
  • Pin 6 - Encoder signal

Links for these materials can be found in the Bill of Materials Digikey spreadsheet. NOTE: the transistors on this bill of materials sheet are the wrong transistors. The correct transistors are located on the Digikey_4-23 spreadsheet.

Panel controls used are available as a digikey cart here

Depending on how the arduino is programmed, this shield can be used for both open loop and close loop control. For open loop control, the potentiometer acts as both direction and speed control. The code for this open loop control is contained in the repository here

###Materials### The following are required for each shield:

  • 2 - Tip42c PNP transistor
  • 2 - Tip41c NPN transistor
  • 3 - 220kOhm resistor
  • 2 - 10kOhm resistor
  • 1 - 10kOhm linear potentiometer
  • 1 - 1microF capacitor

Clone this wiki locally