Huanyango

This Go-library can control Huanyang VFD (variable frequency drive) as used in CNC applications. Here a serial port is used to send and receive the MODBUS-alike control messages.

Note: This is not an project owned by Huanyang Electrical Co. Limited.

Installation

go get -u github.com/itschleemilch/huanyango/v1/vfdio

Setup

                    +----------------------+                      +--------------------+
                    |                     B+---.  .---..---.  .---+ RS-                |
+-------------+     |      RS485           |    \/    /\    \/    |       Huanyang VFD |
| RPI 3    USB+-----+ Serial Interface    A+----..---.  .---..----+ RS+                |
+-------------+     |                      |                      +--------------------+
                    |                   GND+--------------------
                    +----------------------+
                                             Shielded Twisted Pair
                                             (GND single ended)

Required VFD settings:

# Enable RS485 Interface:
PD163 Communication Addresses   := 1

# Set baud rate to 9600 baud
PD164 Communication Baud Rate   := 1

# Set 8 data bytes, no party, one stop bit, RTU mode:
PD165 Communication Data Method := 3

OS support

This library and examples were developed on a Raspberry PI 3. The used serial interface library claims to support OS X, Linux and Windows - but this is untested. See go-serial OS support.

Simple demo application

go get -u github.com/itschleemilch/huanyango/v1/cmd/huanyango-cli-demo

Example usage:

pi@rpi_cnc:~/go/bin $ ./huanyango-cli-demo
Huanyango Command Line Interface Demo
Commands: M3, M4, M5, Snnnn, ?, $, exit, help
> M3 S250
> ?
> Output RPM 1/min:  249
> $
> Commands: M3, M4, M5, Snnnn, ?, $, exit, help
> M4
> M5
> exit
> End.

A help text is provided when entering ./huanyango-cli-demo -h.

Further reading

1. HY Series Inverter Manual
2. Huayang VFD manual (older version with MODBUS details)

• Source 1
• Source 2

3. Windows Control App