Thousands of people are using Huanyang VFD's with modbus plugins, so I don't believe that modbus support in the VFD has been an issue for many years

Gerry, I hope that is correct. But as far as I know Mach 3 only works with HuanYang VFDs using an unsupported, closed source driver.
I have not found any instructions for setting up Mach 4 with a HuanYang VFD.

The Mach 4 documentation does not cover modbus -- the "Mach 4 Scripting Manual" ends with a heading reading "Modbus" with no content following it.

I'm not trying to be snarky, and I would love to have answers to any of the three questions I asked in my original post.

I'm an experienced software developer and I have the documentation for HuanYang VFDs -- if there is any documentation about writing modbus drivers for Mach4 I would be interested in having a crack at it.

Tgdavies;

I believe many are using HY VFD's with MACH4, but just not using MODBUS.  The are using other speed/ direction control methods supported by HY's. 

I would like to use MODBUS to get feedback from the VFD.
I don't have the manual with me but they are solutions such as/ similar to:

- zero to ten volt analog
- continuous digital pulse (similar to step/ direction)

There are many posts to show how these methods are accomplished.

Typing this on a phone so apologies for typos.

As far as I know, there is currently no way to control a Huanyang VFD via modbus in Mach4. It would require someone writing a new custom plugin, as the Huanyang does not use standard Modbus.

So, the answer to your questions are:

1) No
2) Use an analog 0-10V speed control board. You can get either step/dir or PWM versions. Many breakout boards have these built in.
3) No

For YaNvrNo,

Couldn't find the diagram or the chip but I was able to find the posts on the subject:

+  Machsupport Forum
|-+  Mach Discussion
| |-+  Mach SDK plugin questions and answers.
| | |-+  Finished Plugins for Download
| | | |-+  Huanyang VFD controller plugin

page 24, response 230


Which has a pic of the board as it should be and I took a pic of my VFD today which shows the missing u4 chip.

HTH

RT

Folks

In case it's any use to anyone developing a Mach 4 plugin, here's a link to a Windows application I wrote a few years ago to control the HuanYang VFD I had at the time.

I haven't done any further development on it (I had to Google it myself to see where I'd uploaded it to!) as I got rid of the HuanYang kit and invested in a FRENIC Mini.

Code written in C# with Visual Studio

https://github.com/GilchristT/SpindleTalker2/releases

Tommy

Excellent info TommyG - thanks for posting.

Tweakie.

TommyG;

That is exactly were I landed - swap out the VFD: I felt I would always be trying to make the HuanYang VFD work whenever software changed, so I decided to just update the VFD if/ when I upgrade to M4.

Thanks tommyg for the posting of the link. I was able to get my HY VFD running using the spindle talker over RS485. I also have also tried to use the  voltage output from my Gecko G540 wired up to use M4 controls, but having some configuration issues in Mach. I do like the current output feature of the spindle talker app....

this is something i am trying to do, i was able to make my huangyang work with spindle talker 2 and with 0-10v but it would be nice to have modbus working. i dont even know where to start with writing a plugin or how the modbus is supposed to work

Mach 4 ile Modbus üzerinden HuanYang VFD’yi kontrol etmekle ilgili deneyimlerimi paylaşmak istiyorum. Bu süreci öğrenirken birçok kaynak inceledim ve Daha Fazla Oku bağlantıları sayesinde detaylara ulaşmak oldukça kolay oldu. Başta karışık gibi görünse de doğru ayarlarla her şey sorunsuz çalışıyor. Özellikle Modbus adreslemeleri ve Mach 4 ayarlarının uyumlu olması kritik. HuanYang VFD’lerin esnekliği sayesinde motor kontrolünü çok daha verimli hale getirebildim. Geriye dönüp baktığımda bu entegrasyonun hem zaman kazandırdığını hem de sistemimi daha profesyonel hale getirdiğini görüyorum. Herkese tavsiye ederim.