# Huanyang VFD to Controller

**URL:** <https://forum.onefinitycnc.com/t/huanyang-vfd-to-controller/8589>\
**Category:** Troubleshooting (X35/X50)\
**Created:** [October 30, 2021, 2:39am UTC](https://forum.onefinitycnc.com/t/huanyang-vfd-to-controller/8589 "2021-10-30T02:39:25Z")\
**Posts on this page:** 1\
**Showing post:** 39

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**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\
**Post date:** [November 17, 2021, 9:32pm UTC](https://forum.onefinitycnc.com/t/huanyang-vfd-to-controller/8589/39 "2021-11-17T21:32:51Z")

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Hey Jim,

as you stated [here](https://forum.onefinitycnc.com/t/a-mans-got-to-know-his-limitations/8930/33), this jumper does not affect the serial communication between VFD and Onefinity Controller.

Nonetheless this jumper, which could not be found in the [Huanyang Manual](https://buildbotics.com/upload/vfd/Huanyang-VFD-manual.pdf) that can be found at Buildbotics or at [Automation Technologies Inc.](https://www.automationtechnologiesinc.com/products-page/vfds/kl-vfd22), is of great importance for all who have a Huanyang VFD Model with a potentiometer on the Front panel:

 ![IMG_3353 __Huanyang_Jumper_VI_VR__ cropped__50pct](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/2X/b/b7a372dc145af7d5e68366f74b43dfab1ff4a6ae.png)

 ![Huanyang __Jumper_VI_VR__ cropped1](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/7/0/7064bd60ccee76ff2a5f127f6450fc51d6f9e4a6.jpeg)

A [potentiometer](https://en.wikipedia.org/wiki/Potentiometer) can be connected to any VFD, but those models who additionally have **a Potentiometer on the Front Panel** they need a Jumper or something that lets you choose which potentiometer to use: The one on the Front panel, or the other that you wire to the Analog Terminal Inputs:  
! ![Huanyang_VFD __Basic_Connection_Diagram__ With_mark_on_Analog_Input_Terminals](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/2X/d/df28468338db17e299bd52caee8202779ce412ed.png)  
Source: [Huanyang Manual](https://buildbotics.com/upload/vfd/Huanyang-VFD-,manual.pdf), page 12.

Note that if you bought a VFD without potentiometer on the Front Panel, don’t worry, you can at any time connect a potentiometer to the Analog Terminals showed above.

So of course I saved well the information about the jumper you gave me, in order to make it available.

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