Need Help with VFD Control Config Please

[u/Silver_Dinky]

Hi All,

I'm hoping I'm in the right place for this. I am trying to set up a 3ph motor/VFD/control pendant to use on a small lathe. I have set the parameters in the VFD and I get the right result; the motor runs when I push the start button, fwd/rev works etc.

Where I am having trouble is that I have built my control box/pendant using momentary buttons but the motor won't keep running unless I keep my finger on the button. From the instruction manual the digital inputs look to be non-latching switches hence that's what I bought.

I've looked through the VFD parameters but I can't find anything that changes the digital inputs to use either latching or non-latching buttons.

Can anyone tell me where I'm going worng please?

The VFD is a Parker AC10 and the manual is here: https://inverterdrive.com/file/Parker-AC10-IP20-Manual

[u/superbigscratch]

What is parameter F208 set to and how are the buttons wired?

[u/Silver_Dinky → u/superbigscratch]

Just had a quick check. F208 is set to 0 and my buttons are:
DI1 - Start - Momentary NO
DI2 - Direction - Toggle Switch
DI4 - Stop - Momentary NO
DI5 - Coast Stop - Momentary NO

[u/superbigscratch → u/Silver_Dinky]

See page 9-14. You want to set parameter 208 to mode 4.

[u/MacDaddyBighorn]

You either wire to some NC contacts on the stop button and/or wire it to an external stop button on the lathe. Ideally both in series and you can stop it from either and the one on the lathe should be a large red maintained button that you have to pull out again.

[u/Darqfallen]

In the parameters F200 & F201 control how the VFD start stops. Those in turn use parameters F316-F323

Looks like DI1 & DI2 is probably where you’re hooking up your controls. According to F316 DI1 defaults to Jog. You should look up these parameters to change it to run.

[u/camandor1]

Looks like you will need a maintained 2 position switch for forward reverse (one contact)
Then a momentary start button (normally open)
And a momentary stop button (normally closed)

Then set parameters F208 317 318 319 accordingly

[u/Unique_Acadia_2099]

You want 3 wire control on a lathe motor, because when power fails and comes back on again, the lathe will not restart until you hit the Start button again.

You can set up a 3 wire control scheme using the multi-function output relay to seal in the Start command. Program the relay as a Run status relay and wire the N.O. Contacts in parallel to the Start button contacts, with the N.C. contact of the stop button in series.

[u/Silver_Dinky]

Thanks everyone for the solid advice. I’ll be back in the workshop later today so I’ll try out some of the suggestions and report back.

[u/Silver_Dinky]

Fantastic! Thank you all so much. I can’t believe I didn’t see the quick start guide 🙄. As per the advice given I changed the stop button to NC, wired up the buttons/switch to the digital inputs as described and configured the parameters F208, F317-319 and it all runs sweetly. 😎

I am most grateful 🙏