So picked up the parts during the week and wired as per your diagram and is working perfectly Thanks!
https://www.machsupport.com/forum/Smileys/default/grin.gifJust for my understanding and curiosity is it working by the zener diode "bleeding" off any voltage it "see's" above its set value to ground (in this case 10v)
What I don't understand is how this does not create a short circuit and overload the amp capacity of the VFD 12v output?
Also can you explain what the resistor does for this setup please.
I did have a small issue where the commanded hz was not matching the output. say I commanded M3 S12000 the Gecko output (reading with a multimeter) is spot on 5.00V but the VFD is outputting 210-220hz (should be 200hz) similar at M3 S24000 Gecko output = 9.98v VFD 385hz (should be 400hz)
Im guessing this is just due to the cheap chinese VFD, I adjusted the settings in the VFD to Max expected voltage to be 9.8V and now it puts out 400hz at 24000rpm commanded but 12000rpm is still the same or slightly higher from memory... which is fine for what Im doing, no need to be exactly spot on