Originally Posted by
dwg123
Thanks for the attempts to help, guys. However it's still unclear to me how to proceed.
@mactec54, you're saying to connect the braking resistor to the DC+ & DC- terminals, correct? I'm reluctant to try this because I read 320VDC across the terminals even when the VFD & spindle are idle. Won't this either burn out the VFD or cause a fire?
@dmoore, can you take a look at the images I posted earlier and confirm I'm wiring the braking resistor the way you recommended in your original post? Can you see anything I'm doing wrong?
Side note: I did eventually track down and contact the OEM for the VFD. They responded by saying that if it doesn't work, my VFD doesn't support it. Yet @dmoore's VFD of the exactly same model works. It was the typical unhelpful passive / aggressive response I'm starting to get used to from off-shore vendors. American companies, I have an answer by phone or email in 5-10 minutes. The far-east companies, lucky to resolve in 5 weeks. They seemed to be looking at the same manual, seeing the VFD model isn't listed, and jumping to an evasive pat answer instead of tracking down a real answer. All compounded by language issues, of course.
Trying to clarify here, in summary:
* Braking resistor is connected between DC+ & BR-. F0.19-F0.23=0 but any F0.09<30 triggers a E00A on spindle-stop.
* Do I have
A) incorrect wiring
B) a VFD parameter settings problem
C) this VFD just doesn't support braking
Thanks for your patience and apologies for dragging this thread down a confusing path. I'm really trying to get a clear understanding before taking next steps. I don't want to give up, but not mistakenly damage the VFD or worse either.