calderp
Aluminum
- Joined
- Jul 22, 2011
- Location
- New Orleans
We're putting a VFD on our mill and I'm a little lost in the details with one particular part of the setup, maybe someone more familiar can help. This is the VFD: https://www.tecowestinghouse.com/Manuals/L510_instruction_manual.pdf
On our remote controls I would like to have the following:
JOG FWD / JOG REV (either momentary pushbuttons or a momentary return to center paddle switch
START FWD / START REV (again there's a few ways to do this, my preference is with a return to center momentary paddle)
STOP
E-STOP
Conveniently the L510 has a pretty good logic board and can do all of this with simple inputs, no extra relays or switches. HOWEVER there are only 5 total 'multi-function terminals' despite there being something like 20 options for them. I can wire the JOG FWD/JOG REV/FWD/REV/STOP using these terminals and I can also wire the E-stop using these terminals but I'm short a terminal to do both at once. I could of course give up the separate STOP / E-STOP buttons and have a single sustained switch but for a few reasons I prefer both, mainly because I think that an E-STOP should be just that, an emergency stop. Is there another way to wire an E-STOP into these inverters which still uses the internal logic board to electrically brake the machine? I know I could wire in a relay to physically cut power but with the loss of electric braking this "emergency" stop would be slower than the normal stop button.
I know I could redesign my switching a little to free up a terminal and I may have to do that but my question first is whether there's a way that I'm not seeing to hook up a dedicated e-stop which uses the VFD's accelerated stopping but doesn't need to be run off of one of the multi-function terminals (S1-S5).
On our remote controls I would like to have the following:
JOG FWD / JOG REV (either momentary pushbuttons or a momentary return to center paddle switch
START FWD / START REV (again there's a few ways to do this, my preference is with a return to center momentary paddle)
STOP
E-STOP
Conveniently the L510 has a pretty good logic board and can do all of this with simple inputs, no extra relays or switches. HOWEVER there are only 5 total 'multi-function terminals' despite there being something like 20 options for them. I can wire the JOG FWD/JOG REV/FWD/REV/STOP using these terminals and I can also wire the E-stop using these terminals but I'm short a terminal to do both at once. I could of course give up the separate STOP / E-STOP buttons and have a single sustained switch but for a few reasons I prefer both, mainly because I think that an E-STOP should be just that, an emergency stop. Is there another way to wire an E-STOP into these inverters which still uses the internal logic board to electrically brake the machine? I know I could wire in a relay to physically cut power but with the loss of electric braking this "emergency" stop would be slower than the normal stop button.
I know I could redesign my switching a little to free up a terminal and I may have to do that but my question first is whether there's a way that I'm not seeing to hook up a dedicated e-stop which uses the VFD's accelerated stopping but doesn't need to be run off of one of the multi-function terminals (S1-S5).