G540 & VFD

[PEU]

PEU,

<i>"It would be great if the G540 could supply the reference voltage derived from the motors supply."</i>

When the G540 was designed, the VFD section was meant to replace the remote speed control potentiometer. My understanding was most VFD drives have that option. A 5K potentiometer is specified and it has 10VDC across it.

Thanks for the reply Mariss, after posting this I checked the suggested improvements for the G540 in the thread about that and saw that a 12v 50ma line is being considered as an addition to the current design, that would do too.

I would suggest adding a few more lines to the user manual, will post about that in the g540 suggestions thread.

Mariss, apparently this VFD does not supply +10v for the Pot.
It can be set for 24vdc pot supply or just analogue input and com.
See configuration post #1.
Al.

Yes, this VFD does not provide +10, its a 0.75KW single phase input unit not much bigger than a can of soda, amazing what they can do in such a small space.
Got it working yesterday under mach3 control via the G540, need to add relay for FOR/REV control and tidy up the control panel.

Thanks guys

[drboom]

PEU,
Communication will be RS-485 and no, it won't work with Mach3.

why not?

[Al_The_Man]

A plug in has been written for huanyang for USB to RS-485, which is non-ModBus compatible.
I am hoping to get an idea what is needed for plugin programming, I have the tools, I just need to get up to speed with them.
Al.