On 9 February 2016 at 11:23, andy pugh <bodge...@gmail.com> wrote: > This is where things get iffy. Imagine that I have the 2-terminal > dongle plugged into a laptop. What do I use for a gnd? Stuff a wire > down the side of the USB connector? trap the wire in the hinge? :-)
In the end, I fitted a different VFD which has a pre-written HAL driver. It also only has two connections for RS485, so is less confusing. I found a way to connect the dongle to the motherboard header: https://forum.linuxcnc.org/forum/18-computer/30675-on-motherboard-modbus-rs485-connection They are so cheap that I was prepared to go through a couple experimenting, but it works fine. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1916 ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785471&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
