Connecting 7i76E with VFD

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04 Feb 2019 05:29 #125633 by tjones
Hello,

It looks like the 7i76E board has a rs-422 connection and my huanyang VFD has a rs-485 connection. Is there a converter to make this work? I would like to try and avoid using a USB to rs-485 as my computer doesn't sit that close to the VFD.

-Thanks
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04 Feb 2019 07:57 #125645 by rodw
Replied by rodw on topic Connecting 7i76E with VFD
I have yet to try this but this link has the links to docs and the bit file you need. I'm not sure if your VFD has a 4 wire interface...
forum.linuxcnc.org/27-driver-boards/3328...6e-with-uart?start=0
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13 Feb 2019 14:31 #126346 by andypugh
Replied by andypugh on topic Connecting 7i76E with VFD

tjones wrote: It looks like the 7i76E board has a rs-422 connection and my huanyang VFD has a rs-485 connection. Is there a converter to make this work?


There is rather more to using the Mesa card serial connection to control the VFD than just the physical wiring. You would also need a driver as the Mesa UART does not appear as a serial defive in /dev but only exists in the LinuxCNC HAL.
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