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Chris,

With ChatGPT's help I think I have found enough examples to have a go at this. I'll report back with how it goes. Thanks for your guidance.

John

Hello, 
i have a delta VFD-H, i have checked the manual there is no mention of modbus, only Serial Communications rs485 is mentioned, can i still use it with linuxcnc over rs485 ?
 

Thanks for that. I had a little formatting issue with my post that I corrected.

However, since I don't have enough inputs with the parallel port type setup to put the fault line from each driver to its own input, all three will be going to a single input. This will be corrected once I get a Mesa 7C81 if they ever go back into stock.

So, for my current setup I could do this:

net driver-fault <= hal_gpio.GPIO25-in
net driver-fault =>joint.0.amp-fault-in

Which would trigger a x-axis driver fault no matter which driver actually had a fault and stop all motion. Is this correct?

Incidentally, for my own education is this line the same as the above two lines except just on a single line?

net driver-fault => joint.0.amp-fault-in <= hal_gpio.GPIO25-in

Thanks.

Looks like that should be relatively easy to get working
with a parallel port and LinuxCNC + StepConf since
it was designed for a standard parallel port interface.

What issues did you have?

Hakan, This appears exactly as the issue I am having. I can say that I also have linuxcnc-ethercat installed from the repo. Also I would have just posted here if I knew his error was the same, sorry for clogging things up.

Steve Cap

Thank you for all the help so far. I've been running into an issue and feared it may have been caused by my fumbling earlier on and some weird state I may have put the installation into. To resolve this, I started a fresh install from current ISO and so far it has been much smoother given that I have a little more understanding. However, I have still ended up getting stuck at the same place, lol. I have included a screenshot and some config files to assist troubleshooting. 

Thanks, 

Steve Cap