I'm sure I am missing something dumb but I have an Axbb-e setup with a foam hot wire machine and it has mechanical switches wired NO in series for limits.
I have them hooked up to negative side of port 2 isolated inputs, port 11 and port 12, and they are seemingly working correctly. Green light is on except when triggered, both on the controller and in the software.
However, I cannot set pin 11 or 12, port 2 as the limit pins in the axis set up. It won't save, and I am not sure why. The obvious reason online was using output pins and not input pins but these are clearly input pins so asking first!
Thanks, Greg