New to LCNC, right?
BTW - the "ED" vs "E" affects the 7i76's outputs, not the inputs. "E" sources the outputs, "ED" sinks the outputs. "ED" lets you control relays, PLC's or other external components with different voltage requirements. i.e. you can have a 12v relay coil, a 5v LED light, and a 24v PLC input all triggered by the same 7i76ED.
Do you know how to use halshow? If not, this is the best way to troubleshoot I/O signals.
Just to recap... Assuming you're using inductive sensors with 3 wires. Typical colors are:
Brown = V+
Blue = 0V
Black = signal
The fact that the sensor lights work is a good sign.
The next thing to check is voltages. Are these 24v or 5v (or 12, or something else)?
What are you powering them with?
What is the field voltage set to on the Mesa?
Have you reviewed the '
7i76 connection sheet' that's been posted on the forum a number of times?
forum.linuxcnc.org/27-driver-boards/3191...ection-sheet?start=0
This would be a good place to start when reviewing the connections between power supply, 7i76, and sensors.
Have a look at the diagrams attached to the post above and double-check everything. If you're still having trouble come back and we'll get you sorted out.
