5i25/6i25 Setup with Gecko g540

The thing that I find interesting is that this code works:-

# --- ESTOP-EXT ---
net estop-ext <= hm2_5i25.0.gpio.003.in_not
# ---estop signals---
net estop-loop iocontrol.0.user-enable-out => iocontrol.0.emc-enable-in

BUT the EMC won't go into reset state when the estop is latched

I can't help further as I have no experience with a G540.

This is connected to an external estop button, not the 540 isn't it?

From The gecko set-up guide:-

The first thing you should do is to connect your ENABLE pin (Pin 10) to GND (Pin 12). The section of the diagram concerning that is shown below, with the ENABLE hooked up to an emergency stop switch. If this is not done, then the G540 will not come out of FAULT mode.

Essentially the estop once unlatched (www.homanndesigns.com/index.php?main_pag...21rqouneutv9844i9gk4) ENABLEs the g540. Once the estop is pressed in a ZOMG panic the g540 is put into fault mode/disabled which cuts drive and power to the steppers.

If it helps the estop switch should be thought of as an on/off switch, as that is essentially what it does when connected to the g540. When "On" it enables the g540 and when "Off" it disables the g540 which then outputs a fault on pin15 of the db25 which in turn is gpio.003 on the 5i25.