Depends on your HAL setup, but you can include something like:
setp halui.feed-override.reset TRUE
in your halfile.
If that winds up forcing the value to stay at 100% all the time, you can set up a one-shot component that is triggered by the machine-on signal. Something like:
Code:
setp oneshot.0.width 0.5
net MACHINE-ON <= halui.machine.is-on
net MACHINE-ON => oneshot.0.in
net OVERRIDE-TRIGGER <= oneshot.0.out
net OVERRIDE-TRIGGER => halui.feed-override.reset
net OVERRIDE-TRIGGER => halui.spindle.0.override.reset
Note that if you have the little encoders with built-in pushbuttons and you want to use them to reset FRO or SRO after the machine is on, you'll want to pass the machine-on 'trigger' through an or2 component. That way both the trigger and the encoder button can reset the override value.
Code:
net OVERRIDE-TRIGGER <= oneshot.0.out
net OVERRIDE-TRIGGER => or2.0.in0
net BTN-FRO-RESET <= [i]your.encoder-button-pin.here[/i]
net BTN-FRO-RESET => or2.0.in1
net FRO-RESET <= or2.0.out
net FRO-RESET => halui.feed-override.reset
Same-same for the SRO; use another or2 component and the same machine-on trigger signal.
You can use the same trigger signal to set a bunch of other pins to a 'default' condition at startup: rapid override, optional stop on, manual mode, etc.
