I have been using the following code for a while now. It allows for an autostarting vacuum or dustcollector. The vacuum can also be controlled with a screen button (or even a hardware button).
There is a time delay when the spindle stops or the button is pressed again.
None of this is mine, I just used examples from the forum (thanks pcw) and read the manuals.
#vacuum cleaner delay
loadrt timedelay names=timeDelayVacuum
addf timeDelayVacuum servo-thread
setp timeDelayVacuum.on-delay 0
setp timeDelayVacuum.off-delay 4
net spindle-on spindle.0.on => vfd.spindle-on
net spindle-on vacuumOr2.in0
net coolant-flood vacuumOr2.in1
net vacuum vacuumOr2.out
net vacuum timeDelayVacuum.in
net delay_sig timeDelayVacuum.out [HMOT](CARD0).ssr.00.out-05
