ok so i got a e3d cyclops for my delta with a smoothieboard 5x

i knew about the ! but the guide does not say anything about the ^. what happens if i delete it?

All options
! invert pin
o set pin to open drain
^ set pin to pull up
v set pin to pull down

  • to set no pullup
    @ to set repeater mode

Check out http://smoothieware.org/configuring-smoothie

so ive tried all of the modifiers and here is what happens.
! nothing
o nothing
^ trigger before move
v nothing

  • nothing
    @ trigger before move
    v! nothing
    @! nothing
    o! trigger before move

is there something else at play here?