Setting motion.analog-out-xx to 0 when starting the machine

Is it possible to set an motion.analog-out-xx pin to 0, wenn starting the machine?
I remap an  gcode and set in an owert-function an motion.analog-out pin to an value x.
If an error occurs an estop will be triggert. But anyway the motion.analog-out pin remains on
the value x.

The other approach if not remapping is to and2 it with another pin that comes on with the machine before using the value.
motion.motion-enabled may do it.

Thank you! That is what i searched for and it works as expected, but when switching on the machine, i got the error:

0: nicht in der Definition einer Unterfunktion: 'o<on_abort> endsub'
(or
0: not declared in a subroutine: 'o<on_abort> endsub' )

In my INI-File:
...
[RS274NGC]
REMAP=S argspec=s ngc=s
ON_ABORT_COMMAND=O <on_abort> call
...

in on_abort.ngc:

o<on_abort> sub

(DEBUG, parameter is [#1])
o100 if [#1 eq 5]
  (machine on)
o100 elseif [#1 eq 6]
  (machine off)
o100 elseif [#1 eq 7]
  M68 E0 Q0
  (estopped)
o100 elseif [#1 eq 8]
  (msg, abort pressed)
o100 else
  (DEBUG, error parameter is [#1])
o100 endif

o<on_abort> endsub
m2

What do i wrong?

@rodw:
Thank you. I remember your solution, if i couldn't solve the problem, with
the described error. The advantage of the ON_ABORT solution is, that
i could do other initialsations too.

I tested your on_abort.ngc  without error.

Ups, thats mysterious. I got the error only when using the on_abort.ngc.