Pid allways positive

Hi all.

Did you know a way for prevent pid to output negative value ?

I have managed a hal config as absolue with acceleration/deceleration ramp for a mill spindle but using halscope when i try to stop spindle at some point the pid try to send negative value, off course i haven't issue for the ral use due to the impossibility for the card to output negative value.

(Problem solved adding a pin to my component for stopping pid if value are less than 0 if mode is absolue.)

Br