Stop button [Grafcet]

[castrogfx]

Hi people,
I need to make a grafcet and later convert to ladder.
In this work I have 3 buttons (on, stop, emergency).
I want to know how I can make a grafcet if I want to press "stop" (and emergency) at any time and the process stop.

Thanks for the support!

 

[ivo.maenen]

To keep it simple:

in every step of the grafcet pushing 'stop' or 'emergency-stop' should make the initial step active. You can do this by jumping or diverging (OR) from the active step into this initial step.



If this really needs to be done in every step, personally I just use the 'emergency-stop' to reset every step other than the initial step. The initial step will be set by pressing the 'emergency-stop'. This gives me less code to program and has the same result.