door signal implementation

Hello everyone,I have a proximity sensor that detects whether the machine door is open or closed. I’d like to integrate this signal into my system so that:

1. If the door is open, the program automatically pauses.
2. If the door is closed, the program continues.
3. The program should not start if the door is open — it should only start once the door is fully closed.

What’s the best way to implement this behavior in my setup?