Can I, with pickmaster, get at signal every time a box, that is not used, passes the robot?

svoldgaard

I have a system, where 3 robots puts items in boxes on a conveyor.
once in a while, a box passes bye without being used by the robots, so the box is empty. 
Is there a way to get a signal, when this happens? 

Knud E Lindberg

If it is PM3 take a look at rapid instruktion flowcount

svoldgaard

I'm actually found that after I wrote my question.
But I found out, that I need to do that in a background task.
So now I need to share the source variable to get it to work. How can I do that?