Hi @xiang, attached you find a small example model.
As soon as the Palet hits DP1 a Token is created and stops the Palet. Than this token pulls one of two areas (numbers on a list). Depending on the pulled area I set a Direction Label on the Palet and resume it. The Token that represents the area is waiting until the Palet is uncovering one of the PE.
13 People are following this question.