使用photoeyes的blocked procedure和cleared procedure,例如:! H* t. D) B+ F1 t- b
begin Conveyor.Photoeyes1 blocked procedure 3 ~( Q# B: m6 \; E; K if the load color = red then begin ( V6 {* s+ U7 ?3 w. U" ?4 A travel to ........ , H% a, p, H( \2 p$ a+ T& O% O end / B+ t+ F% f: e: Z! Qend: R3 J2 O+ f$ p/ l$ j5 f