使用photoeyes的blocked procedure和cleared procedure,例如:5 B! T$ q2 C G
begin Conveyor.Photoeyes1 blocked procedure & R( H% a! F/ J+ j* X. `' t if the load color = red then begin6 }' r$ w! N. H& U# t7 ]
travel to ........ * k7 U C2 k2 @ end 4 E& S- S& f+ ^( yend - j0 {3 u* C j* _; P$ [' \