使用photoeyes的blocked procedure和cleared procedure,例如: m: l) p8 h9 u, R: x& f2 m
begin Conveyor.Photoeyes1 blocked procedure% k$ @1 X6 O( t3 b
if the load color = red then begin" M: i- }$ @. B/ t$ o7 T9 m1 m2 q
travel to ........ ) [7 T# T# M: o! _8 o8 t end * D. K" U% \. K" D3 `end C: B. k$ i& y. C