使用photoeyes的blocked procedure和cleared procedure,例如:" m7 T# x3 l4 E: A0 n
begin Conveyor.Photoeyes1 blocked procedure ; b$ e5 x) b* Z* z. L5 M* X7 L if the load color = red then begin' k O- o, F6 g; l
travel to ........; j1 ?$ P) U0 m3 b! S8 W: J' p
end7 v4 ~2 p+ A6 g& U7 H6 C
end 8 C0 y% B, c8 D; v" o" p