使用photoeyes的blocked procedure和cleared procedure,例如:4 y$ Z; K9 ~% N d9 P
begin Conveyor.Photoeyes1 blocked procedure- l0 i" z) p1 o, Z+ `2 Q
if the load color = red then begin$ P& k0 T& ?4 B9 ]0 Y" D' Q
travel to ........2 a! h" |7 S- C7 I. Z) ~, O
end9 M/ r4 l" e1 e9 G, N
end 1 y' s z+ v3 v& k