使用photoeyes的blocked procedure和cleared procedure,例如:% y- N+ j2 v e2 H/ v/ J
begin Conveyor.Photoeyes1 blocked procedure K' `* V& n3 T8 {7 L! ?7 e7 d+ g
if the load color = red then begin & b, U+ B# a+ V0 Z: l travel to ........! N5 m. E. L2 K3 y! v6 l
end 2 j' L& \) r: W- Dend9 x) V& r$ b( b0 _