使用photoeyes的blocked procedure和cleared procedure,例如:& G! s J5 o' s% V8 ?9 O
begin Conveyor.Photoeyes1 blocked procedure+ U5 y6 X& a. L2 f
if the load color = red then begin# z- T- M7 z9 T9 q" M. A
travel to ........ 9 M( ~0 B# q- I( u; r2 q end 9 d) e% l- L& g* j- g; _0 i$ eend 0 R4 X+ H7 A9 m1 a7 w