使用photoeyes的blocked procedure和cleared procedure,例如:; d8 Q5 m* C7 Z: N0 E
begin Conveyor.Photoeyes1 blocked procedure 8 W' b8 t6 q, g, I5 Y- t if the load color = red then begin + e& m# f$ \! D7 Z& e travel to ........ 8 K: A. k9 I2 ? end 3 g( Z6 p. i1 s2 uend " q: Q9 v; [+ z