使用photoeyes的blocked procedure和cleared procedure,例如:! D- G( |" P$ I' F+ c! \
begin Conveyor.Photoeyes1 blocked procedure4 J9 ]; u* n$ l+ a, ^2 e- H
if the load color = red then begin4 M: ~$ u( o8 v9 {
travel to ........* T/ F; d7 E. S& w
end! w7 j" T5 B, @1 b# s
end3 n; g$ r* r, U; k [$ @