Can't figure out how to write code for conveyor system.3 conveyors.Tried timers but wouldn't work because parts vary in length.I need to probably latch each conveyor on and off and reset when full????? Part is placed on conveyor A,It turns on B ,part goes to B it turns on C.Part stops conveyor C at the end by a photo- eye.Next part advances to B and is goes to the to the end of B and photo -eye stops conveyor B.Next part is placed on conveyor A and stops conveyor A by another photo-eye. Conveyor system is now full .At this time an output will halt part placement until a part is removed from conveyor C and the process begins again. Used blocked /clear with timers on each end photo eye and it now works!!!!!!!!!!! Thanks
