Worked exercises

Ive been googling worked out exercises examples to start off but cant find any online. Is there a site with PDF's/ examples done out for learning from. Ive just started plc's and ive seen a conveyor at work with a bottle reject station if a bottle is found with no cap installed. and im trying to get it set up but cant. It has 2 sensors looking at the bottle. cap sensor A detect bottle and sensor B looking down into the bottle if no cap presented . And sensor for reject, and a confirmation sensor that’s it’s rejected. If reject failed stops the line and 3 in a row it stops the line.
Need it on a fairly simple layout so I can start to learn from it, thought it might be easy but can't get my head around it.If i could apply something that ive seen it willhelp to understand it all easier. 

bazmc35

Ive been googling worked out exercises examples to start off but cant find any online. Is there a site with PDF's/ examples done out for learning from. Ive just started plc's and ive seen a conveyor at work with a bottle reject station if a bottle is found with no cap installed. and im trying to get it set up but cant. It has 2 sensors looking at the bottle. cap sensor A detect bottle and sensor B looking down into the bottle if no cap presented . And sensor for reject, and a confirmation sensor that’s it’s rejected. If reject failed stops the line and 3 in a row it stops the line.
Need it on a fairly simple layout so I can start to learn from it, thought it might be easy but can't get my head around it.If i could apply something that ive seen it willhelp to understand it all easier. 

 Dear bazmc35,

in the end of attached manual has some exemples for practice.

I have project to reject the down bottles after IS machine same idea  .Are you finish your project ? what you reach in this  project?