Hi Andre,
The best way to learn about queues is to open up the shipping example and go through the example "Queue basics". Notice how the system enqueues data in one loop and dequeues it in another. I would also suggest that you open up the "FIFO Communication between Loops" project. This could give you more insight how the fifo's should possibly be working in your system. These examples will hopefully give you alot more insight on how to work in fifos for your sytem.
Regards,
