Hi there,
You can try so, but definitely you should eliminate the inner while loop and put the inner while loop condition stop in the main while loop, or use a for lop. With this you would get only 20 data from the event. Also you should use a shift register. In a previous answer a put a link where explain what a shif register do. Also would be great that you execute your code in highlight execution, to see the behavior and the logic of your program. Furthemore you can get information about the VIs with ctrl+H and drag the mouse over the VI that you have doubts.
Here is a link with some information about the debugging techniques
Regards
