LabVIEW Basics - 11 | Passing Data Through Loops

Tunnels

Passing a data wire into or out of a loop creates a tunnel.

• Input

• Each loop iteration the same value is provided at an input tunnel.

• Output

• A loop must execute to completion before passing any data out through a tunnel.

• Upon completion the last value at the output tunnel is passed out.

Shift Registers

• Shift Registers can be used to pass data from one loop iteration to the next.

• To create a shift register right click the edge of the loop and choose Add Shift Register

• To change a tunnel to a shift register right click the tunnel and choose Replace with shift register.

• When passing Arrays into a loop Auto Indexing can be used to iterate over the array.

• To auto index an array right click on the tunnel and choose Enable Indexing.

• Each loop iteration the next value in the array is passed into the loop.

• Auto Indexing can also be used on loop outputs to automatically create arrays of data.