Sharing Data in Deterministic Applications (RT Module)
You can use shared variables to read and write data among VIs in a project or across a network. Shared variables are configured software items that can send data between two locations in a block diagram that cannot be connected with wires, between two VIs running on an RT target, or between two VIs across a network running on different targets. The Real-Time Module adds a real-time FIFO to the shared variable. By enabling the real-time FIFO of a shared variable, you can deterministically share live data without affecting the determinism of VIs running on an RT target.
You also can use the RT Communication Wizard to modify a time-critical VI by adding communication methods to the VI and creating new VIs to share data with a host computer.