User Interface ("UI") events only exist on devices that support Front Panels as User Interface. The myRIO is meant to run stand-alone and has no monitor connector, it is "headless". Therefore it does not support Front Panels in full. Generally, UI events do not fully work on Real-Time targets like the myRIO. The Val(Sgnl) Property Node will not
fire an event. Use Queues
or User Events
to pass your data between loops instead.
When executing interactively from your host PC, you will still see a Front Panel, however this Front Panel is executed on the host PC while the Block Diagram itself is executed on the Real-Time system.