[Alan Anderson]

The Robot Global Data.vi is where you create global variables (if you need them). It's only a front panel, with no block diagram. Place (or paste) a control of the appropriate type on the front panel, then right-click it and make its label visible if it isn't already. Change the label to whatever name you want the global variable to be.

To use a global variable, you can either copy one from elsewhere, or use the "Select a VI" item in the function palette to pick the Robot Global Data. You'll end up with something on your block diagram with a popup menu that lets you choose among all the globals. You can use the right-click menu to make it a "read" or a "write".