Two possibilities would be: - use a global variable, which you initialise with the desired value before the rest of your program executes
- create a VI that simply returns the value from a block diagram constant. I'd favour the second route, as it gives more flexibility for future expansion: if you need to later on, you can upgrade that VI to read the value from disc or to calculate it on a case-by-case basis, or whatever, without breaking your existing code. If you have lots of constants you need to define, put them in a cluster and use Unbundle by Name to pick the one you want from the cluster value returned by your global or constant VI.
