SubVIs (DSP Module)
There are inherent differences between digital signal processors (DSPs) and general purpose processors, such as the processors in desktop PCs.
In the DSP Module, subVIs behave as subroutines when you build the DSP VI for a DSP target. The DSP compiler does not allocate any special storage for the front panel controls or indicators. SubVI front panel controls and indicators do not update in run time.