User manual

After you build thefront panel,you add
codeusing graphical representations of
functions to control thefront panel
objects.Theblockdiagramcontainsthis
graphical sourcecode
UniversitàdegliStudidiCatania
IntroductiontoNILabVIEW
 IntroductiontoVirtualInstruments:BlockDiagram
LabVIEW programs are called virtual instruments (VI) because their appearance and operation imitate physical instruments, such as
oscilloscopes and multimeters. Every VI uses functions that manipulate input from the user interface or other sources and display that
information or move to other file or other computers.
LabVIEW User Manual
AVI contains thefollowing three components:
• Front panel – Serves as theuser interface
• Blockdiagram – Contains thegraphical sourcecode(Glanguage)that defines thefunctionality of theVI
• Icon andconnector panel– Identifies theVIsothat you canusetheVIinanother VI.AVIwithin another VI
is called subVI.AsubVI corresponds to asubroutineintext‐based programming languages.
DIEEI