Unit 3 Sensor and Instrumentation _Graphical programming techniques.pptx
- 2. Front Panel Controls = Inputs Indicators = Outputs Block Diagram Accompanying “program” for front panel Components “wired” together LabVIEW Programs Are Called Virtual Instruments (VIs)
- 4. VI Block Diagram NumericConstant WhileLoop Callto subVI Knob Terminal StopButton Terminal StopLoop Terminal Thermometer Terminal Temperature Graph
- 5. Controls and Functions Palettes Graphical, floating palettes Used to place controls & indicators on the front panel, or to build the block diagram Controls Palette (Panel Window) Functions Palette (Diagram Window)
- 6. Tools Palette Operating Tool Positioning/Resizing Tool Labeling Tool Wiring Tool Shortcut Menu Tool Scrolling Tool Breakpoint Tool Probe Tool Color Copy Tool Coloring Tool • Floating Palette • Used to operate and modify front panel and block diagram objects. Automatic Selection Tool
- 7. Run Button Continuous Run Button Abort Execution Pause/Continue Button Text Settings Align Objects Distribute Objects Reorder Additional Buttons on the Diagram Toolbar Execution Highlighting Button Step Into Button Step Over Button Step Out Button Status Toolbar
- 8. Signal Generation and Processing.vi Help » Find Examples… BrowseAccording to: Task » Analyzing and Processing Signals » Signal Processing » Signal Generation and Processing.vi Open and Run a Virtual Instrument
- 9. Control T erminals Block Diagram Window Front Panel Window Indicator T erminals Creating a VI
- 10. Creating a VI – Block Diagram • After Creating Front Panel Controls and Indicators, Switch to Block Diagram <Ctrl-E> • Move Front Panel Objects to Desired Locations Using the Position/Size/Select Tool • Place Functions On Diagram • WireAppropriate Terminals Together to Complete the Diagram
- 11. WiringTips– Block Diagram Wiring“Hot Spot” ClickToSelectWires ClickWhileWiringToTack WiresDown SpacebarFlips WireOrientation
- 12. SubVirtual Instruments Whatis a subVI? • Making an icon and connectorfor a subVI • Using aVI as a subVI
- 13. SubVIs • ASubVI is a VI that can be used within another VI • Advantages – Modular – Easier to debug – Don’t have to recreate code – Require less memory
- 14. Iconand Connector • An icon represents a VI in otherblock diagrams • Aconnector shows available terminals fordata transfer
- 15. SubVIs SubVIs
- 16. Steps to Create a SubVI • Create the Icon • Create the Connector • Assign Terminals • Save the VI • Insert the VI into a Top Level VI
- 17. Create the Icon • Right-click on the icon in the diagram or front panel
- 18. Create the Connector Right click on the icon pane (front panel only)
- 19. Assign Terminals
- 20. Save The VI • Choose an Easy to Remember Location • Organize by Functionality – Save Similar VIs into one directory (e.g. Math Utilities) • Organize byApplication – Save all VIs Used for a Specific Application into one directory or library file (e.g. Lab 1 – Frequency Response) • Library Files (.llbs) combine many VI’s into a single file, ideal for transferring entire applications across computers
- 21. Insert the SubVI into a Top Level VI Accessing user-made subVIs Functions >> Select a VI Or Drag icon onto target diagram