Presentation to understand the basics of LabVIEW

1.  INTRODUCTION
 LabVIEW ENVIRONMENT
 LabVIEW PROGRAMMING CONCEPT
 SOFTWARE CONSTRUCTS IN
LabVIEW

2. INTRODUCTION
• LabVIEW is the acronym for Laboratory
Virtual Instrument Engineering Workbench
• It is a Graphical-based programming language
• VI (virtual instrument) is the basic LabVIEW
element
• Programming languages such as C, C++,BASIC
use functions and subroutines LabVIEW uses
VI

3. BENEFITS
Extensive Interface - Even people with limited
coding experience can write programs and
deploy solutions in reduced time interval.It
also includes An interface to .NET framework
assembly
 Code Reuse and Platform independent -The
G-code is independent of the operating system
Parallel Processing- Easy to code programs
with multiple tasksperformed in parallel by
multithreading

4. APPLICATIONS OF LabVIEW
Machine monitoring and control :LabVIEW
Real-Time module helps in preparing powerful
machine monitoring and control applications
 Research and Analysis : Scientist and
Researchers use it biomedical ,aerospace
energy industries etc .
 Control Design : Real world data can be
compared with theoretical data .

5. Analogy between LabVIEW and C
• VI FUNCTION
• DRAG-DROP UNITS COMMANDS
• BLOCK DIAGRAM COMMAND WINDOW
• FRONT PANEL USER INTERFACE
• FILE EXTENSION .VI .C
• MATH-SCRIPT math.stdio
and lot more …..

6. FRONT
PANEL•
BLOCK
DIAGRAM
CONNECTOR
PANE

7. LabVIEW Environment
A VI has three main parts
A. Front Panel
B. Block Diagram
C. Connector Pane
 Front Panel: Interacts with the user
 Block Diagram: Contains the code
 Connector Pane: Method of connecting to other
VI’s

8. Front Panel
• Right click controls palette pop's up
• Connector pane (terminal connector) is a part
of front panel
• Caption and Label both are front panel
properties
• Traditional Debugging features not available
for front panel

9. FRONT PANEL
It is the user interface

10. Block Diagram
• Label is block diagram property
• Right click functions palette pop's up
• Traditional debugging features and clean up
diagram option(ctrl+u) available only for block
diagram

11. BLOCK DIAGRAM
It contains the code

12. Connector Pane
Means of Passing Data to other VI
The Connector Pane terminals display
the color of data

13. CONNECTOR -PANE
Means of passing data to other VI

14. BUILT-IN-HELP
 This is enabled by selecting this item from
the Help pull-down menu
 If the cursor is placed over the particular
button, a small box pops up with its
description
It is also activated from the Help pull-down
menu by selecting Show Help (Ctrl+H)

16. LabVIEW Programming Concept
LabVIEW follows Data-Flow programming
The process to determine the execution of
program is called Arbitrary-Interleaving
During compilation the VI compiler constructs
a wired table
LabVIEW functions are polymorphic
 LabVIEW is not an interpreted language it is
compiled behind the scenes by LabVIEW’s
execution engine

17. LabVIEW constructs a wire table for the VI
This wire table identifies elements in the block
diagram that have inputs needed for that
element to run
A LabVIEW program is executed by pressing
the arrow or the Run button located in the
palette along the top of the window

18. LabVIEW has three palettes
o Functions Palette
o Control Palette
o Tools Palette

19. CONTROL PALETTE

20. Invoke the control palette by clicking
VIEW-CONTROL PALETTE or by right clicking
on the front panel
 The controls are grouped into categories in a
tree
The sub palettes have a lock in the top left
corner to keep the window visible while you
are working with the controls

21. FUNCTION PALETTE
 Invoke the function palette by VIEW-
FUCNTION PALETTE or by right clicking on the
block diagram
 The functions are grouped into categories

22. TOOLS PALETTE

23. VARIOUS TOOLS
 Automatic tool selection
Operating value
 Positioning
Labeling
Wiring
Short-cut menu
Scrolling
Breakpoint
Probe
Get color
Coloring

24. DATA TYPES
 Numeric
String
Dynamic Data type
 Boolean
Enum
Ring
Waveform
Variant
Timestamp

25. STRUCTURES
 While-loop- Executes at least once then
execute the conditional terminal
For-loop- for(i=0,i<N,i++)
If-Else – if (condition) body1
else body2
Switch – switch (case1)
(case2)……

26. •FOR LOOP
N=count terminal
i=iteration count

27. WHILE LOOP
i=Iteration count
Stop Button =test for stop condition
(by default it is stop if true)

28. If-Else
if ‘?’ gets value 1, T is executed
if it gets value 0 ,F is executed

29. SWITCH CASE
(MULTIPLE CASE)
? – CONDITIONAL TERMINAL
UPPER BOX DISPLAY THE CASE NUMBER