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Q.Is LabVIEW a compiled programming language?  Yes.  LabVIEW has a sophisticated compiler that is always running as you develop your application.  When the comp…

INTRODUCTION STRUCTURES are graphical representations of the loops and case statements of text-based programming languages. There are cases when a decision mus…

You can display Nyquist planes, Nichols planes, S planes and Z planes on the XY graph. DISPLAYING A NYQUIST PLANE Complete the following steps to display a Ny…

Dynamically Formatting Waveform Graphs Wire a dynamic data type output to a Waveform Graph to automatically format the Plot legend and x-scale time stamp for t…

Customizing 3d Graphs The 3D graphs have many options that you can use to customize them, including 3D plot styles, scale formatting, grids and plot projection…

Customizing Graphs Each graph includes options that you can use to customize the graph to match your data display requirements. For example, you can modify the…

Customizing Graphs And Charts Each graph and chart includes many options that you can use to customize appearance, convey more information, or highlight data. …

3D Graphs For many real-world data sets such as the temperature distribution on a surface, joint time-frequency analysis and the motion of an airplane, you nee…

Digital Waveform Graphs Use the digital waveform graph to display digital data, especially when you work with timing diagrams or logic analyzers. The digital w…

INTRODUCTION Use the INTENSITY graph and chart to display 3D data on a 2D plot by placing blocks of color on a Cartesian plane. For example, you can use an int…

Waveform Data Type The WAVEFORM data type carries the data, start time and delta t of a waveform. You can create a waveform using the Build Waveform function. …

INTRODUCTION The WAVEFORM chart is a special type of numeric indicator that displays one or more plots of data typically acquired at a constant rate. Waveform …

Introduction LABVIEW includes the WAVEFORM GRAPH and chart to display data typically acquired at a constant rate. The waveform graph displays one or more plots…

Plotting Data Graphical display of data is an important aspect of programming in LABVIEW. A good knowledge of ARRAYS and CLUSTERS is important for graphical op…

ERROR HANDLING By default LABVIEW automatically handles any error that occurs when a VI runs by suspending execution, highlighting the subVI or function where …

LABVIEW has many more functions for ARRAYS than CLUSTERS and it is often required to change array to clusters and clusters to arrays. A cluster can be converted…

ASSEMBLING CLUSTERS The Bundle function assembles a cluster from individual elements as shown in below Figure (a). You also can use this function to change the…

Order Of Cluster Elements Cluster elements have a logical order unrelated to their position in the shell. The first object you place in the CLUSTER is element …

Cluster Controls And Indicators A cluster can be created by placing a cluster shell on the FRONT PANEL and then placing one of the front panel objects inside t…

INTRODUCTION CLUSTERS group data elements of mixed types. An example of a cluster is the LABVIEW error cluster, which combines a Boolean value, a numeric value…

POLYMORPHISM All LABVIEW arithmetic functions are polymorphic. This means that the inputs to these functions can be different DATA STRUCTURES such as scalar va…

Matrix Operations We use the matrix data type to make modeling of math problems easier. Matrices group rows or columns of real or complex scalar data for some …

Two-Dimensional Array Using Loops:  A TWO-DIMENSIONAL ARRAY can be generated easily using two nested For Loops, i.e. by placing one For Loop inside the other a…

ARRAY FUNCTIONS Array functions are used to create and manipulate arrays. You can perform common ARRAY operations such as extracting individual data elements f…

DELETE COMMAND: You can delete an element within a one-dimensional ARRAY and a row or column within a TWO-DIMENSIONAL ARRAY. To delete an element in a one-dime…

INITIALIZING ARRAYS You can initialize an array, or leave it uninitialized. When an ARRAY is initialized, you can define the number of elements in each dimensi…

One - Dimensional Array Create an Array control or indicator on the Front Panel by placing an array shell on the front panel as shown in below Figure (a), and …

INTRODUCTION A group of homogeneous elements of a specific data type is known as an ARRAY, one of the simplest data structures. Arrays hold a sequence of data …

1. Create a VI to find the factorial of the given number using For Loop and Shift Registers. Solution: The front panel has the number and its factorial, while t…

LOCAL VARIABLES in LabVIEW Local variables transfer data within a single VI and allow data to be passed between parallel loops as shown in Figure 4.22. They al…

CONTROL TIMING When a loop finishes executing an iteration, it immediately begins executing the next iteration unless it reaches a stop condition. Most applica…

When programming with loops, you often need to access data from previous iterations of the loop. For example, you may have a VI that reads the temperature and d…

Structure Tunnels Data can be passed out of or into a loop through a tunnel. Tunnels feed data into and out of structures. The tunnel appears as a solid block …

Loops and case statements of text-based programming languages are represented as structures in graphical programming. Repetition and loop are used to perform an…

1.Create a VI to compute full adder logic using half adder logic as subVI. Solution:  The front panel and the block diagrams for the half adder is shown in Figu…

Creating a stand-alone application and an installer simplifies deploying an application on multiple machines. In order to deploy the application, you first prep…

Opening And Editing Subvis When you double-click a subVI, a front panel and a block diagram appear, rather than a dialog box in which you can configure options…

You can convert a section of a VI into a subVI by using the positioning tool to select the section of the block diagram you want to reuse as shown in Figure 3.1…

You can display a subVI as icons or as an expandable node. Expandable nodes appear as icons surrounded by a colored field. Expanded nodes of SubVIs appear with …

BUILDING A CONNECTOR PANE The connector pane is a set of terminals that correspond to the controls and indicators of that VI, similar to the parameter list of …

Creating A Icon The default icon of a VI contains a number that indicates how many new VIs you have opened since launching LabVIEW. You can create custom icons…

Build A Vi Front Panel And Block Diagram The first step is to create the front panel and block diagram of a VI as shown in Figure 3.4. Consider a VI slope (m).…

INTRODUCTION Modular programming refers to the idea that programs are easier to read, to write, to debug, and to maintain if they are divided into smaller subp…

Miscellaneous Solved Problems 1.Check controls and indicators: Numeric Control and Indicator Boolean Control and Indicator String Control and Indicator Di…

LABVIEW DOCUMENTATION RESOURSES The programmer can use the Context Help window, the LabVIEW Help and the NI Example Finder to help build and edit VIs. The Cont…

DATA TYPES Data types indicate what objects, inputs and outputs you can wire together. For example, if a switch has a green border, you can wire a switch to an…

Terminals Front panel objects appear as terminals on the block diagram. Figure 2.12 shows the front panel where two numeric values A and B need to be added and…

FRONT PANEL CONTROLS AND INDICATORS You can build the front panel with controls and indicators, which are the interactive input and output terminals of the VI,…

PROPERTY DIALOG BOXES Front panel objects also have property dialog boxes that you can use to change the look or behavior of front panel objects. Right-click t…

SHORTCUT MENUS All LabVIEW objects have associated shortcut menus. To access the shortcut menu right-click the object and change the look or behavior of front …

Block Diagram—Functions Palette Use the Functions palette to create the block diagram. The Functions palette as shown in Figure 2.6 contains the sub VIs, funct…

Front Panel—Controls Palette The Controls palette shown in Figure is available only on the front panel. The Controls palette contains the controls and indicato…

Tools Palette The Tools palette shown in Figure 2.4 is available on both the front panel and the block diagram. You can create, modify, and debug VIs using the…

BLOCK DIAGRAM TOOLBAR Table 2.2 provides the details of the block diagram toolbar buttons. Click the following buttons on the block diagram toolbar to debug th…

FRONT PANEL TOOLBAR Table 2.1 provides the list of front panel toolbars buttons. Click the following toolbar buttons and pull-down menu to run and edit a VI. …

CREATING AND SAVING A VI When you launch LabVIEW, the Getting Started window appears as shown in Figure 2.3. You can begin in LabVIEW by starting from a blank …

SOFTWARE ENVIRONMENT There are three steps to create our application in the software environment: Design a user interface Draw our graphical code Run our …

Introduction to LabVIEW LabVIEW (Laboratory Virtual Instrument Engineering Workbench) is a graphical programming environment which has become prevalent through…

GRAPHICAL SYSTEM DESIGN USING LABVIEW The development of VI is linked to the evolution of small inexpensive personal computers and progress in computer hardwar…

VIRTUAL INSTRUMENTATION FOR TEST, CONTROL AND DESIGN   Virtual instrumentation has been widely adopted in test and measurement areas. It has gradually increase…

VIRTUAL INSTRUMENTATION Virtual instrumentation combines mainstream commercial technologies, such as the PC, with flexible software and a wide variety of measu…

GRAPHICAL SYSTEM DESIGN Introduction The term “scientific computing,” or “computational science”, has been used for many years to define the use of computers …

LABVIEW TUTORIAL This tutorial gives you an overview and talks about the fundamentals of LabVIEW. FEATURES OF LABVIEW 1. Design – Signal and Image Processing…