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Developer(s)	National Instruments
Initial release	; 34&#;years ago&#;()
Stable release	LabVIEW NXG LabVIEW / May&#;; 4&#;months ago&#;()
Written in	C, C++, .NET
Operating system	Cross-platform: Windows, macOS, Linux
Type	Data acquisition, instrument control, test automation, analysis and signal processing, industrial control, embedded system design
License	Proprietary
Website	manicapital.com

Laboratory Virtual Instrument Engineering Workbench (LabVIEW)^[1]:3 is a system-design platform and development environment for a visual programming language from National Instruments.

The graphical language is named "G"; not to be confused with G-code. Originally released for the Apple Macintosh in , LabVIEW is commonly used for data acquisition, instrument control, and industrial automation on a variety of operating systems (OSs), including Microsoft Windows, various versions of Unix, Linux, and macOS.

The latest versions of LabVIEW are LabVIEW and LabVIEW NXG , released in May ^[2] NI released the free for non-commercial use LabVIEW and LabVIEW NXG Community editions on April 28th, ^[3]

Dataflow programming[edit]

The programming paradigm used in LabVIEW, sometimes called G, is based on data availability. If there is enough data available to a subVI or function, that subVI or function will execute. Execution flow is determined by the structure of a graphical block diagram (the LabVIEW-source code) on which the programmer connects different function-nodes by drawing wires. These wires propagate variables and any node can execute as soon as all its input data become available. Since this might be the case for multiple nodes simultaneously, LabVIEW can execute inherently in parallel.^[4]:1–2Multi-processing and multi-threading hardware is exploited automatically by the built-in scheduler, which multiplexes multiple OS threads over the nodes ready for execution.

Graphical programming[edit]

LabVIEW integrates the creation of user interfaces (termed front panels) into the development cycle. LabVIEW programs-subroutines are termed virtual instruments (VIs). Each VI has three components: a block diagram, a front panel, and a connector pane. The last is used to represent the VI in the block diagrams of other, calling VIs. The front panel is built using controls and indicators. Controls are inputs: they allow a user to supply information to the VI. Indicators are outputs: they indicate, or display, the results based on the inputs given to the VI. The back panel, which is a block diagram, contains the graphical source code. All of the objects placed on the front panel will appear on the back panel as terminals. The back panel also contains structures and functions which perform operations on controls and supply data to indicators. The structures and functions are found on the Functions palette and can be placed on the back panel. Collectively controls, indicators, structures, and functions are referred to as nodes. Nodes are connected to one another using wires, e.g., two controls and an indicator can be wired to the addition function so that the indicator displays the sum of the two controls. Thus a virtual instrument can be run as either a program, with the front panel serving as a user interface, or, when dropped as a node onto the block diagram, the front panel defines the inputs and outputs for the node through the connector pane. This implies each VI can be easily tested before being embedded as a subroutine into a larger program.

The graphical approach also allows nonprogrammers to build programs by dragging and dropping virtual representations of lab equipment with which they are already familiar. The LabVIEW programming environment, with the included examples and documentation, makes it simple to create small applications. This is a benefit on one side, but there is also a certain danger of underestimating the expertise needed for high-quality G programming. For complex algorithms or large-scale code, it is important that a programmer possess an extensive knowledge of the special LabVIEW syntax and the topology of its memory management. The most advanced LabVIEW development systems offer the ability to build stand-alone applications. Furthermore, it is possible to create distributed applications, which communicate by a client–server model, and are thus easier to implement due to the inherently parallel nature of G.

Widely-accepted design patterns[edit]

Applications in LabVIEW are usually designed using well-known architectures, known as design patterns. The most common design patterns for graphical LabVIEW applications are listed in the table below.

Benefits[edit]

Interfacing to devices[edit]

LabVIEW includes extensive support for interfacing to devices such as instruments, cameras, and other devices. Users interface to hardware by either writing direct bus commands (USB, GPIB, Serial) or using high-level, device-specific drivers that provide native LabVIEW function nodes for controlling the device.

LabVIEW includes built-in support for NI hardware platforms such as CompactDAQ and CompactRIO, with a large number of device-specific blocks for such hardware, the Measurement and Automation eXplorer (MAX) and Virtual Instrument Software Architecture (VISA) toolsets.

National Instruments makes thousands of device drivers available for download on the NI Instrument Driver Network (IDNet).^[8]

Code compiling[edit]

LabVIEW includes a compiler that produces native code for the CPU platform. The graphical code is converted into Dataflow Intermediate Representation, and then translated into chunks of executable machine code by a compiler based on LLVM. Run-time engine calls these chunks, allowing better performance. The LabVIEW syntax is strictly enforced during the editing process and compiled into the executable machine code when requested to run or upon saving. In the latter case, the executable and the source code are merged into a single binary file. The execution is controlled by LabVIEW run-time engine, which contains some pre-compiled code to perform common tasks that are defined by the G language. The run-time engine governs execution flow, and provides a consistent interface to various operating systems, graphic systems and hardware components. The use of run-time environment makes the source code files portable across supported platforms. LabVIEW programs are slower than equivalent compiled C code, though like in other languages, program optimization often allows to mitigate issues with execution speed.^[9]

Large libraries[edit]

Many libraries with a large number of functions for data acquisition, signal generation, mathematics, statistics, signal conditioning, analysis, etc., along with numerous for functions such as integration, filters, and other specialized abilities usually associated with data capture from hardware sensors is enormous. In addition, LabVIEW includes a text-based programming component named MathScript with added functions for signal processing, analysis, and mathematics. MathScript can be integrated with graphical programming using script nodes and uses a syntax that is compatible generally with MATLAB.^[10]

Parallel programming[edit]

LabVIEW is an inherently concurrent language, so it is very easy to program multiple tasks that are performed in parallel via multithreading. For example, this is done easily by drawing two or more parallel while loops and connecting them to two separate nodes. This is a great benefit for test system automation, where it is common practice to run processes like test sequencing, data recording, and hardware interfacing in parallel.

Ecosystem[edit]

Due to the longevity and popularity of the LabVIEW language, and the ability for users to extend its functions, a large ecosystem of third party add-ons has developed via contributions from the community. This ecosystem is available on the LabVIEW Tools Network, which is a marketplace for both free and paid LabVIEW add-ons.

User community[edit]

There is a low-cost LabVIEW Student Edition aimed at educational institutions for learning purposes. There is also an active community of LabVIEW users who communicate through several electronic mailing lists (email groups) and Internet forums.

Home Bundle Edition[edit]

National Instruments provides a low cost LabVIEW Home Bundle Edition.^[11]

Community Edition Edition[edit]

National Instruments provides a free-for-non-commercial use version called LabVIEW Community Edition.^[12] This version includes everything in the Professional Editions of LabVIEW, has no watermarks, and includes the LabVIEW NXG Web Module for non-commercial use. These editions may also be used by K schools.^[13]

Criticism[edit]

LabVIEW is a proprietary product of National Instruments. Unlike common programming languages such as C or Fortran, LabVIEW is not managed or specified by a third party standards committee such as American National Standards Institute (ANSI), Institute of Electrical and Electronics Engineers (IEEE), International Organization for Standardization (ISO), etc. Some users have criticised it for its tendency to freeze or crash during simple tasks, requiring the software to be shut down and restarted.^{[citation needed]}

Slow[edit]

Very small applications still have to start the run-time environment which is a large and slow task. This tends to restrict LabVIEW to larger applications. Examples of this might be tiny programs to grab a single value from some hardware that can be used in a scripting language - the overhead of the run-time environment render this approach impractical with LabVIEW.^{[citation needed]}

Non-textual[edit]

Since G language is non-textual, software tools such as versioning, side-by-side (or diff) comparison, and version code change tracking cannot be applied in the same manner as for textual programming languages. There are some additional tools to make comparison and merging of code with source code control (versioning) tools such as subversion, CVS and Perforce. ^[14][15][16]

No zoom function[edit]

There was no ability to zoom in to (or enlarge) a VI which will be hard to see on a large, high-resolution monitor. However, the ability to zoom has been added into LabVIEW NXG.^[17]

Release history[edit]

In , starting with LabVIEW , major versions are released around the first week of August, to coincide with the annual National Instruments conference NI Week, and followed by a bug-fix release the following February.

In , National Instruments began naming releases after the year in which they are released. A bug-fix is termed a Service Pack, for example, the service pack 1 was released in February

In , National Instruments moved the annual conference to May and released LabVIEW alongside a completely redesigned LabVIEW NXG built on Windows Presentation Foundation (WPF).

Repositories and libraries[edit]

OpenG, as well as LAVA Code Repository (LAVAcr), serve as repositories for a wide range of Open Source LabVIEW applications and libraries. SourceForge has LabVIEW listed as one of the possible languages in which code can be written.

VI Package Manager has become the standard package manager for LabVIEW libraries. It is very similar in purpose to Ruby's RubyGems and Perl's CPAN, although it provides a graphical user interface similar to the Synaptic Package Manager. VI Package Manager provides access to a repository of the OpenG (and other) libraries for LabVIEW.

Tools exist to convert MathML into G code.^[27]

Related software[edit]

National Instruments also offers a product named Measurement Studio, which offers many of the test, measurement, and control abilities of LabVIEW, as a set of classes for use with MicrosoftVisual Studio. This allows developers to harness some of LabVIEW's strengths within the text-based .NET Framework. National Instruments also offers LabWindows/CVI as an alternative for ANSI C programmers.

When applications need sequencing, users often use LabVIEW with TestStand test management software, also from National Instruments.

The Ch interpreter is a C/C++ interpreter that can be embedded in LabVIEW for scripting.^[28]

DSP Robotics' FlowStone DSP also uses a form of graphical programming similar to LabVIEW, but is limited to the robotics industry respectively.

LabVIEW has a direct node with modeFRONTIER, a multidisciplinary and multi-objective optimization and design environment, written to allow coupling to almost any computer-aided engineering tool. Both can be part of the same process workflow description and can be virtually driven by the optimization technologies available in modeFRONTIER.

See also[edit]

References[edit]

Further reading[edit]

• Bress, Thomas J. (). Effective LabVIEW Programming. [S.l.]: NTS Press. ISBN&#;.
• Blume, Peter A. (). The LabVIEW Style Book. Upper Saddle River, NJ: Prentice Hall. ISBN&#;.
• Travis, Jeffrey; Kring, Jim (). LabVIEW for Everyone&#;: Graphical Programming Made Easy and Fun (3rd ed.). Upper Saddle River, NJ: Prentice Hall. ISBN&#;.
• Conway, Jon; Watts, Steve (). A Software Engineering Approach to LabVIEW. Upper Saddle River, NJ: Prentice Hall PTR. ISBN&#;.
• Olansen, Jon B.; Rosow, Eric (). Virtual Bio-Instrumentation&#;: Biomedical, Clinical, and Healthcare Applications in LabVIEW. Upper Saddle River, NJ: Prentice Hall PTR. ISBN&#;.
• Beyon, Jeffrey Y. (). LabVIEW Programming, Data Acquisition and Analysis. Upper Saddle River, NJ: Prentice Hall PTR. ISBN&#;.
• Travis, Jeffrey (). Internet Applications In LabVIEW. Upper Saddle River, NJ: Prentice Hall PTR. ISBN&#;.
• Essick, John (). Advanced LabVIEW Labs. Upper Saddle River, NJ: Prentice Hall. ISBN&#;.

Articles on specific uses[edit]

• Desnica V, Schreiner M, Vladan; Schreiner, Manfred (October ). "A LabVIEW-controlled portable x-ray fluorescence spectrometer for the analysis of art objects". X-Ray Spectrometry. 35 (5): – BibcodeXRSD. doi/xrs Archived from the original on
• Keleshis C, Ionita C, Rudin S, C.; Ionita, C.; Rudin, S. (June ). "Labview [sic] graphical user interface for micro angio-fluoroscopic high resolution detector". Medical Physics. 33 (6): doi/CS1 maint: multiple names: authors list (link)
• Fedak W., Bord D., Smith C., Gawrych D., Lindeman K., W.; Bord, D.; Smith, C.; Gawrych, D.; Lindeman, K. (May ). "Automation of the Franck-Hertz experiment and the Tel-X-Ometer x-ray machine using LABVIEW". American Journal of Physics. AAPT. 71 (5): – BibcodeAmJPhF. doi/CS1 maint: multiple names: authors list (link)

Articles on education uses[edit]

• Belletti A., Borromei R., Ingletto G., A.; Borromei, R.; Ingletto, G. (September ). "Teaching physical chemistry experiments with a computer simulation by LabVIEW". Journal of Chemical Education. ACS. 83 (9): – BibcodeJChEdB. doi/edpCS1 maint: multiple names: authors list (link)
• Moriarty P.J., Gallagher B.L., Mellor C.J., Baines R.R., P. J.; Gallagher, B. L.; Mellor, C. J.; Baines, R. R. (October ). "Graphical computing in the undergraduate laboratory: Teaching and interfacing with LabVIEW". American Journal of Physics. AAPT. 71 (10): – BibcodeAmJPhM. doi/CS1 maint: multiple names: authors list (link)
• Lauterburg, Urs (June ). "LabVIEW in Physics Education"(PDF). A White Paper About Using LabVIEW in Physics Demonstration and Laboratory Experiments and Simulations.
• Drew SM, Steven M. (December ). "Integration of National Instruments' LabVIEW software into the chemistry curriculum". Journal of Chemical Education. ACS. 73 (12): – BibcodeJChEdD. doi/edp
• Muyskens MA, Glass SV, Wietsma TW, Gray TM, Mark A.; Glass, Samuel V.; Wietsma, Thomas W.; Gray, Terry M. (December ). "Data acquisition in the chemistry laboratory using LabVIEW software". Journal of Chemical Education. ACS. 73 (12): – BibcodeJChEdM. doi/edpCS1 maint: multiple names: authors list (link)
• Ogren PJ, Jones TP, Paul J.; Jones, Thomas P. (December ). "Laboratory interfacing using the LabVIEW software package". Journal of Chemical Education. ACS. 73 (12): – BibcodeJChEdO. doi/edp
• Trevelyan, J.P. (June ). "10 Years Experience with Remote Laboratories"(PDF). International Conference on Engineering Education Research. ACS.

External links[edit]

National Instruments (NI) Labview is used to program and control hardware. There are LabView control cards in certain machines, but many other machines still have LabView installed without the hardware.

LabVIEW Run-time Engine for Browsers

National Instruments Login: chemesupport@manicapital.com Password: default as of FEB

Run-time Engine Download --> manicapital.com

Installation Instructions --> manicapital.com

Garth Black is our supporting Field Engineer from National Instruments.

manicapital.com@manicapital.com

Licenses

We have unlimited site licenses (at least for the department) which must be renewed each year. We receive new DVD's twice a year and they are stored on the software shelves above the desks in CB

When it asks to register, I used "Chemical Engineering" as the name and ChemECSR@manicapital.com as the email.

While we have traditionally installed the LabView suite of tools for most purposes, we are now starting to use the web browser-based runtime for controlling network-connected experiments. The UO Lab is the main area converting to this new setup.

manicapital.com

This runtime is installed on the lab computers by default.

LabView and earlier will run on PowerPC Macs. LabView and newer only work on Intel Macs. manicapital.com?manicapital.com=&manicapital.com=

The following procedure will remove National Instrument software and all references to National Instruments software from your Computer to start over with a fresh installation:

1. Turn off the computer and physically remove or unplug all NI hardware that you have installed on your system. This includes anything that is PCI-, ISA-, USB-, , or Ethernet-based.
2. Turn on the computer. Once booted, run the manicapital.com application attached with this document. This application will NOT harm your computer. It simply grants access to hidden installers distributed with NI products, and runs their associated uninstall procedures to safely remove their software elements from the system.
3. With manicapital.com running, ensure the Radio Button �Show NI Installer Only� is checked. You may select the First item in the listed installers, and Hold Shift clicking on the Last installer in the list. You may now proceed to Click Uninstall.
   1. Note: This will remove all NI software function from your computer. You must continue with the following steps in this procedure, to ensure persistent data is also removed.
4. After everything has been removed (do not be concerned at this point if an item still shows up in the Add/Remove Programs list after you have removed it), close all programs and restart your computer.
5. Go to START button of your operating system, choose RUN and type regedit. This will open the Registry Editor window. Go to the Registry Menu and choose Export Registry File. Select All for the export range, and select a file name. This creates a backup of the Registry in case a mistake is made when deleting the keys.
6. Remove the following registry components from the Windows Registry:
   • HKEY_CURRENT_USER\Software\National Instruments Delete the entire tree!
   • HKEY_LOCAL_MACHINE\Software\National Instruments Delete the entire tree!
   • HKEY_LOCAL_MACHINE\System\CurrentControlSet\Enum\PCI\ , \ISA, or \PCMCIA and delete registry entries containing any keys with in them.
   • Do not worry if any of these trees are not listed. Continue with the remainder of the process.
   1. Note: You may need to modify security policies. In Windows /98/95/NT, go to regedt32 then Security�Permissions. In Windows XP you can modify security options using Edit�Permissions in the Registry Editor (regedit).
7. Close regedit.
8. Make sure that you do not have any of your own VIs or other files saved in the C:\VXIpnp, C:\Program Files\National Instruments, or C:\WINDOWS\nidaq folders. If you do, copy them to a different location. If you are concerned about keeping old virtual channels and your SCXI setup intact, then backup the C:\WINDOWS\manicapital.com file, too.
   • Note: If you have Windows NT/, replace C:\Windows with C:\WINNT in the paths listed above.
9. Delete the following folders:
   • C:\VXIpnp
   • C:\Program Files\National Instruments
   • C:\WINDOWS\nidaq folders
   • Note: If you have Windows NT/, replace C:\Windows with C:\WINNT in the paths listed above.
10. Download the Windows Installer CleanUp Utility from Microsoft�s website: manicapital.com
11. Run the Windows Installer CleanUp Utility by navigating to the directory where you saved the executable and then double-clicking the executable.
12. Reboot your computer.
13. You should be ready to install your National Instruments software. For the cleanest possible install, first install all of your application development software, such as LabVIEW, Measurement Studio, etc. Do a custom install, so that you can install just the application WITHOUT ANY DRIVERS. Reboot your PC when requested after each install. Even if the installer does not tell you to reboot, it is recommended to do so anyway. Now install your driver software and follow the associated user manuals. Some older non Plug-n-Play hardware must be installed before the driver. Download the latest versions of the drivers that support your hardware from our Drivers and Updates software library. Go to manicapital.com and select �Drivers and Updates�. Install the drivers one-by-one, rebooting your computer after each install.
14. Finally, shut down your computer and re-install your hardware. When you boot up your computer again, the hardware should be detected in Measurement and Automation Explorer (MAX). If your hardware is not detected in MAX, please contact NI Support via manicapital.com and select Ask an Engineer.

After detecting your hardware, your system should be ready to go.

The error is from HP keyboards (and maybe mice). Some of the newer keyboards use an ID that is very similar to NI devices. The NI software attempts to connect, or install the device and fails. By replacing the keyboard, and removing all existing USB ID entries with a utility from NI, the problem went away.

We have a lot of older keyboards that we can use until NI completes a patch.

We are troubleshooting an issue where half of the computers can't add simulated devices.

While performing the Clean Reinstall Procedure, I got this error, "Error occurred when trying to uninstall NI LabVIEW Run-Time Engine SP1".

I just picked up the new LabView software, v, from Kent Gilbert. I decided to throw out the older versions (we had 3). The manuals and cheat-sheets should be given to the power users.

Here is the current key code: 7Z8C-CW3W-KV8H-BJZM-8BNH