Several digital test with labview cluster?

Similar Questions

• How to store the results in several digital Test

  My VI returns two double individual (not in a table), output power and frequency

  I am configuring a multiple digital test in TestStand but struggling to store readings.

  Using the following, I get an error.

  Output power of VI: Step.Result.Measurement ["Measurement 0"]. Data

  VI output frequency: Step.Result.Measurement ["Measurement 1"]. Data

  Would appreciate some advice.

  Thank you

  Got, it works

  Results were to be stored in Step.NumericArray [0], Step.NumericArray [1] and not Step.Result.Measurement ["Measurement 0"] as I've had.

  Thank you

• How to make a limit digital test with OR condition

  Is it possible to make a test step which is a comparison with a RC and NOT to condition?

  The code module returns a revision of PCB and the acceptable values are not States.map.

  For example, review of card must be 14, 15 or 17 but not 16.

  Stage of Custom Types are a type so they copied to any sequence file that contains one instance of them.  So when you deploy you will be fine without having to deploy all the ini files.

  You can actually just create the new stage in the movie only file and not worry do ini-files.

• Laser digital lock with Labview FPGA?

  Hello

  Sorry to bother if you are not interested in this issue of digital signal processing. We are looking for a possible digital solutions to our problem locked frequency cavity closed-loop laser (see attached PDF file for more details).  The goal is to flatten the PZTs transfer function (cancel the resonances and anti-resonances and their phase shift matching) in the frequency domain, in addition to the normal PID control.  Input/output necessary voltage signals are small (we have our own amplifiers high power for the PZTs), and their bandwidth must be at least of 50 kHz (100 kHz would be optimal).

  Among various OR hardware/software (DSP, FPGA, cRIO etc.), would anyone recommend a cost-effective solution for rapid prototyping?

  Thank you!

  I would like to look at the FPGA PXI cards nor 7854r.  I rate of 750 kHz, 1 MHz AO.  According to the involved treatment, you might expect between 200 and 750 kHz closed control loop.  If the treatment is very intense, it's probably something less than 200 kHz.

  That said, the key to these performance levels is not trivial and great care and attention to detail must be used in the coding of the FPGA.

  Good luck

• Export multiple property of a digital test limits as an expression

  I am able to import and export the limits of the digital with expressions and several digital tests with expressions.

  What about using the charger of property for expressions within limits for multiple digital tests?

  Step.Result.Measurement [0]. Limits.LowExpr doesn't seem to work (unless I need to get one for each of the 9 several tests in my sous-suite).

  Stephen

  HM, works now.

  I had 5 multi-stage limit (0-4). Adding entries for all 5 seems to have done the trick.

  The entries are of the form: Result.Measurement [x]. Limits. [Low |] Expr-top]

  Header row:

  Result.Measurement [0]. COMP, result. Measurement [0]. Limits.Low, Result.Measurement [1]. COMP, result. Measurement [1]. Limits.Low, Result.Measurement [2]. COMP, result. Measurement [3]. COMP, result. Measurement [3]. Limits.High, Result.Measurement [3]. Limits.Low, Result.Measurement [4]. COMP, result. Measurement [4]. Limits.High, Result.Measurement [4]. Limits.Low, Result.Measurement [2]. Limits.LowExpr, Result.Measurement [2]. Limits.HighExpr, Result.Measurement [1]. Limits.High, Result.Measurement [2]. Limits.High, Result.Measurement [2]. Limits.Low, Comp, Limits.High, Limits.Low

• Read file test.txt (binary or what?) with LabVIEW 8.6

  Dear friends!

  Please, how to read the attached file (test.txt) with LabVIEW 8.6.  In the same VI, can I convert it in a txt file real with the results presented in the rows and columns? Please, any idea? I need help!

  The rebooting of the trace file is binary.

  Unfortunately, without a description of the real file by developers RELAP format, I don't think you are going to get very far on the decoding of the file.

  You must get directly in contact with the authors RELAP.

  Here's the blurb to the RELAP Manual:

  3.1.4.2 the reboot-Plot file.

  The restart-trace file contains almost all the parameters of calculation

  (Sub fractions, pressures, temperatures, flow rates, etc.) for transient computing together.

  A common misconception is that a parameter must be specified using a minor in change request

  in order to be available in the reboot-trace file when the calculation is complete. Affects a minor change request

  only the printed output. The restart-trace file is accessible repeatedly that the new data should arise. However,.

  during a calculation, the data are written to the reboot-trace only for minor editing file (and the plot point)

  frequency. Once a calculation has been performed, it is not possible to recover data between data

  written to the file to restart-track of the points. Therefore, it is important to choose a minor edit (and plot the point)

  frequency that provides the plot to an interval appropriate to the problem is resolved. In practice,.

  the minor change (and plot point) frequency must be changed during the calculation as the product of the problem

  from one phase to the other. Common points must be selected in the phases of problem where rapid

  RELAP5-3D/2.4

  INEEL-EXT-98-00834-V5 3-18

  setting changes are expected. For the economy, less common points must be selected in the phases

  where the conditions of rest are expected.

  Calculations are usually made using several reboots. (See Volume II for the restart entry

  requirements.) For example, a new problem runs from 0 to 10 seconds. This first part is analyzed and

  Run again from time zero that errors will be corrected. When a managed to 10 seconds has been calculated, a

  restart run is made (for example, 10 to 30 seconds), and so on. RELAP5-3D

  © offers you the possibility of

  change of almost any feature of the model at any point of restart. When changes to the model are incorporated on

  reboot, reboot-plot file reflects those changes only after the decimal point in the calculation, where they have been

  implementation. In the example above, if an injection system is added to the model to 10 seconds, then data

  for added components exists only for the time after 10 seconds. Changes, deletions and additions of model

  are constantly being implemented. If a model change is done in 10 seconds, the revised model remains in

  effect unless other changes are made to subsequent restart points.

  When a calculation is completed, the restart-trace file becomes a valuable document of the

  calculation. If lost, replacement would require reperforming the calculation, usually to the considerable

  loads. At a later date, the file can be accessed and previously compressed data can be obtained as

  necessary to extend the analysis. Therefore, it is recommended that files of restart-track of the important calculations

  be protected safely and permanently.

• Slide with several digital poster Down filter event Bug button?

  A key event filter on a slide with several digital screens down does not work as expected when not waived. If you for example tab of this slide with two digital screens digital display, the cursor remains on his position, rather than get KeyFocus to the next control. Same behavior at fault if you want to move the cursor on the left/right keyboard, nothing happens. Anyone an idea why?

  A simulation of that VI is attached. All other controls, a Slide with a digital display or a standard digital control, the key Down event filter behaves as expected... I tested in versions 8.5.1 LV (attachment), LV2012SP1 and LV2013.

  A teammate now found a solution or workaround. We do not know if this is the way it should be, if yes, then it's a bit hidden, but it works!

  It seems that the cursor needs to know on what digital display the FocusObj is when you use the event notifier KeyDown. Then, when to get the reference of the digital display active and the wiring of this reference to the terminal FocusObj filter event everything works as expected, numbers of tabs, typed, cursor etc and have to filter and notify events structure to the event.

  A vi and a printscreen are attached.

  The question is probably due to the specialty of slides and the class NumericWithScale in general, as its digital displays are a little under References and during the implementation of the features of event KeyDown for the class NumericWithScale filter, LV simply does not know on which side of the main action control part must be executed.

  Or someone has a better solution and explanation?

• To a result NULL of Labview TestStand to a type of digital test limit.

  Hello:

  I am looking for a way to pass a null value as a result in a limit test multiple digital test type.  My tests are written in Labview.

  The tests now pass a value of '-' 999 to TestStand to signify that this measure has not been made, but this requires additional processing and code in our data analysis tools.  Passing a value zero would simplify the tool and reduce the workload.

  Thank you

  Mike

  You can switch NaN instead.  At least, I think you can.  TestStand supports NaN, but I never spent through Labview adapter, so I'm not 100% sure if it will work.  NaN is treated in tests limits labview as follows (hat tip to James Grey here):

  (NAN > x) == false
  (NAN == x) == false
  (NAN< x)="=">
  (NAN == NAN) == true

  I don't know how it would be dealt with when writing a good database.  I guess it depends on the data base and values of what digital special supports.  A quick search shows that NAN (not sure if he would lift an error or that) does not support Sybase, MySQL stores NAN as NULL in numeric fields, SQLite stores NAN as a special string code, Access stores in the form of NAN.

  So you should always write a step for translate NAN for NULL values, but I think it would be easier to write and maintain than an arbitrary number.

• Call a dll built with Labview in Digital Micrograph

  Hello everyone,

  I am faced with a difficult problem. I use Digital Micrograph that run the DLL of enforcement. This DLL must be built with a structure of library written in C. In this C code, I can call a built with Labview VI. If the Vi is simple, Digital Micrograph is happy. But, if I include a graph in the VI, C code builds and create a dll but Digital Micrograph falls down. Of course, DM is unclear the type Labview graph. I can do what I want in my VI and how can I solve the problem?

  Thank you.

  Gautier

  gautierdufourcq wrote:

  I solved part of the problem, DM do not plant more but the Labview graph is not displayed. Do you have a solution? THX

  Is not a problem of LabVIEW.

  It's their DLL. Talk to DM.

• details on the test of suspension of vehicle (car) with labview real-time

  Hello friends,

  I'm doing phd in the suspension system active semi auto. Here, I need to study and measure all the setting of suspension of the complete vehicle experimentally. . So far, the experimental cost is so high.that too will give the approximate result.

  In the experimental method, we need create the profile of the road using jacks. Its cost too much. I don't want to do that.

  I would like full of model.is of vehicle it is possible to time real suspension test using labview? Let me tell you what I want.

  I have to fix four sensors on four wheels to measure the road disturbance. Then I will join four more sensor on the car body.

  This difference in two reading will give the perfromace of my suspension. Whenever I drive my car, I can get this place profile and the road to the deformation of the car body. Finally, I can measure my performance of car suspension.

  is it possible to get the upward movement of the tire by using sensor in labview? That's what I want exactly. In the experimental method, we spend a lot of time and money to create the profile of the road. but it is already available in envirment. So, I just want to eliminate the road profile. If we eliminate we can easily measure the performance of the suspension.

  The measured value recorded in the vehicle itself using labview computer. So we can better the performace.

  If you do not understand my question pls ask me once again.

  looking for your answer.

  Spengler

  I saw an article that uses labview for quarter car model. but want to do it for the full car model.

  Hello

  I hope that I can understand what you mean, because I did several tests on vehicles and I hope that I can tell you something good for your topic.

  First of all, I am interested in what kind of upward movement? Speed, displacement or same acceleration? You can have a lot of possibilities for a test in the vehicle using LabVIEW, CompactRIO or CompactDAQ, but they are all software problems. If you know which parameter you will measure, we can simply fix the sensors on the suspension and run the test program.

  Also you can collect the State of the car, for instance a speed of ROTATION of the wheels and so on, through the CAN bus.

  If you are you doing PhD on this topic, you may need to find a company to present a better solution. Well, in a Word, it is a part of a doctoral thesis.

  Wilbur

• I developed an Android application for a Digital Magazine with Digital Publishing Suite (Professional). Several weeks ago, I received this message from Google game: "we wanted to let you know that your app (s) listed below statically link against a versio

  I developed an Android application for a Digital Magazine with Digital Publishing Suite (Professional).

  Several weeks ago, I received this message from Google game: "we wanted to let you know that your app (s) listed below statically link against a version of OpenSSL that has several vulnerabilities for users. Please migrate your app (s) to a new version of OpenSSL within 60 days of this notification. From 07/07/15, game Google will block the release of new applications and updates that use versions older, not supported by OpenSSL (see below for more details). »

  I've updated the Android App using function Web app Designer, but they keep sending me this message. I don't understand what I have to do.

  Hi Sheila,

  If you connect to your Google game account, it will show you who sent you the warning to the apps. The generator on the web app produces Android apps which are not affected by this vulnerability.

  Neil

• Construction of test with several results

  Hi, I have the question of Lilybyri:

  I'm learning to build test with several results from your article:

  Construction of Test with several results (CP5)

  That's exactly what I need. My question can I use the interaction of radio button or smart shape rather click on? What do you recommend? I used CP7 CP8.

  Need to publish the final test HTML5 and the output SWF. My test wil have 55 questions and 4 results score-one of them describe the personality of the learner.

  Yarik

  Advasntage to click on the button box and shape, it's that they have points

  attached to it. This is not the case for the interaction of radio buttons that has

  also limited formatting options.

• Problem of size of form with several Digital Signatures

  I created a form (liveCycle 8) with several digital signatures.  When each user signs the form, this section of the form is locked using collections.  The form is workflow by email after each user connects it.  Whenever the user signs and submits the form, the size of the form becomes too great.

  How to optimize the form to compress whenever a user signs the form?

  Thank you

  Lori

  Steve,

  After your request to publish the form, I wanted to remove some elements of society, such as the Logo.  Once I removed the Logo, I found that the biggest problem was a Logo image size which was the large file.  Once I reduced the size of the image, added only 46 KB signatures at each level of signature.

  Thank you for your help,

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• Cannot bind to the shared object created with LabVIEW 2009

  I have problems referring to a shared library built from a LabVIEW VI under RHEL 5 with LabVIEW 2009.

  To illustrate the problem, I created a VI with a digital input and output that corresponds to a certain number. Then, I created a draft specification of build to create a shared library with a feature that makes use of this VI square. The shared object is created successfully (square.so).

  When I try to compile a test application written in C, that connects to this library, I get errors in the following link:

  cc  -I/usr/local/natinst/nidaqmxbase/include -I/usr/local/natinst/LabVIEW-2009/cintools build/square.so  test.c   -o test/usr/local/lib/liblvrtdark.so.9.0: undefined reference to `std::basic_istream >& std::basic_istream >::_M_extract(float&)@GLIBCXX_3.4.9'/usr/local/lib/liblvrtdark.so.9.0: undefined reference to `std::basic_istream >& std::basic_istream >::_M_extract(double&)@GLIBCXX_3.4.9'/usr/local/lib/liblvrtdark.so.9.0: undefined reference to `std::basic_istream >& std::basic_istream >::_M_extract(double&)@GLIBCXX_3.4.9'/usr/local/lib/liblvrtdark.so.9.0: undefined reference to `std::basic_ostream >& std::basic_ostream >::_M_insert(double)@GLIBCXX_3.4.9'/usr/local/lib/liblvrtdark.so.9.0: undefined reference to `std::basic_istream >& std::basic_istream >::_M_extract(float&)@GLIBCXX_3.4.9'/usr/local/lib/liblvrtdark.so.9.0: undefined reference to `std::basic_ostream >& std::basic_ostream >::_M_insert(double)@GLIBCXX_3.4.9'collect2: ld returned 1 exit statusmake: *** [test] Error 1
  

  Running ldd reveals that liblvrtdark.so.9.0 is used for the execution of labview.

  In order to investigate on what could be the cause of the problem, I have compiled the nidaqmx basic examples, and I don't have an error. Current running ldd as reveals that he uses liblvrtdark.so.8.2 for the view of laboratory, time of execution.

  My suspicion is that some components of labview are being compiled with gcc 3.4 while others are being compiled with gcc 4.1 (which is the default compiler in RHEL 5).

  Any ideas how I could fix the build errors?

  Thanks in advance for your suggestions.

  PS.

  I enclose a tar file with the source files and here are the details of the ldd:

  ldd build/square.so         linux-gate.so.1 =>  (0x008de000)        liblvrtdark.so.9.0 => /usr/local/lib/liblvrtdark.so.9.0 (0x00b9c000)        libc.so.6 => /lib/libc.so.6 (0x00110000)        libstdc++.so.6 => /usr/local/lib/LabVIEW-2009/patchlib/libstdc++.so.6 (0x009a7000)        libm.so.6 => /lib/libm.so.6 (0x00756000)        libdl.so.2 => /lib/libdl.so.2 (0x00256000)        libpthread.so.0 => /lib/libpthread.so.0 (0x0025a000)        /lib/ld-linux.so.2 (0x00b80000)        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00272000)
  
  ldd /usr/local/natinst/nidaqmxbase/lib/libnidaqmxbase.so.3.3.0         linux-gate.so.1 =>  (0x00e50000)        libnidaqmxbaselv.so => /usr/local/lib/libnidaqmxbaselv.so (0x00248000)        libc.so.6 => /lib/libc.so.6 (0x00689000)        /lib/ld-linux.so.2 (0x00b80000)        liblvrtdark.so.8.2 => /usr/local/lib/liblvrtdark.so.8.2 (0x00e51000)        libdl.so.2 => /lib/libdl.so.2 (0x00813000)        libpthread.so.0 => /lib/libpthread.so.0 (0x001b0000)        libstdc++.so.5 => /usr/lib/libstdc++.so.5 (0x009c7000)        libm.so.6 => /lib/libm.so.6 (0x00b0a000)        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x0050c000)
  

  Hi mimi,

  I'm happy to report that I managed to get the code to work. I have included some of the steps I experienced the problem in case it might help improve the documentation or future generations.

  In response to your question about the "error 1" reported by do, it's just an indication that detected a compiler error (it probably resembles the return code of the compiler).

  The errors ' undefined reference... @GLIBCXX_3.4.9 "have been narrowed down. The generated labview shared library, the square.so, links to /usr/local/lib/LabVIEW-2009/patchlib/libstdc++.so.6 which is a symlink to usr/local/lib/LabVIEW-2009/patchlib/libstdc++.so.6.0.9. I decided to compare this version of libstdc ++ that included with RHEL:

  strings /usr/local/lib/LabVIEW-2009/patchlib/libstdc++.so.6 | grep GLIBCXXGLIBCXX_3.4GLIBCXX_3.4.1GLIBCXX_3.4.2GLIBCXX_3.4.3GLIBCXX_3.4.4GLIBCXX_3.4.5GLIBCXX_3.4.6GLIBCXX_3.4.7GLIBCXX_3.4.8GLIBCXX_3.4.9GLIBCXX_FORCE_NEW
  

  strings /usr/lib/libstdc++.so.6 | grep GLIBCXXGLIBCXX_3.4GLIBCXX_3.4.1GLIBCXX_3.4.2GLIBCXX_3.4.3GLIBCXX_3.4.4GLIBCXX_3.4.5GLIBCXX_3.4.6GLIBCXX_3.4.7GLIBCXX_3.4.8GLIBCXX_FORCE_NEW
  

  So libstdc ++ RedHat does not include a string for GLIBCXX_3.4.9.

  With this in mind, I was able to get my test application to compile using the version of LabVIEW libstdc ++ using the following makefile:

  .PHONY: all cleanCPPFLAGS=-I/usr/local/natinst/nidaqmxbase/include -I/usr/local/natinst/LabVIEW-2009/cintoolsLDFLAGS=build/square.so \        /usr/local/lib/LabVIEW-2009/patchlib/libstdc++.so.6 \        -Wl,--rpath -Wl,/usr/local/lib/LabVIEW-2009/patchlib/
  
  all: test
  
  clean:        rm -f test *.o
  

  When you try to run the application, I got the following error:

  ./test: error while loading shared libraries: /usr/local/lib/liblvrtdark.so.9.0: cannot restore segment prot after reloc: Permission denied
  

  But apparently, it's because of SELinux prohibiting the use of libraries shared with moving text.
  This can be disabled by running /usr/sbin/setenforce 0 as root.

  The test application now works!

  See you soon,.

  RW

• What is a low cost switch which can speak with Labview?

  Hello! I apologize if this question is in the wrong forum auxiliary; Let me know a more appropriate and I will happily move it.

  I have a chip test with four aircraft on what I measure through an amplifier to lock. Currently, we can make a measurement, then have to physically move the connection to test the following. I would like to automate this process. I hunted around for a cost relatively low switch that can talk with Labview and allow him to select one of the four signals in turn, but did not have much luck. I was wondering if anyone had recommendations or devices that they had worked with.

  Thanks in advance,

  Dan

  Dan,

  I was looking at using reed relays.  Download those with golden contacts so that they work well to currents microampere.  Use a with digital outputs DAQ card to drive the relay.  Before you buy, check current relay coils and exits Digital DAQ hardware.

  Lynn