Journal d'enregistrement avec Signal Express et oscillo Tektronix MSO4034 : les 4 voies dans un même fichier?

Bonjour,
Je réalise des enregistrements des 4 voies analogiques d'un d'un oscillo Tektronix MSO4034 avec Signal Express 2.5. Les données sont bien enregistrées dans des fichiers TDMS et txt, mais il y a 1 fichier par voie.
J'aurai préféré avoir les données des 4 voies dans un seul et même fichier, mais je ne trouve pas l'option qui permet cela : est-ce possible?
Merci d'avance pour vos réponses.

Bonjour,
Merci pour votre réponse rapide.
Afin de contourner le problème, j'ai téléchargé le driver suivant:
http://sine.ni.com/apps/utf8/niid_web_display.download_page?p_id_guid=6E23DB10D9FC2B05E04400144FB7D2...
Ca marche plutot bien, avec un vi d'exemple fournis j'arrive à faire l'acquisition d'une voie de mon oscillo. A priori, il ne resterai plus qu'à enregistrer les données de la waveform dans un fichier txt comme je le souhaite.
Seulement, après un essai du vi d'exemple permettant d'acquérir plusieurs voies, les voies sont visiblement acquises l'une après l'autre. En cablant la voie 1 et la voie 2 de mon oscillo sur un meme signal de sortie d'un GBF, les signaux acquis sont décalés temporellement (décalés sur mon graphe Labview, pas à l'écran de mon oscillo). Est-il possible d'acquérir simultanément (j'entend par simultanément 1 valeur par voie à chaque n*dt) les 4 voies de l'oscillo?
Merci d'avance.

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Générer un signal avec signal express (erreur 200077)

Salut à tous,
J'ai acquis une carte NI PCI 6010 et je la pilote via Labview Signal Express.
Ce que je veux c'est émettre un signal (admettons sinusoïdal) sur une des sorties analogiques de la carte. Je créé donc ce signal avec l'étape "Créer un signal analogique", puis j'ajoute une étape "DAQmx - Générer" et là il y a une "Erreur de l'Assistant DAQ" qui arrive! Cela correspond à l'erreur 200077 qui annonce qu'il y a un problème avec le type de cadencement d'échantillonnage.
J'ai alors ouvert un exemple préinstallé dans Labview Signal Express qui génère un signal sinusoïdal et le problème persiste.
Merci de m'aider le plus vite possible.

Bonjour.
L'erreur que vous rencontrez indique que vous essayez d'utiliser une propriété dans votre génération qui n'est pas compatible ou disponible sur votre carte.
J'ai refait les mêmes étapes que vous et je n'ai pas d'erreur.
Quelle est l'amplitude du signal que vous voulez générer et quelle fréquence d'échantillonnage choisissez-vous?
Cordialement.

PB option d'enregistrement Signal Express

Bonjour,
j'essaye de faire avec Signal Express le type de travail suivant :
+ Enregistrer une tension pendant 5s, Calculer la moyenne des valeurs acquises, enregistrer ces valeurs dans un fichier.
+ Je souhaite faire cet enregistrement toutes les heures pendant 24h.
Pour réaliser ces opérations je configure dans Signal Express les conditions de démarrage et d'arrêt de l'onglet "Option d'enregistrement". Mais quoi que je fasse l'enregistrement ne se fait qu'une seule fois...!!!!!!!
Dans l'exemple de la pièce jointe, j'essaye de démarrer immédiatement l'enregistrement pendant 5s de ma tension, toutes les 30s et cela 3 fois. Mon paramétrage ne fonctionne pas, l'enregistrement ne se fait qu'une seule fois !!!
Est-ce que ces fonctions de Signal Express fonctionnent réellement ?
Si oui comment faire pour les utiliser correctement ?
Merci d'avance pour vos réponses.
Pièces jointes :
Image_Signal_Express.JPG ‏205 KB

Bonjour,
J’ai fait le
test sur mon ordinateur. L’acquisition et l’enregistrement fonctionnent très
bien pendant 5 seconde toutes les 30seconde
3 fois.
Avez-vous bien
spécifié la condition d’arrêt (durée 5s) ?
Avez-vous bien
coché les signaux que vous voulez enregistrer dans l’onglet Sélection des
signaux ?
Sur votre
imprime écran, il est possible de voir un warning à coté de la tache de DAQmx,
pouvez vous connaitre la raison de celui-ci ?
Cordialement
Samuel G.
Samuel G. | Application Engineer Team Leader
Certified LabVIEW Developer
National Instruments France
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Été de LabVIEW 2014
12 présentations en ligne, du 30 juin au 18 juillet

Je n'arrive pas à enregistrer le réglage par défaut de l'imprimante dans Pages09. (Fichier, Format d'impression, Enregistrer par défaut)

Je n'arrive pas à enregistrer le réglage par défaut de l'imprimante dans Pages 09. (Fichier , Format d'impression, réglage par défaut).

excuser ma reponse partiellement en Anglais.
Si vous avez "enabled" le "Large Document Format" dans le passer pour sauver en "PSB format". Alors vous pouver sauver votre travail dans se format. Je pense que s'ait 4Gig dans CS2.
Richard

Ajout d'un affichage dans Labview Signal Express

L'ajout d'un affichage (quand il ne s'agit pas d'un graphe par exemple ajout d'un affichage "Thermomètre") dans Labview Signal Express est impossible et conduit à la fermeture du logiciel, quelqu'un a-t-il une solution pour remédier à ce problème ?

Bonjour yj55,
Ce problème effectivement n'est pas normal.Avez-vous un message d'erreur qui s'affiche? Est-ce un problème que vous n'aviez pas du tout avant?
Vous pouvez par exemple tenter de faire une réparation de Labview Signal Express
Cordialement
Mathieu B
National Instruments France
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Forum Aéronautique, Spatial et Défense. Avec la participation exceptionnelle de Bernard DUPRIEU, Res...

Report generation toolkit and signal express user step : problem of closing reference in "Stop" event

Hi all,
I'm trying to make a package of Vis to easily make Excel reports with Signal Express. I'm working on LabVIEW 8.2.1.
I'm using the report generation toolkit, so I build a .llb from my project which contains all the hierarchy of my steps, but also the hierarchy of dynamic VIs called.
I have made some steps, like "Open Workbook", "Write Data", etc.
My steps run well, excepts one step : "Close Workbook".
If my "Close Workbook" step is firing on "Run" Signal Express event, I have no error, so my reference is properly closed.
But if my "Close Workbook" step is firing on "Stop" Signal Express event, I have an error "1", from "Generate Report Objectrepository.vi".
I feel that I'm trying to use a reference which has been killed in the "Stop" step...
I would like to know what exactly do Signal Express on "Stop" event and why my close function does'nt run well.
Thanks,
Callahan

Hi Callahan,
SignalExpress (SE for short) does the following on the Stop event:
1. Takes the list of parameters that SE found on your VI's connector pane, and sets the values that the user set from the "Run LabVIEW VI" configuration page, if any.
2. Then tells the VI that SE is running the Stop event by setting the Enum found on your VI's front panel. This in turn should produce some boolean values telling your VI to execute the Stop case.
3. The VI is then run, with those values and states.
4. SE checks to see if any errors where returned.
5. Since this is the Stop event, SE releases the reference to the VI which it possesses.
Questions for you would be, is the reference to your Workbook linked to a control on your connector pane, or held in a uninitialized Shift Register. If it's held in a Shift Register, SE would not be aware of it, and would not be able to affect that reference.
Hope that helps. Feel free to post your LLB if it doesn't.
Phil

Can I save data in a snapshot from signal express 2013 LE?

Can I save data (in txt or excel format) from a snapshot from signal express 2013 LE? My data buffer is too larege to export to excel. When I try to take a snapshot, I do not see any data. Are snapshots supported in the LE mode? This is the free version that comes with the USB 6009 ADC.

Yes, the snapshot function is available for SignalExpress 2013 LE. Does the snapshot function as intended when you try other projects?
Daniel P.

How do I get channel names written into a logged ascii file in Signal Express

Hi there,
This maybe a rookie question but I am a relative rookie to this software, and I hope it has an easy fix!
Background:
Take a load of analogue inputs from a DAQ device into Signal Express, first thing that hits me is that unlike labVIEW you cannot right click in the channel configuration window and change the name from say... Dev2_ai0 to Air Pressure? I feel that if this was possible then I would overcome my problem? anyway I can't so onwards...
I goto the DAQmx Acquire window on the top left and can right click and rename the channel, which is great... however this does not translate to the logged data as I get the ai0 channel names across the top of the columns and not the names that I have put in.
Is there anyway of getting data like the attached snippet?
Many thanks for your help in advance.
Neil Barker, Redbull Technology.
Attachments:
Channel names.gif ‏4 KB

Hi Dan,
Thanks for the reply, that has certainly fixed my issue as I wasn't expanding the channel and selecting the channel that I had renamed.
One last thing though:
I now not only get the individual channel name but the prefix for the DAQmx Aquire, for instance I get the Input of Braketest and then the channels under the input data.
It looks a bit like this....
Braketest - Front Pres
Braketest - Rear Pres
Braketest - FR Temp
Braketest - FL Temp
etc etc...
Now all of the channel names at the top of the columns have this long name. Can this be rectified? can I remove the "Braketest" bit?
By the way I am saving it as an ASCII so that I can read it in excel.
Many thanks, Neil.

Using Signal Express VI for DAQmx, timing & file size issues

I am using a Signal Express VI with my DAQmx. Long story short, my DAQmx VI's don't work in LV 8.6 (possibly IT installation error). I have a few issues (I'm a beginner so be easy).
First, I'm confused on how to get the timing correct. I am trying to read a 100 samples (2 channels) average them and repeat this at 30Hz and record this data.
Second, everytime I open the Signal Express VI (in my block diagram) and change sampling for example, click OK, then save my VI before running my program. I noticed the file on disk increased in size by the megabytes! All I changed were the sampling settings.
I appreciate any input, thanks in advance!
-Michal
Attachments:
Philtec_09-22-09.vi ‏2589 KB

To your first concern, it sounds like DAQmx was installed before LabVIEW. Just reinstall DAQmx and it will work fine in LabVIEW.
For you second concern. To get 100 Samples at 30 Hz, you will need to change your channel setup in signal express. You will need Continuous Aquisition, with 100 Samples to Read at 3000 Hz. Then you code should work as expected.
Chris Bakker
National Instruments
Applications Engineer
Check out LabVIEW 2009 and the New X-series DAQ!

Populating the Signal Express Category on the Functions Palette

Hi
Can anybody help with advice on how to populate the signal express category on the block diagram Functions palette ?
Thanks
Solved!
Go to Solution.
Attachments:
LV Functions Palette.PNG ‏14 KB

Hi Ewan,
Uninstalling and reinstalling in the right order would ensure that everything was properly associated. However, I don't think that should be necessary yet in your situation. Please go to Control Panel > Programs and Features > National Instruments Software to see the full list of National Instruments software you have installed. From here you should be able to select any individual installation from the list and select "Repair". Instead of just seeing that something is already installed and exiting, this should go through the installation and check for corruption. As well, this should add the correct associations if they were currently missed due to the order of installation.
Please try running a repair of SignalExpress 2013 and restarting your computer, then check to see if the functions palette in LabVIEW is fully populated.
Thanks!
Emily C
Applications Engineer
National Instruments

LEGO Mindstorms 2.0 crashes at startup when LabView Signal Express is installed first

When NI Circuit Design Suite Education Edition is installed first in a computer and the LEGO Mindstorms software second, the LEGO Mindstorms software doesn't work, it reports the following:
Error: A required file is broken
Possible Solutions: Reinstall the LEGO Mindstorms NXT Driver (tried but doesn't work)
Error code: 1003
Ordinal not found
The ordinal 18 could not be located in the dynamic link library NIVISV32.dll
Error loading "fantom.dll"
The operating system can not run %1
On other computers the LEGO software starts running, it displays part of the initial screen and then a small window opens saying that the Mindstorms software has has an error and that it will close. The previous report doesn't show.
If LabView Signal Express is uninstalled and then the LEGO software reinstalled, the LEGO software works.
I've dowloaded and installed new and old versions of the NIVISV32.dll and this doesn't correct the problem. I went as far as version 4.20 of the dll because it is dated in 2007 and the dll file installed by the LEGO software when it works is also dated 2007, but if I install the dll without uninstalling LabView Signal Express, the LEGO software continues not working.
Please advice how to correct this problem without having to uninstall LabView Signal Express first. If the LEGO software is installed first, is LabView Signal Express going to use and not to replace the old 2007 version of the dll installed by the LEGO software? Is there any LEGO software update that corrects this problem?
I repeat: I know a solution is to uninstall LabView Signal Express, install LEGO Mindstorms and then reinstall LabView Signal Express but I have 60 computers already cloned and deployed with this problem, so I don't want to go to this long process to fix the problem. The computers are using Windows 7 and problems happen on both the 32 and 64 bits versions of Windows 7.
Any ideas???
Solved!
Go to Solution.

I couldn't reproduce the error either, but in our x86 computers this problem appeared after several months; we used LEGO Mindstorms last time in Summer 2011 without any problems and just three weeks ago when we were checking the computer for our Summer 2012 classes if when we noticed the problem. I’m still going to try to reproduce the error in an x64 computer where the problem appeared immediately.
Anyway, I’m attaching a word file with images of captured screens where you can see the error reports generated by LEGO Mindstorms and a series of steps uninstalling and reinstalling these program plus LabVIEW, until LEGO Mindstorms finally works after having uninstalled all traces of LabVIEW.
Images can be expanded and zoomed in to a better view of the details and if I can reproduce the problem in an x64 computer I’ll let you know.
Please see if you can find out something based on the images I’m sending.
Thank you.
Attachments:
LEGO PROBLEM.doc ‏3129 KB

How can I convert an array to a waveform in signal express

hello friends,
I have imported a labview VI in signal express. After processing the data in VI , I have stored the result in a form of array. Now I want to see this array in a form of waveform in signal express. How to go about it.
Vipin

Sorry, this is the kind of thing that happens when you have been out for too long.
Message Edité par chilly charly le 10-22-2006 11:09 AM
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...
Attachments:
array%20to%20image[1].png ‏3 KB

Export to Excel problem in Signal Express 2012

Equipment used: PXIE-8102 CELERON T3100 1.9GHZ Controller Windows 7, PXIE-1071 4 Slot Chassis, PXIE-4140 4-Channel SMU 1.7.5 version.
I am using Signal Express 2012 and the SMU to plot the I/V characteristics of FET and other active devices. I am able to obtain the anticipated curve traced results but I am not able to Export the data to Excel directly from the Data View using the Microsoft Excel option. The error message is: Data could not be sent to Microsoft Excel. Please ensure you have a properly licensed version of Microsoft Excel. See attachment.
We have checked our version of Microsoft Office, it is Professional Plus and has the correct volume license so it does not revert to a home or student version.
I have been able to use the Export to Excel function directly from the Dataview when I was using one of the waveform tutorials supplied with Signal Express so I suspect it is a function of the SMU.
In conversations with an NI support engineer he felt it may be a problem with "an active x call is just not seeing the license for some reason", his suggestion is to drag the data into Excel rather than use the Data view tab. Because the SMU is being used in a production environment it is not really appropriate to have the operator work at this level so I would rather figure a way to have the data exported using the Data View tab.
Anyway please can you let me know if there are any known work around for this issue.
Thank you

Calvin1957,
I am not seeing any attachments in the first post or this latest post. The images should be added using the attachments section when creating the post. You should also be able to insert an image using the insert image button in the toolbar. Let me know if you have any questions. Thanks!
Robert B
Applications Engineer
National Instruments

Can Signal Express prompt the user for the next ascii file name?

I am using the following to collect data from Thermocouples and Strain Guages in our plant. It allows me to plt data every second, while recording only every 3 seconds to cut down the file size.
Big Loop-
Small Loop-
      Conitional repeat...
      DAQmx Aquire...
      Statistics (mean) Temp...
      Statistics (mean) Press...
      Current Iteration...
End Small Loop-
Save to ASCII/LVM
The problem is that I have to configure the save step as "overwrite once, then append" so I get a single file each time the project runs. How can I get Signal Express to either prompt the user for a new file name with each run or have the ascii file saved into the log directory for that run. As it stands now, the file gets overwritten with each new project run.
Thank you.
new user

Hi crawlejg,
You can set signal express to increment the file being created each time. But if you are looking for 1 new file each time the project runs you will have to use LabVIEW as this advanced functionality is not available in Signal Express. If you need help getting this to work in LabVIEW or have any other questions please feel free to ask!
Sincerely,
Jason Daming
Applications Engineer
National Instruments
http://www.ni.com/support

How can i generate AMI line codes in LabView signal express?

i wish to conduct a project that uses AMI line codes. but i have a hard time using signal express to generate it. can anyone help me with that?

Hello Barry,
That is really a problem, in LabVIEW, we can only convert vi to the previous version, I have version 7.1 and so I can only convert to version 7.0 and you cannot open this too.
But I think that it's very easy to do what I'm trying to explain you.
Go to the cluster group in the functions pallete. Place an unbundle by name function in the diagram and connect it to the data that's comming out of the FFT Power spectrum vi - the pink (or watever) wire.
Click in the white part of it (it should contain something like f0), choose magnitude.
This is now an array that you can connect to the peak detector function.
Take care about the threshold and width parameters of the peak detector.
Take a look at your signal and decide the amplitude and width of the peaks you want to detect. The threshold is the amplitude above what you consider as a peak, the width is a little bit more complicated - to begin, 3 or 4 should be a good number if you signal is not too noisy - bigger widths will somehow do a kind of a low pass filtering to your signal.
The position output of your peak detector is an array of locations where your peaks were found.
Keep in mind you are now working in frequency domain and that position means something in the frequency domain.
The array you placed as input of the peak detector is an array of points starting in f0 and separated by df (the other elements of the cluster).
So to calculate the real value of the peaks, you have to multiply them by df and add them f0.
Sorry by the big text and sorry if I went too much in detail,
Hope it helps,
Paulo

Journal d'enregistrement avec Signal Express et oscillo Tektronix MSO4034 : les 4 voies dans un même fichier?

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