Multiporcessing en labview- URGENT

je dois développer une interface maître qui contient plusieurs données. Ces dernières, je veux les utiliser dans d'autres interfaces esclaves, dont les entrées/sorties vont être communiquées de l'interface maître. je cherche à réaliser ça de façon que j'applique la notion de multiprocessing, c a d, les différentes interfaces peuvent être exécutées en mm temps et je peux aller de l'interface maître à l'interface esclave et vice-versa, sans que je reste bloqué dans une interface et je ne peux aller à l'autre que si j'arrête son exécution. Merci de m'aider c'est très urgent!

Here's a translation:
I need to develop a master interface containing some data. I want to use this data in other slave interfaces, in which the inputs and outputs will be sent back to the master interface. I plan to implement this using a multi-processing method, that is, the different interfaces can run at the same time and I can switch from the master to slave interface and vice versa, without being stuck on one interface and unable to switch to another without first stopping the current one. Please help, this is very urgent!
It would help if you could provide more details. Have you started any work on this? Can you provide front panels showing the different interfaces, and how they relate, even if you do not yet have code behind them? There are lots of ways you could pass data around. Do you want the master to be the central storage for all the data, and the slave interfaces just provide different ways to access that data? Or, is each slave a separate device with its own data, and the master should query each slave for the data? Figure out what sort of model will suit your needs.

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Matlab to labview(urgent please)

data=load('D:\d.txt');
for n=1:240;
    t=1024*n; i=t-1024+1;
    a=data(i:t,1);
    elev=-data(i:t,2);
    p=data(i:t,3);
    r=-data(i:t,4);
please ane one help how to code in labview for above matlab procedue.. urgent please
thanks & regards
srinath
Solved!
Go to Solution.

respected sir
here i am sending text file also.. here the first column shows the data of the ''a''
   the second column shows the data of the ''elev''
   the thied column shows the data of the ''p''
     the first column shows the data of the ''r''
for n =1:240; shows that loop count is 1 to 240
      t=1024*n; i=t-1024+1; shows the conditions
      a=data(i:t,1); shows during hte first loop it has to read first column 1024 values and during the 2nd loop count t has to read first column 1025 to next 2048 values and cont.. up to 140 times
      elev=-data(i:t,2); shows during first loop it has to read 2nd column 1024 values and during the 2nd loop count 2ndhas to read 2nd column 1025 to next 2048 values and cont.. up to 140 times
     p=data(i:t,3); shows during first loop it has to read 3rd column 1024 values and during the 2nd loop count 2ndhas to read 3rd column 1025 to next 2048 values and cont.. up to 140 times
      r=-data(i:t,4);shows during first loop it has to read4th column 1024 values and during the 2nd loop count 2ndhas to read 4th column 1025 to next 2048 values and cont.. up to 140 times
   end
i think ex:
thanks and regards
srinath
Attachments:
Book113.zip ‏3411 KB

Labview urgent help

How can I change this block diagram of lighting system to a system that turns on the light for a specific set time when detects any motion?I am using pir sensor in the hardware and interfacing it with labview using arduino.Here is the image of the circuit 2.bp.blogspot.com/-ZMCWEuwsGAo/UKaNDNWuDZI/AAAAAAAAATU/HXcEtrJbDHA/s1600/Capture.PNG
Never feel ashamed of learning something from others

Please keep it all in one place.
(You really need to do some basic LabVIEW tutorials first. Also please use a suitable post title. Every post here is about LabVIEW, so that word is redundant. Your subject lines contains no useful information about the question at all. Also note that we have a weekend, so unless you pay us overtime we answer at our own pace. Why is it urget? Is the school project due on Monday? )
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[Urgent] LabVIEW locked?! Help!!!!

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Hi Xiaofei,
I have noticed similar behavior only when you copy and paste code from a higher version of LabVIEW to a lower version. If this is not what you are doing, did you try simply restarting LabVIEW? If none of this works, you should reinstall/repair your LabVIEW installation.
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Bonjour,
La réponse à été donnée dans ce post :
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Need urgent help with communicating with the HP 4155B analyser with Labview

i folks,
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Hi,
Thanks for the help. I now have communication with the instrument.
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Urgent labView coding required

sir, can you please bulid a VI for me that-
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Sir, will it be possible to use two use timers and two indicators for this purpose.. sir, please help me out, me in a complete mess...

Please keep all related questons in one place:
http://forums.ni.com/ni/board/message?board.id=170&thread.id=325397&jump=true
Thanks!
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While a reinstall may be the ultimate solution, it may take considerably more than 20 mins. Does this problem occur if you create a new vi and try and edit it? What O/S, how much memory and disk space do you have? I haven't touched 6.x in a number of years and don't have it installed, at the moment, on anything available.
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URGENT: please help to convert Tektronix TDS754C Labview driver 7.0 to 6.1

Hello,
Could someone please try to convert Labview 7.0 driver to a version 6.1?
I attached Tektronix TDS 754C Labview driver 7.0 below.
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Attachments:
tktds7xx.zip ‏1732 KB

Try this. The error was just because the functions are part of the LabVIEW distribution and had nothing to do with converting the driver.
Attachments:
tktds7xx_61.zip ‏1414 KB

Looking help for developing labview code [Urgent]

Hi,
I need help in developing labview code. I am new to labview and will appreciate if someone can help me in this matter. I need to control the intensity of AC load (halogen lamp with 2kW,230V,50Hz) using Labview and Arduino. But my project using interrupt in Arduino, so it is not possible to use Labview Interface For Arduino(LIFA). I searched and it might be possible to use VISA serial in this matter. Attached is the circuit and the code of Arduino. Someone who is expert in this matter can help me?
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Solved!
Go to Solution.
Attachments:
Zero Cross Circuit.docx ‏203 KB
Triggering Circuit.docx ‏48 KB
Coding for Arduino.txt ‏7 KB

Hi,
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Urgent: question about timing in LabVIEW

Good Evening ..
First of all, I'am a labVIEW beginner so be easy on me!
I want to check if an input has the same value for a certain amount of time, for example, if some input has a voltage above 2 V for 10 seconds, how can I express that using a formula node ? If it's not possible then what should I do ?
I wrote the following program:
int i,j ;
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I need to make the steps between i increments seperated by one second, but I don't know how to make LabVIEW understand that!
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Best Regards

As has been said, you really should check out some of the online tutorials:
LabVIEW Basics
LabVIEW 101
With that said, I think you want to get away from using the DAQ Assistant and use some of the more basic nodes. You can actually set the sample rate of the DAQ and that will be constant. So you can then get a sample and compare it. If the value is in the right range, increment a counter. If it isn't, reset the counter. Once the counter reaches a certain amount, you are done.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines
Attachments:
High for 10 seconds.png ‏22 KB

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We are currently seeking to fill a LabView Software Engineer position for our client in Houston, Texas. We are a Houston, Texas based firm specializing in process optimization for industrial IT. We offer competitive compensation with good growth potential. For further information and to apply today, contact us at [email protected] or call 713-532-1280.

Please post your question to [email protected]

REALLY NEED URGENT HELP with typedef struct char in LabVIEW

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So I am calling a DLL inside my LabVIEW VI.
Inside the DLL, I have the following structure:
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(Note that File_or_Interactive and Input_or_Output are typedef enum.)
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However, it's not working --> const Geo_Tuple coordinates does not have the correct structure.
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How do I implement
typedef struct
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} Geo_Tuple;
So that I can use it here: set_Geo_Coordinates(const File_or_Interactive State, const Input_or_Output Direction, const Geo_Tuple coordinates)
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How have you configured your call library node? To get a representation in LabVIEW of your Geo_Tuple type you'll need to create a cluster that contains 21 U8 elements, which you can do by creating an empty U8 array and wiring it to "Array to Cluster" set to 21 elements. Connect this to the input side of the call library node. On the output side, convert back to an array, and from there convert it to a string.

[Urgent]How can I write to physical memory by using LabVIEW 8.2??

Hi everybody,
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Duplicate post: http://forums.ni.com/ni/board/message?board.id=170&thread.id=289539&jump=true
LabVIEW Champion . Do more with less code and in less time .

Question fonctionnement logiciel labview , pour TPE lycée, Urgent SVP

Bonjour,
Nous sommes élèves d'un lycée et nous travaillons, dans le cadre d'un TPE sur la détection des exoplanètes par la méthode de transits: une variation de la courbe de la lumière d'une étoile prouverait l'existence d'une exoplanète en rotation autour de celle ci.
notre problème:
Nous avons reussi avec le logiciel Labview à faire une acquisition des données de notre expérience, et nous souhaitons afficher en temps réel la courbe de cette acquisition. Cependant, le logiciel nous affiche les données seulement en temps réel, il nous montre la variation de la lumière, sur l'instant, et nous aimerions pouvoir voir la courbe de cette lumière sur plusieurs secondes ( 10 ou 20 s). Il nous faudrait donc que le logiciel enregistre les données précédentes dans le temps et nous ne trouvons pas le moyen de le faire, surtout que nous ne comprenons que très peu l'anglais.
Je vous met en pièce jointe le document labview que nous avons tenter de réaliser pour pouvoir afficher une courbe de la lumière dans le temps.
et une image exposant notre problème.
J'espere vraiment que vous pourrez répondre à ce message et nous aider, nous sommes bloqués à cette étape pour le reste du TPE, et le professeur ne sait, lui aussi, résoudre ce problème.
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TL - lycée jean monnet
Attachments:
TPE_exoplanete.vi ‏81 KB
TPE acquisition labview2.JPG ‏18 KB

Alors... je ne sais pas ce que vous avez comme matériel d'acquisition, mais selon la configuration du VI express la fréquence d'acquisition (Rate) est de 1000 Hz et les acquisitions se font par bloc de 1000 points (Samples to read).
Donc lorsque votre programme s'exécute, tant que vous ne cliquez pas sur "Stop", chaque seconde vous récupérez un bloc de 1000 points correspondant à une seconde de signal et vous affichez ces 1000 points dans un graph. Donc en effet vous n'avez pas l'historique, vous ne voyez que la seconde écoulée de signal.
Pour avoir un historique, le plus simple est de remplacer le Graph (Waveform Graph) par un Chart (Waveform Chart). D'une éxécution de boucle à l'autre le chart va conserver les données ou "les ajouter à la suite bloc par bloc".
La longueur de l'historique par défaut du chart est de 1024 échantillons, vous pouvez modifier cette taille en faisant un clic droit sur le chart, puis "chart history length" (littéralement : longueur de l'historique du chart), mettez 20000 (20 sec * 1000 Hz)et vous pourrez ainsi visualiser 20 secondes de signal.
Pour ce qui est de l'enregistrement des données vous pouvez utiliser un VI express qui s'appelle "Write to measurement file", de la même manière que pour le DAQ Assistant vous pourrez le configurer afin d'avoir le type de fichier que vous souhaitez.
Je suppose que le TPE doit être une occasion pour vous de mettre les mains dans le camboui donc je vous souhaite bon courage, si vous avez plus de question n'hésitez pas.
PS : une très bonne source d'inspiration pour les débutants : Help >> Find example... >> onglet "search" et faite une recherche avec "graph".
When my feet touch the ground each morning the devil thinks "bloody hell... He's up again!"

Multiporcessing en labview- URGENT

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