Comment coupler DAQ et CAN?Synchro par bus RTSI?

Je veux piloter une carte CAN avec une carte DAQ, en utilisant le mode RTSI de la CAN.Donc, elles devraent être synchroniser.Mais quand j'envoie des trames de données, elles ne sont pas récupérées dans le buffer au top du signal RTSI.Et quand j'arrête d'envoyer le signal RTSI, la CAN continue à recevoir des trames de données qu'on envoie.
A quoi servent les trames RTSI, car elles sont mises dans le buffer alors qu'on en a pas besoin?
Comment synchroniser la DAQ avec la CAN?

Bien que je développe des applications DAQ et des applications CAN, je n'ai jamais eu la nécessité de synchroniser un type de carte par l'autre. Je ne peux donc pas vous donner de conseils provenant de la pratique.
Voici toutefois quelques éléments qui vous aideront, je l'espère :
1) Différents exemples de synchronisation se trouvent dans la librairie LV (voir sous "..labview\examples\nican\can daq synchronisation"). Si tel n'est pas le cas, voir point 2).
2) Bien que je ne me souvienne pas de la version de driver exacte, je sais que la synchronisation CAN DAQ est apparue récemment. Je vous conseille donc d'installer les dernières versions (NI-DAQ 6.9.3 et NI-CAN 1.6) si vous deviez avoir des versions plus anciennes.
3) Il est bien évident que les cartes D
AQ et CAN doivent être reliées entre elles par un câble RTSI.
Meilleures salutations

Similar Messages

  • When creating a comment summary, I want to end up with a pdf of comments only. In addition, I do not want author, date, time, or page number to show in my comments summary. How can I do this?

    When creating a comment summary, I want to end up with a pdf of comments only. In addition, I do not want author, date, time, or page number to show in my comments summary. How can I do this? I do a lot of reading, and when I summarize my comments, I like to save these comments in a larger document I compile over time. I typically create a comment summary, export it to a text editor and find myself having to delete author, date, time, page number, and anything else that is not the raw and net comment. It would save me some good time if someone showed me how to do this. The reason I do not want any additional information is because it simply adds stuff I do not need in my compilation of summaries for large amounts of papers over time.

    What you're describing can't be achieved using the built-in comments summary function of Acrobat, but it can certainly be done if a custom-made script it used to generate the summary because then you're in full control of what's included in it and what's not.

  • Which DAQ card can give accurate specified sampling rate

    Dear friends:
    I have an application to sample the data from an analogue device with user specified sampling rate, e.g.171KHz. May I know which NI DAQ card can specify any sampling rate below 200KHz within tolerance  of inaccuracy of 1KHz? Appreciate for your help
    Andy   

    Do you need both accuracy *and* precision?  
    Precision will largely be determined by quantization effects as the sample clock must be an integer divisor of the board's master timebase.  For example, the 6259 M-series board that I commonly use has an 80 MHz master timebase which can be used to generate the sample clock.  In fact, I'm pretty sure it *is* used by default.   The nearest integer divisor when requesting 171 kHz will be 468, producing an actual nominal sample rate of 170.9402... kHz.  (A divisor of 467 would produce a nominal sample rate of 171.3062...)     The quantization doesn't really scale linearly over wide ranges of target sample rate, but for rates in the vicinity of 171 kHz, quantization steps are a bit less than 0.4 kHz, so you can expect to hit your target to within about +/- 0.2 kHz.
    Next you need to consider clock accuracy.  The 6259 board is rated at 50 parts per million accuracy at nominal temperature of 25 C.  I don't know the temperature effect or whether you need to concern yourself with it in your app.  But 50 parts per million on a target of 171 kHz amounts to less than 0.01 kHz accuracy error.
    So it would appear that the 6259 would be a candidate.  There are likely other cheaper M-series boards that could also work.  The older E-series had only a 20 MHz timebase, which would lead to quantization error of about 1.5 kHz.  Don't recall their accuracy specs, but quantization already puts you over your error budget.
    -Kevin P.

  • Supplying CAN devices with bus power

    Hello everyone,
    Is it possible to provide bus power to a CAN device with a PCI-CAN Series 2 card? 
    The manual is a little confusing in this matter.  Table 4-1 in the manual states that V+ is "Optional CAN power supply if bus power or external VBAT is required."  This makes me think that I can supply a CAN device with bus power from the card's internal source (as long as my jumper is configured for internal). 
    A few lines later the following statement is made: "V+ supplies bus power to the CAN physical layer if external power is required...it is not necessary to supply V+, unless you have configured the VBAT jumper for EXT."  This makes me think that V+ has nothing to do with supplying power to devices, and only with powering the bus on the card itself.
    If it is not possible to supply bus power with the NICAN card, what is the recommended method for powering a device on the same CAN network (assuming the device is not powered somewhere in its own circuitry)?
    Thanks for any help,
    Dave

    Hi Dabramsom,
    the part of the manual that I assume you are referencing is:
        "V+ supplies bus power to the CAN physical layer if external power is
        required. All High-Speed Series 2 PCI, PXI, and USB hardware is powered
        internally, so it is not necessary to supply V+, unless you have configured
        the VBAT jumper for EXT."
    The PCI-CAN/2 cards can be powered either internally or externally.
    To power the device externally the VBAT jumper should be configured for EXT,
    now your card will be powered by an external source, your card cannot be
    configured to be the source for another device. Please reference the following KnowledgeBase:
    What Do the Power Jumper Settings on the NI-CAN Cards Mean?
    As for powering your CAN device it really depends on your device; what are the power
    specifications? Can you consider using a battery?
    I hope this answers your questions.
    Christian A
    National Instruments
    Applications Engineer

  • CAN Transmitt frame on RTSI.

    Hi all!
    I have a problem, I want to send CAN frames when I receive an RTSI pulse. To do that i configured my CAN Network Interface, and i generated a pulse train. At the begining, i configured the delay between two pulse at 700µs. It seems to work, but i noticed that sometimes after a day or after a week, i get the warning 1073094950 : NI-CAN:  (Hex 0x3FF62126) You configured CAN transmit when a RTSI input pulses, and the RTSI rate occurs faster than CAN frames can be transmitted at the specified baud rate. Solution: Configure the source of RTSI pulse (i.e. DAQ counter) for a slower rate.
    I read in the data sheet : When you configure a DAQ card to pulse the RTSI signal
    periodically, do not exceed 1000 Hertz (pulse every millisecond). If the RTSI
    input is pulsed faster than 1kHz on a consistent basis, CAN performance will be
    adversely affected (for example, lost data frames).
    After that i configured the delay between to pulses to 1ms and tryed again.... with the same result... sometimes i don't know why i receieved this damned warning !!! I also tryed with 1,6 ms ... (the maximum i can have between two pulses).
    I don't know why i have these limitation from this card ! I know a solution will be to use FPGA instead on these poor CAN cards but i don't have the time to rewrite the code with FPGA (i meet the customer next week). So i just want to know if someone else meet this problem (and eventually has a solution) or can explain this strange phenomena ....
    Thanks.... for all your futures answers!

    Hi dirk!
    The port used to send the frame on RTSI pulse is only used for this .... in fact i only used one port of my 2 ports CAN board (as you suggest in your last message). Moreover, i put the comparator and mask to CFFFFFFF (to ignore incoming frames). So there is no other activity on this port !
    I already use Network interface this can not be improved.
    The pulse train used for the RTSI signal is generated by a NI board, and i checked the signal with a scope, it seems to be ok ... 
    The problem is in my application i can not decrease the frequency of the RTSI pulse ... otherwise i will not be compliant with the customer specification. My last idea to resolve the problem is to use two different ports (of two differents boards) to send the frames. I will send a RTSI pulse on each port every 2 ms... i will try and i hope it will work ...
    But  again if you have other ideas ....
    Thanks !

  • Problems with comments-enabled PDF: I can't see my client's comments

    Hello,
    I really hope somebody can help me.
    THE SITUATION: I have a comments-enabled PDF. The comments repository is located on my externally hosted webdav server. Both my client and I have local copies of the PDF, and up until today, my client was able to post comments on the PDF.
    THE PROBLEM:
    - Today, my client suddenly noticed that the review had "expired" and she can't post her comments.
    - I am able to see and post my own comments in the PDF, but I can't see my client's comments in the PDF.
    - My client can see her own comments. (I don't know if she can see mine.)
    - If I log into my webdav site with FTP, I can see my client's XML file which contains all her comments. I can also see my own XML file which contains my comments, and it is indeed updating each time I add a new comment.
    I thought it would be possible to import the XML file containing all her comments into the PDF. However XML is not a format that Acrobat allows you to import!!! It only will accept FDF, XFDF, or PDF!
    Phone tech support was spectacularly unhelpful. I seriously doubt "Nelson" from Bombay has ever used Acrobat in his life. He asked me to send the file to him, which I did, but I haven't heard back.
    So my question is:
    1) How can I get my Acrobat file to view the comments which are sitting on the comments server in an xml file? Why would it see mine but ignore hers?
    2) If I can't get the comments to show up, then can I at least import my client's comments, which are currently sitting in an XML file, into my PDF?
    bonus question: Why is there so little documentation about dealing with webdav comments repositories? Is it considered better to use acrobat.com instead of our own webdav server or something?
    This is Acrobat 9.1.0 Pro for Leopard.

    Thanks for your reply, Steve. Yes, she did say that there was an end date, but when I go there, I don't see one. Baffling.
    I have decided to go over to her office, create an archive of her PDF, then try to pull those comments into a new PDF.
    This is a GIANT PAIN. And egg in my face, after I've sold this client on the ease and convenience of a PDF workflow!
    So is there any way to get xml comments back into a PDF???

  • How can I determine Bus Speed

    Hi all
    Dumb question #2.
    The beast is a G4 MDD with dual 450MHz chips and the model number is M5183 and the machine number as per System Profiler is 406. Serial number is SG03402HK5W
    Got all that.
    I need to determine Bus Speed so I can buy the proper Ram Cards for this machine. It was supplies from the eBay seller with PC133 chips in there and surprisingly enough it runs 9.2.1 just fine.
    How can I determine whether my machine is a 100MHz or 133MHz.
    I suspect my Machine is not an MMD but a Gigabit Ethernet with dual 450 processors. Is this correct?
    John Fenn

    You can find all the G4 specs here to identify your machine and get the RAM specs and bus speed.
    -Douggo
    G4 Dual 867 MDD   Mac OS X (10.4.3)   1.25GB RAM; 3 HDD's; Pioneer 106D; 20" Cinema Display; 30GB iPod Photo

  • I need a portable daq that can measure up to 15 thermocouples that is usb

    Hello, a friend of mine that has no experience with labview is asking me about what daq can he buy in order to have a portable thermocouple measuring system.  It has to be usb so he can take it along with him and his laptop and that he can connect up to 15 thermocouples.  I saw some usb based systems that are specificly for thermocuple measurement but only have 4 inputs.  Is there any usb daq that I could use for this application and do I have to additionaly cancel any unwanted noise via programming???
    Solved!
    Go to Solution.

    Hi, Indeed there's only a usb up to 4 channels to manage termocouples, this is the NI USB-9211A. But I can suggest you something else:
    1. You can buy a SCXI chassis and the Control Module USB NI-SCXI-1600. And using a module SCXI-1102 you can handle up to 32 thermocouples. These are the links:
    http://sine.ni.com/nips/cds/view/p/lang/en/nid/14235
    http://www.ni.com/pdf/products/us/4scxisc278_ETC_196.pdf
    2. Another PAC you can use is CompactDAQ along 4 modules NI 9211 (4 thermocouples each one)
    http://www.ni.com/dataacquisition/compactdaq/
    http://sine.ni.com/nips/cds/view/p/lang/en/nid/14165
    3. And one more solution, probably the cheapest. You can buy any USB M-Series DAQ card for example, NI USB-6251 with the SCB-68 terminal block. You can connect your 15 thermocouples to the analog inputs and use the cold-junction compensation built in the terminal block.
    I hope you'll find useful this information.
    Best regards.
    Arturo Gómez | Applications Engineering
    Certified LabVIEW Associated Developer
    National Instruments Latin America
    01-800-010-0793
    ni.com/support

  • Comment débloquer mon Ipad bloqué par "impossible d'accéder à localiser mes amis

    Comment puis-je débloqué mon Ipad bloqué par la question suivante:" Impossible de localiser mes amis ouvrir l'App", mais je ne peux plus rien faire il s'éteint

    Bonjour,
    Suite à ce message:https://discussions.apple.com/message/23099194#23099194
    J'ai fait la manipulation suivante:
    -Aller sur le site apple.
    -Changer l'AppleID pour mettre l'ancien (celui du compte cloud).
    -Sur l'iPhone, aller dans réglages > icloud > supprimer le compte (taper le mot de passe).
    /!\ la suppression du compte n'entraine pas la suppression des données sur l'iCloud. Il supprime le lien entre l'iphone et le compte iCloud.
    -Revenir sur le site web
    -Remettre le nouveau AppleID
    -Sur l'iPhone aller dans réglage > iCloud > ajouter un compte (mettre le nouvel AppleID).
    -Rédemarrer l'iPhone, pour une synchronisation.

  • What is the newest version of NI DAQ i can use with LABVIEW 5.0

    Can Labview 5.0 be used with NI DAQ 6.8.9.
    The Cards I am using are IMAQ PCI 1411, 6013 and PCI DIO 96. Should this combination work together ?

    The most recent version of hte NI IMAQ software is version 2.5.5. You may want to replace version 2.2 with that and see if it helps. This link will take you to the download page.
    J.R. Allen

  • Synchronise DAQ and CAN using RTSI

    I do a CAN/DAQ measurement using 2 PCI cards and a RTSI cable. However, not all of my analog samples are timestamped
    (I'm missing 930 timestamps on a total of 4700 analog samples).
    I'm using the Net RTSI config, because with the Obj RTSI config I get nothing but random timestamps for my analog signal, while CAN timestamps are OK.
    What can cause this behavior?
    Thanks,
    David.

    First of all: thanks for your reply.
    Now, the problem:
    I started of one of the examples on the NI site (http://zone.ni.com/devzone/explprog.nsf/6c163603265406328625682a006ed37d/773da68471f9efa4862569e00072a0fc?OpenDocument) and modified this somewhat to log data as binary. I also added a VI to filter out only the CAN ID I'm interested in. (I tried to use an Object instead of a Network Interface, but that resulted in random timestamps for analog... don't know why. Didn't find an example that should work to test with).
    DAQ board is used as the master, CAN is set to timestamp the RTSI events.
    The result: sometimes less, sometimes more timestamps for analog than I have analog samples.
    I have included the sample LV6 program that I use for testing. Main C
    AN-DAQ-RTSI is for acquisition, Main Reporting to read the measured files. 2 sample measurements are included too. Second example only contains noise, but ALSO has different number of timestamps than samples for analog.
    Gee, I hope I didn't bore you. )
    It would be great if someone could give me some advise.
    Thanks,
    David.
    Attachments:
    can-daq-rtsi.zip ‏162 KB

  • PCMCIA CAN and MAX Bus Monitor

    I have a series 1 PCMCIA CAN Controller Card (184272F-01) and Series 1 CAN Cable (184354B-01) attempt to communicate with a DDC RPC CAN Interface (29bit arbitration ID, 250K Baud)
    Command:  Version ID?: 0000 0000 0000 001B
    29bit ArbID: 0x18EFE3E1
    1-First does MAX actually wrap the remainder of the Full CAN message, for example the CRC checksum?
    2-Can I run the Bus Monitor and send out the message with Test Panel at the same time? 
    thanks in advance,
    JS

    1. Yes it does.
    2. Yes you can.
    Have Fun.
    DirkW

  • Can I Use Bus-Powered USB Drive

    Hi.
    I have a La Cie ("All Terrain") USB hard drive that I normally connect directly to my G5 Quad's USB ports. It draws its power off the bus.
    However, I'd like to use it with my Airport Extreme as a network-shared drive. Does anyone know with certainty whether the AE can supply the necessary power to the USB drive, or will I have to get a separate Transformer/Adapter for this USB drive. Also, am I taking any chances on harming the AE if I give it a try?

    I have a WD Passport 250GB USB powered drive that works fine. I use it to stream video to my iMac. I also have a WD MyBook 1TB w/ external power that works fine for storage but is too slow for streaming.

  • Can people write comments on iweb site, can people write comments on iweb site

    i want to set up a web site.... can people who view the web site type comments ?

    Unless you are publishing to MobileMe you need to add that feature...
    http://www.iwebformusicians.com/iWeb/Comments-Password-Protect.html
    "I may receive some form of compensation, financial or otherwise, from my recommendation or link."

  • Comment ouvrir un PDF protégé par un mot de passe dans AIR?

    Bonjour,
    comme indiqué dans le titre, j'aimerai pouvoir ouvrir un fichier PDF (local) protégé par un mot de passe dans AIR, de manière à ce que çà soit transparent pour l'utilisateur.
    J'utilise actuellement le composant HTML pour afficher le PDF en lui passant l'url locale, mais aucun paramètrage d'affichage n'est disponible... Peut-être avez-vous une solution? Merci

    Salut,
    Que veut dire "protégé par un mot de passe" ?
    Mot de passe à l'ouverture ou mot de passe de restriction d'utilisation ?

Maybe you are looking for