Acquisition of data reading too fast in the loop For

I am trying to characterize a system with a VI that sets the speed of a motor, waits 7 seconds go upward, then take 200 readings calculates their.  The sampling frequency is 20 Hz, with 200 samples, it should take 10 seconds.  The program then loops through another iteration, sets the speed of the motor using the next value and the process repeates.

Although the first iteration works well, for some reason, something goes wrong in all iterations after that, because you have to read for only 2 or 3 seconds instead of the 10 that she should take.  I don't know if it's some kind of memory problem or maybe something else.  VI is attached.  Thank you!

That would be because you are using the acquisition mode = "continued acquiition" not "N sample (on request)" so while you wait seven seconds you take samples

Tags: NI Software

Similar Questions

  • Reading too fast: Please help!

    Hi all

    I used Adobe Audition 1.5 for many years (I have also tried with version 3, but my computer is too slow to run it well) and has recently purchased a new computer and thought I would update to CS5.5.  I recently recorded a session with an ensemble of 8 musicians and I have a major problem that I can not understand!  I recorded the sessions and while listening to them on that day, I recorded, all sounded very good.  The next day when I opened the sessions all of them played back too fast.  The music is a semitone too high in height.  I'm completely baffled as to why it happened, but I'm guessing it has something to do with the sampling rate.

    I'm on a PC running Windows 7 Ultimate (64 bit).  I use a Presonus Firepod as my audio interface that I set to 48 kHz.  My Adobe Audition sessions can also be programmed to 48 kHz.  I did something unusual that set again the paths of files of sessions in a more coherent system of record.  It opens everythihng always fine, but sessions are replaying at too high a pitch.  If someone could help me with suggestions, I would be very grateful.  I have a lot of people waiting for mixdowns for this one and I'm in a bit of panic!

    see you soon,

    Adam

    I checked all the samples used in the session already and they are ID'ed as 48 k.  The multitrack session, it also suggests reading is at 48 k.  Do you think I should try to re - sample all the files at 44.1?  I'm afraid to do it, because I tried to do it with a .wav file that does not need, and CS5.5 does not allow me to cancel it!

    You can just stamp the header without resampling.   It will not be reduced the audio because it does not change any of the headers.   Take one of the files and use the change > interpret Sample Rate order on this subject:

    However, you can actually set this operation on all files by saving a favorite.

    If all the clips in the session starts in the same exact spot, you can cheat the session as well be simply change the header in the file SESX (using a text editor).  However, if you already have automation or several clips from different places, it becomes a little more difficult.  But if everything started at the beginning of the session, it should be easy change this attribute in the SESX:

    I found another disproportion which may help a solution.  Wave files are 24 bits, but the multitrack session is set to 32-bit mix: would this affect reading?

    No they won't make a difference, and is in fact to design.  Given that you have saved the files directly on the disk in the multitrack, there is no reason to store in a file with a depth of greater than 24 - bit because your sound card is _actually_ be able to produce data at a resolution (in or) more than 24 bits.

  • iPhone battery drains too fast since the last update! Please fix this

    MY battery life drains too fast since the last update. Use to be able to use my phone all day and have more than 50% at the end of day. Now I can't do half a day yet. And that's just since the last update

    Hello JasonV!

    I definitely want to get the most out of the battery of my iPhone, considering how much I use and depend on.  We can certainly check a few settings.

    First of all, check out this article to see if there are any apps or processes that use more battery than expected: on the use of the battery on your iPhone, iPad and iPod touch - Apple Support

    Then see that all of your settings are configured as this guide recommends: Batteries - maximize Performance - Apple

    Once those who are defined, give it a try with the settings and let us know which applications use the most power and the percentage.

    See you soon!

  • Cannot read every value of the loop iteration for

    Hiiii...

    I developed a front-end which reads the values of serial port and display on the front panel.

    16 channels, which is a string data value. I've separated this string to read the data of each channel, but at the end of the loop for, I can read data only one channel for an iteration, and also I have to store each value iteration in a text file.

    I'm new to labview. Help, please. I have LabVIEW 8.0.

    Attached is my application code.

    This seems quite inefficient. Why don't you use a business structure? Why don't post it your code.

    In regards to the original code, you try to run by using the run continuously? I ask because I do not see a global loop, so it was not clear whether this was intended to present itself as a simple Subvi or "on-demand". If it's supposed to run continuously until you stop, DO NOT USE CONTINUOUSLY RUN it BUTTON. Use a while loop in your VI. Do not forget to place the initialization and close outside of the loop - you don't need to initialize and close the serial port whenever you loop around.

  • Value of the loop 'For' pass before the complete loop - FPGA

    Hello

    8.5 LV, LV FPGA, PCI 7831-R FPGA Board

    I got a cramp of brain on this one.  I have a function (Arb. GIS read) that Im using to generate an arbitrary signal which I created in memory.  I can't move to the value of data however.  I don't know why I can not, its because it is nested in a "loop For" who runs indefinetly and updates only the value whenever it loops back to 'zero '.  Ideas quick and dirty on how to use this value as it is being updated in the loop in my hand vi?

    I've seen messages on the use of local variable 'Files' and property nodes, but I can not just give a sense the.  Maybe because it's FPGA, something is different/no supported?

    * My principal is 'control MicroMirror Arb. SP", look in the #4 case and the condition of"false. "

    The 'Sub - VI' is called 'Arb Sig read RevB', and I'm trying to pass the variable 'Data' to hand while the loop For always runs.

    Thank you!


  • Why this disable structure encapsulating the loop for that I'm falling?

    In the middle of coding and debugging I noticed something weird... now I'm just curious.

    Here is what happened (audio WARNING may be a bit much, fans of pumping in a warehouse im in...):

    https://www.YouTube.com/watch?v=vC9BKJ0CwmY

    I'm really just curious to know why this is happening - it seems that there is the note of "make sure wire you the error" fault behind the loop that the disable struc overlapped a bit...

    Why the struc disable that first, I dropped in this video did seize all of the loop?

    -pat

    You have this decoration of the label on your block diagram behind your loop For. When you put the new business structure, he captured this label which is outside the loop For. This forces the case structure to take the loop too, since it is the only way to recover the property node and label.

  • Table of path error 1430 in the loop for

    Hello!

    I have a problem with the 1430 error: path is empty or relative, which seems impossible. The thing is that I have a battery of indicators of path connected to the loop for (check the .jpg and there is no problem with writing to a file by using the paths of an array with the first and last index.) Others are not saved because of the error... to be honest, that all data paths are absolute. Record in the file of the idicator path is the work of a Subvi (merge data vi) but it is in a for loop because I need to make it available to multiple files. There is no error that occur with the work of Subvi to a path. The question is: what labview makes with the paths saved in a table between the loops? I have just run out of ideas so if someone had some time, I would really appreciate for all the tips and ideas.

    K.

    Hello again,

    If someone was interested in the happy ending: the solution is: 2 loops for. I think there must be something with the way that labview sends data between iterations. In any case - don't know how much exactly but works

    the floor is .jpg.

  • How to get the items on a loop at the same time during the execution of the loop for

    Hello

    I am a student. I would like to know how to get the outside loop counter values For in parallel so that the loop runs rather than obtaining the value finally outside the loop for future prospects for the answers.

    Thank you

    Frederick

    You already said yes, and you have said some of the different ways (registrants, locals, reference, queue, etc.). Since the information was provided to your request, the thread can be considered closed? If you want details about how to implement something, you must provide the details on what you are doing.

  • Cannot use Select inside the loop For inside the SCTL (FPGA) - Bug? An alternative?

    When I put a Select statement inside a loop in a loop of Timed Cycle in LabVIEW FPGA, I get the following error when I try to compile:

    "An internal software error occurred. Please contact National Instruments technical support on ni.com/support with the following information:

    Error-61003 occurred at

    Possible reasons:

    LabVIEW FPGA: you cannot include this function in a loop For when the loop is within a single cycle timed loop. »

    I didn't know that whatever it is documented that says that this is not allowed; is this a bug or am I missing some documents?

    The code that causes this error looks like this, inside a SCTL (ignore Boolean wire wandering behind the loop for)

    I came up with the code below instead, which compiles into one Cycle timed loop, but it is a bit ugly. Does anyone have a better suggestion?

    This issue is currently followed under the CAR # 592391. Please keep an eye on our patches and new versions as usual!

  • Position of the loop For

    Hello

    I have auto indexed loop For (see attachment .vi).

    I would like to show the position of the loop For on the front panel. At the moment the position appears only at the end of each iteration of a loop. I would like to show the iteration of the loop (ie 1-6) at the beginning of each loop. How to do this please?

    Nevica

    Click right int-cable in a loop and create indicator.

    /Y

  • repeating nodes using loop but when XML string concating then concating only last iteration of the loop FOr?

    I stuck with a problem that I use FOR loop to generate expandable nodes.
    Now when I concat the node generated in the primary node and then I only last iteration of the loop FOR.
    can someone suggest me a way to manage this error...
    BECAUSE me IN 1.pl_phone_tab. County
    LOOP
    SELECT xmlelement ("phone"
    , xmlelement ("PHONETYPE", xmlattributes ('01' AS "dmnADRP_PHONETYPE"), pl_phone_tab (i) .p_phtype_tab)
    , xmlelement ("PHONENUM", pl_phone_tab (i) .p_phnum_tab)
    , xmlelement ("PRIMARY_CONTACT", pl_phone_tab (i) .p_prcon_tab)
    )
    IN p_phone_xml
    DOUBLE; END LOOP;
    SELECT xmlelement ("PhoneInfo"
    xmlconcat (p_phone_xml))
    IN p_phone_info_xml
    DOUBLE;
    Here, I'm a single node, but there must be two nodes for node of PHONE
  • Acquisition of data reading zero intermittently

    I use 3 analog inputs of an acquisition of data USB-6009 to monitor and record the temperatures of my system.  This running VI constantly perform 1 read per second and periodically saving the values drop.  Everything works very well for a few weeks or even months, until that data acquisition shows suddenly have a value of zero.  unpluging the acquisition of data and by him plugging back in solves the problem.  Therefore, I assume that this is due to the DAQ or maybe the USB communication being refreshed power cycle that I get the correct values again.  Any ideas on how to test for the cause of this problem or preventive measures, can I take?

    I was the closing of thought and could help restore communication at the end of each day.

    Oh, and I'm using LabVIEW 2010 on Windows 7.

    Disable the 'power save feature' Windows 7 where it randomly disables your USB hub.  Go to Device Manager and go to USB hubs then the power settings.

  • Problems with speed reading (too fast) in Premiere Pro (files imported from Nikon D4S and D810)

    Hello. I installed first Pro CC and I imported video files of my cameras Nikon D4s and D810. During playback, the speed is too fast, and I don't understand a word because of the speed. Why is this? The program misinterprets the fps rate? I tried to change the speed with SHIFT + j or l, but speed of basis for the clips are simply not true. Someone at - it advice for a frustrated new user of this program? It wasn't a problem with Premiere Elements or Finalcut.

    and look in the settings of the audio hardware of first

  • Audio loss. UAA Bus Driver reads Windows cannot load the driver for this hardware device. The driver may be corrupted or missing. (Code 39). All the patches?

    Audio loss.  Device Manager indicates Microsoft UAA Bus Driver as: "Windows cannot load the driver for this hardware device. The driver may be corrupted or missing. (Code 39) ».  Tried to update driver and restore without success.  Tried the program of "Fix - It", which has identified an error with the sound system, but said that he could not fix it.  Restored to an earlier date but still what system did not go.  Tried to uninstall and reinstall the driver.  Uninstall was successful but reinstall it read that the hdaubus file does not exist.  I'm a computer dunce.  Any help out there?

    Hi BarbaraWolfe,
     

    There are many causes of Code 39 errors:

    • A required device driver is missing.
    • A required binary file is corrupted.
    • There is a problem with the file I/O process.
    • A driver that refers to an entry point in another binary file cannot load.
    Re-install the driver by downloading it from the link given:
     
    Additional reference on:
    Check if that helps.
  • unusual warm-up and drainage of battery fast after the update for sierra

    everyone knows unusual warm up their MacBook pro and the draining of battery faster after the update to Mac OS sierra?

    my MacBook 2015 mid pro gets hot when I close the screen and put it to sleep, as well as drainage of battery faster than usual. everyone knows the same?

    Try to use the activity monitor to see where will your battery life.

    1. go to the docking station
    2. Click on finder
    3. Click the menu go
    4. Choose utility
    5. Double-click activity monitor
    6. Click the stack tab

    See you using your battery?

Maybe you are looking for

  • How to save the pages that I open in a single window as a tab group?

    In Internet Explorer, I am able to "Add current tabs to Favorites" for all my pages are saved as a tab group. How do I do this in Firefox?

  • Drivers for Satellite C55-A-1RG are not available for download

    All the links ofhttp://www.Toshiba.com.ro/innovation/JSP/supportMyProduct.do?LNG=27&service=sefor drivers for this model are not available. They all give 404 error trying to download. No idea where you can get these drivers as it is the laptop is a b

  • update reminders

    Is it possible to stop these annoying upgrade and update of reminders to appear in the upper right of your screen?

  • Excel sheet entry to 'setpoint' of the PID controller

    Hello I use this (attached) vi to control the thermostat of Lakeshore. I got the website vi OR. I want to change the vi as to the set value, it takes as input an excel sheet (could be any other form too). This spreadsheet contains a list of temperatu

  • Error 80070070

    Microsoft has sent the error message and announced 80070070 eror message what can I do about it