Mx data acquisition write Underflow

Similar Questions

• Write data to data acquisition in a .txt or .csv file

  Hello

  I want to write the DAQ data inot a file .csv or .txt, so I'll try to handle 'Write in a spreadsheet file', can cause I can record data in all formats. My concept is that data acquisition data will save in a file continuously when I press the button IT and when I press STOP button then it will ask the user to save the file.

  I have attached the file VI.

  But my problem is that every time he asks me a new file even if I put the file append as true.

  All of the suggestions.

  Thank you

  Chotan

  Try this

  

• TDMS write a comment in the middle of Data Acquisition

  Hello

  I am currently using TDMS for my data record. Currently I log data from a Keithley module via GPIB connector.

  Essentially, I want to save data in intervals and during the recording of data, I want to have a comment section where I can write the changes that have been made.

  It connects every minute and I want to add a comment in the minute 5 for example. What is the right way to apply it.

  Thank you

  I would use a loop that is dedicated to writing in the PDM file.  You can then send commands/data to this loop in a queue.  You could a single command to write your DAQ data and another for observational data.  I would connect all the data data acquisition in a group and observational data in a second group.  That will make your file much easier to understand.

• not able to write the data through data acquisition

  Hello

  In fact, I need to send a code word (text file) from the program matlab through my data acquisition (OR-USB-6215). my program (transmitter.vi [case structure: page2]) attached below has a problem to do the task. whenever I run the program it gives me an error like

  Error-200479 occurred at DAQmx start Task.vi:2

  Possible reasons:

  Measurements: Specified Operation cannot be performed during execution of the task.

  Task name: _unnamedTask<84>

  At the moment I don't see output in my oscilloscope. But, if I highlight my performance I observe my samples on the oscilloscope with the following error message

  200288 error has occurred in the DAQmx write (analog 1-d 1Chan NSamp DBL) .vi:3
  Possible reasons:

  Measurements: Attempted to write a sample beyond the final sample generated. The build is stopped, so the sample specified by the combination of the position and the offset is never available.

  Hi Raja,

  What I did is I moved the 'write DAQmx' outside the while loop. That made the VI in this case is read the file and passing it to a table, and then this table is formatted a waveform to be written to the data acquisition device.

  With respect to the way in which the data is read, I don't change anything, it was based on your original code. A good way to know if you write the correct data is to check the chart view in VI.

  So the question is, is the graphic display showing the good waveform?

  Best regards

  Faris

• Data acquisition in LabView for other suppliers DAQ cards that NEITHER

  Hello

  I am a beginner in LabView programming. I have a 32 channels base PCI card DAQ (i.e. PCI-1602 of the manufacturer, ICPDAS) and I want it to interface with Labview 8.5.

  So how cards DAQ in Labview 8.5, which are manufactured by other suppliers that NEITHER? Should I DAQmx (or some other driver) for that?

  What are the other drivers/components required to access of data PCI-1602 (device) of LabView 8.5 acquisition card?

  (1602-PCI card driver are installed in my win XP and dispalyed in Device Manager).

  Please provide some tutorial above mentioned the problem to interface.

  Please guide me in this regard. Thank you

  Waqar123 wrote:

  Hello

  I am a beginner in LabView programming. I have a 32 channels base PCI card DAQ (i.e. PCI-1602 of the manufacturer, ICPDAS) and I want it to interface with Labview 8.5.

  So how cards DAQ in Labview 8.5, which are manufactured by other suppliers that NEITHER? Should I DAQmx (or some other driver) for that? You will need the drivers from the manufacturer, of the Board of Directors.  In your case, "ICPDAS.

  What are the other drivers/components required to access of data PCI-1602 (device) of LabView 8.5 acquisition card? Same as above.

  (1602-PCI card driver are installed in my win XP and dispalyed in Device Manager). Ok.  Then take you care of my 2 answers above.

  Please provide some tutorial above mentioned the problem to interface. To learn more about LabVIEW, I suggest that you try to watch some of these tutorials.

  Please guide me in this regard. Thank you

  According to what you do with the DAQ cards, they can do the job however, from experience, there are some functions that I could achieve with the cards NOR that I couldn't with 3rd-party maufacturers.  This does not mean that this is your case. However, it is worth noting that it took me a while to understand why the code has worked with a single data acquisition card (NOR) but not another (Non-OR).

  The drivers that you have installed may or may not include examples and code in VI.  They may be DLL.  If this is the case, you can write LabVIEW "Wrappers" around these functions, as it will simplify your life.  If the drivers are in the form of DLLs, and there are no examples of LabvIEW or available VI, you must read on node library function call.

  R

• USB multi channel data acquisition

  I use the VI to arduino HC-06 bluettoth of data acquisition. I would like to acquire data multicahnnel

  Could you suggest me how to acquire multichannel data from USB? To do this, how I have to program the arduino?

  The crux of your property doesn't do anything since you not write anything.

  Why you set the number of bytes to read at 8? You send more than that. You should be able to set it to a high number, such as 1000. Why do you use a dbl for this control?

• Multichannel data acquisition and 2D signals

  Hello

  [Use of labview 2011 license academic with NI9234 and cDAQ-9178].

  I'm trying to read, display and record the signals from two isotronic accelerometers and a microphone at the same time for future signal analysis (FFT, etc.).   I wish to display data of vibration and noise signals in real-time at 44100 Hz sampling frequency and display a waveform of final sampling, which takes about 40 years.  I would like to then write the data to a file.

  The associated block diagram, attached vi.  I could view real-time each accelerometer and sound using iterations of the loop and split the signal.  Unfortunately I record three channels of data in a table unique 1 d-wave form.  It seems that the data is saved as iteration1 (ch0) .iteration1 (ch1) .iteration1 (ch2) .iteration2 (ch0) .iteration2 (ch1)... and so on.

  Although I could show all three signals separately in the waveform graph, but I prefer these data to save as table 2D-waveform (each channel in a separate column).

  I believe that this issue has been raised here (http://ni.lithium.com/t5/LabVIEW/Concatenate-2D-data/td-p/873409) unfortunately no solution has been proposed.  How can I record the signals of data acquisition in 2D waveform?

  Thank you.

  I think to represent vi attached a solution architecture producer consumer for the problem mentioned above.  Just thought I'd share to those who can live a similar situation that I had been faced.

• synchronize two loops for written tdms data acquisitions

  Hello

  I have two loops of different data acquisition. A slow acquisition of CAN (10 s/s) and an analog acquisition faster (30 samples taken at a frequency of 300 Hz), I need to synchronize these data for tdms writes for later analysis in DIAdem.

  My example and the result in the DIAdem channel list is attached.

  Thanks in advance!

  Magnus

  Magnus,

  for a professional solution, you do not want to synchronize the devices on a hardware level. Since the material CAN work differently to 'traditional' DAQ devices, there are important things to take care of.

  Please look in the viewfinder to LV example for the word "CAN". For example, you can choose the example 'several cards CAN and DAQmx map Wfm Input'.

  Norbert

• You can trigger through communication Modbus TCP/IP PLC data acquisition without using a loop for?

  Hello

  I am trying to contact a facility through a Modbus TCP/IP communication PLC. I'm new to this method, but the idea is that the installation will send the logical (Boolean) values 1 bit by ethernet to my workstation which read and then will begin data acquisition. Basically, I need a triger to come to my pc. I placed my vi inside a structure case T/F which will run according to the signal, it receives data acquisition. However, for it constantly waiting, I put this in a loop for. The works of vi, but playback signals sometimes lagging behind due to the loop for. If I take the loop out and just run labview permanently, it works perfectly, but I know that the option is only for debugging and should not be used. So my question is, is there a better way to wait for an incoming signal?

  Hello!

  Please note that the order of execution of the write operations on the shared variable 000002 is not determined.

  For example, nothing prevents this order of execution:

  (1) value false 000002

  (2) set to true 000002

  (3) execution of the loop

  In what concerns the delay, you might consider placing a waiting vi in the case of 'false', or the loop uses 100% of CPU if I'm not mistaken...

  Kind regards

  Marco

• Average data acquisition alternating window 25sec

  Hello

  I am relatively new to programming and LABVIEW and was hoping to get help.

  I am analyzing the retinal potential obtained in answer to Flash (ON and OFF) model 120 LEDS (simultaneously)

  The rate at which the LED on and OFF depends on a pulse of squares of 1 Hz and 5V amp (from the device).

  I use USB-6009 to convert analog signals.

  Data are collected for 50-100 scans (LEDs go ON and OFF), is - 25-50 s of data collection. Followed by a break (no data genuine collected) from 25 to 100 seconds, after which a new cycle/game data are collected for the next dry 25-50 and so on.   Sampling rate = 1000 Hz (1ms/point).

  My goal is to perform an average of data collected with the timestamp.  Display the waveform of flood and averaged over the waveform graph and write the data on average in an Excel with a time stamp.

  Attached is a diagram of what I expect, I need a direction to start and move forward.

  Help, please

  Thank you.

  Hi Lana89,

  Since this is a simple data acquisition task, you can go through the sample data acqusiition and move forward.

  Kind regards

  SrikrishnaNF

• Error in Data Acquisition

  Hello

  I use the DAQ assistant for data acquisition and display the data in a graphical indicator. My camera is 6221 PCI and DAQ card is CBS 6221.Now that my problem is after you run the program after that 3 - 4 times it starts to give me an error message which says as follows:

  "Attempted to read samples that are no longer available. The requested sample was already available, but has since been replaced.

  Increase in the size of buffer, most frequently the reading of data or by specifying a fixed number of samples to read instead of reading all available samples would correct the problem. »

  My acquisition mode is continuous and I'm giving samples to read a value 1000 (which I suppose than the size of buffer) and my sampling rate is 1kHz.Now if I change my samples to read a value of 10000 the chart becomes too noisy. And also at some point, the program crashes.

  I increased the sampling rate of 10K and my samples read had a value of 100, but still there was the error message.

  Any suggestion would be appreciated to eb.

  Thnaks

  Hello

  I was able to run this code without errors.  Your error is caused by this: map The DAQ is written samples to the RAM to the sampling frequency (1 K).  Your loop is pulling 100 sample chuncks.  If your loop can not read at least 1000 samples in a second, the buffer eventually replaces unread samples.  Your reference time loop to make sure that it is excuting at least 10 times per second.  Use execution of highlight to ensure that write measure filw VI is opening and closing properly.

  If you change the sampling frequency, you don't want to use the same samples to read as the sampling frequency. To read samples must always be less than the sampling frequency to allow faster than the card written loop data.  But the other stuff in the loop are causing which slows down the execution of the overal loop time, if she were to run frequently.  Make the samples to read about 80% of the sampling rate will give a good report.

• Treatment of LabVIEW data and high speed data acquisition C

  Hi all

  I am designing a data acquition VI high speed of 3 cards acquition of data at the maximum speed. Data cards are PCI 2517 Measurement Computing. The sampling frequency for each card is 1 M samples/second, if the total sample of M 3/second of three cards. Problem is the LabVIEW drivers and the screws provided by the provider works very well just for a single card at maximum speed, but does not support multiple cards at maximum speed. Their technical engineer advised me to write code in c#, C++ or VB.NET for this data acquition high speed. If I use C forever, I would like to use LabVIEW for processing of the acquired data to data acquisition. I came across a few examples that suggest the creation of dll C code and then calling it a LabVIEW. But those who have programs simple and none of them speak in C data acquisition. My questions are,

  1. is it possible to call a C data acquisition program high speed of labview and not work in any kind of present of buffer overflow?

  2 would it not simple best to use labwindows CVI?

  3. is there another alternative solution that I'm missing?

  I'll appreciate all the entries.

  Thank you!

  Nilesh-

  It's pretty easy.  Arguments for CINrun must match wiring.  You can wire your CIN function block and say LabView to generate the C interface code to begin.

  Here's my pairs for the ASIO audio project.

  All the best,

  Terry

• Unknown device named "PCI data acquisition" and signal processing controller in Device Manager

  Greetings,

  Yesterday, my brother, who was running Windows 8.1 Overview on his Asus S400CA Ultrabook fell on a big problem of the NTFS partition corruption that made it impossible to recover through the Refresh Utility Windows 8.1. Given the situation, my brother decided it was better to go back to Windows 8, I had to install Windows 8 on their PCs by using an external DVD drive with a Windows 8 x 64 installer I already buy plenty of detail. The computer never asked me for a product key that I have read is normal in Windows 8 PC now having these embedded in the motherboard. So far an installation smoothly, but he's going to be delicate in the part of pilot facilities. Before you remove the computer I went to the Asus website and did my best to find the specific drivers for my brother's computer and downloaded the key drivers, chipset, audio, intel graphics card, bluetooth, trackpad Wireless LAN, LAN and Asus and installed. I used Device Manager to check that the drivers have been installed and which did not exist. I was able to get most of the drivers installed properly, however, said the Device Manager miss me the pilot of "Data Acquisition and Signal Processing controller PCI. Unfortunately I go to Asus website to see that if I can find the driver however, I can't do this right now.
  Check the attached screenshots for visibility...
  
  
  I also tried to use Windows Update to see if he could find the correct driver and unfortunately it's a dead-end. Because of that I write in this forum to see if someone can point me in the right direction when it comes to this missing driver (and others) indicated in the Device Manager.
  One last thing that I would ask is if I can use a utility like DriverMax to find missing drivers or should I go and install it manually?
  Thank you very much in advance for any help on this matter.
   
  Original title: cannot find drivers for Asus S400CA Ultrabook PCI

  Hi Mike,.

  Please keep us updated on the status of the issue. Please do not hesitate to answer, in case you need help with Windows in the future.

  Good,

  ASUS technical support according to my brother was a bit of a dead end, so I went to another Google search and found the culprit. I was missing the following drivers of ASUS:
  • Intel® dynamic and thermal platform frame driver
  • ASUS Wireless remote control (a driver for you to enjoy the airplane mode (Wireless) On / Off)
  The first pilot took care of the Acquisition of ICP data and Signal Processing controller and all but one of the unknown devices. Finally, the other took care of the last unknown device in Device Manager.
  I never thought that ASUS would use this a strange name for their driver because these names are extremely misleading.
  Other than that, I can finally say with certainty that the computer of my brother is back in business, and I can call this comprehensive process of restoration of Windows 8.
  Thanks for any assistance to Zaki J, I appreciate much all advice through this process!

• HP laptop - 15-r224tx: PCI controller of Data Acquisition and processing for HP for laptop - 15-r224tx

  I get upgraded my laptop (HP for laptop - 15-r224tx) for Windows 10 but I can't find the driver for the controller of PCI Data Acquisition and Signal Processing. Please help me find the right one.

  Thank you!

  You are the very welcome.

  It is the latest version of the W10 driver for this card model... see if this solves the problem, if you have not already installed this driver.

  This package contains the installation package driver for the controller wireless LAN Realtek RTL8723BE/RTL8188EE in the laptop models running a supported operating system.

  File name: sp72517.exe

• PCI Data Acquisition and Signal Processing controller driver

  I installed win 8.1x64 on my HP Probook 450 G2, but miss me the driver of PCI Data Acquisition and Signal Processing controller.

  Can you please help?

  Thank you

  Leontina

  Hello:

  Please see if installing the Intel Chipset driver installs this device.

  https://Downloadcenter.Intel.com/Detail_Desc.aspx?DwnldID=20775 & lang = eng & ProdId = 816