data update rate

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  I'm reading the data (speed rate and flow) of a table and it plot in a graph. I need to draw two values of l/min (speed) to the same speed. How can I do using a loop for?

  There is no need actually to use a loop FOR this. And using a graphic waveform isn't the type of field for this, for a waveform you a (Start), the dT T0 (greatness not) and table D (Data), this isn't what you want unless you know precisely the measure will take place according to an orderly disposal, you'd want a xy chart so that you can trace the measures where they occur in the axes X and Y of preference.

  

• PCI-6733 update rate problems

  I find that the use of the PCI-6733 for 8 channels of output update rate should not exceed about 550 000 even if the cards say 740 000.

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  I'm using labview 7.0 which requires a driver NI DAQ 8.1, not later. I think for example to 6 channels that a 1 ms pulse can make a rate of 1 to 1000 points but to 2ms, it can only make 670 k rate with 1340 points and a 3ms pulse can go no more than 560 k rate in 1680 points.

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• graphics update rate

  Hello

  I would create a vi containing a while loop, however I want the graphics data updated every second. Which is the right way to do it then?

  Thanks in advance

  I'm not sure I understand what you mean...

  Is your loop acquisition/generate data to more than 1 Hz?

  If so, I guess you want to update the chart only each iteration of loop of 10 or 100.

  Here's a quick example (documented in LV 8.6).

  I hope it helps

• USB 2.0 data transfer rate is very slow in Windows XP computer.

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  Hi MahendraSoni,

  1A USB 2.0 works much earlier?

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• How do you speed up 5.8 to 7.2 disk data transfer rate?

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  On Thu, 20 Sep 2012 17:50:11 + 0000, FredKoerner wrote:

  In my rateing of expieriance of windows, all my scores void are 7.2 and 7.5, except my disk data transfer rate is 5.8. I would like to know what I do for all my partitions of sup of 7.2 to 7.5. Could someone tell me the secret to do that? Your answers will be greatly appreciated!

  Replace your hard drive by a faster, for example with an SSD.

  But in my opinion, you should ignore completely all windows
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• Quantum data update installer concurrent request never ends

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  Any help would be great!

  Hello

  If the patch is not available, please log an SR.

  You could also see if (Note: 339888,1 - how to manually install updates on Windows data Quantum) help.

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• Graphics update rate waveform

  Hello

  I have a request I'm two signals to measure voltage in and feeding these signals to the mask and limit test VI to check if the signals are at your fingertips.

  I want to have 1000 samples7sec (1 kHz sampling frequency). The software works well but the only problem is with graphical waveform updated. If I run the loop of producer with 1 ms, in the log file, I have 1000 samples/s, BUT I see nothing on the waveform table (the second graph on GUI). I mean, I do not see the tolerances and my i / p signal.

  When I run the loop of producer with 2 ms, I can see signals on form of wave, but in the log file table, I have 500 or lower than that of the samples/s. I tried to change the rate of smapling but without success.

  Any help would be appreciated.

  see the attached example VI

  1. with a continuous sampling, you do not want to set the size of buffer.  Just let him be the default (which is quite large).

  2. you really do not want a waiting in your loop of producer.  Instead, you must inform the DAQmx Read to read something like 100 samples.  Waiting for the upcoming data will limit your loop rates.

  3. your second table is actually a chart.  A graph has the whole story and shows exactly what you gave him changed.  So, if you were trying to get all of the samples every 1ms when you are sampling at 1 kHz, you get 1 sample buffer playing and only 1 sample will be on the chart, making it appear as there is nothing in the graph.  When you go to 2ms, you get 2 samples to appear on the chart.  So I think you want to replace it with a chart.

• What are the motherboard data transfer rate on a HP G60 - 243CL?

  I bought my laptop HP G60 - 243CL of Costco 3 years ago and continues to function perfectly. Since then I have maxed out the 320 Gig HARD drive. A few days ago, I transferred all my multimedia files of a terabyte of 1.5 external HDD. I also removed and uninstalled all the software that didn't come with the laptop pre-installed. I ran the Disk Cleaner to delete the temporary files... etc. I left pretty much the State of Out-Of-The-Box laptop... I also ran the Windows disk defragmentation application.  Although it has all updates from Windows Update. I doubt that the above mentioned is relevant to my question. The laptop came with two modules of RAM PC2-5300... a 1 Gig and 2 Gig. I replaced both with two sticks of modules/memory 2 GB PC2 - 6400. Other that this hardware upgrade, I've also upgraded to Windows 7 Ultimate edition 64-bit. Now, I am also considering upgrading to an SSD HARD drive. I have of course read/write speeds rise as SSD memory ability increases (depending on model)... for ex: there is a huge difference in the rate of data transfer speeds in a 32 Gig SSD compared to a 256 GB SSD. At least that's what I noticed. I want to install a Gig of CRUCIAL 512 or possibly a CRUCIAL 256 GB SSD. Read/write speeds are respectively of 500 MB/s and 260 MB/s, or 230 MB/sec and 190 MB/s (again, depending on the model). My question is noticed in the SUBJECT field. Can you please help me make a wise decision? I wish that more technical details as possible. Thanks... :-)

  This laptop is equipped with SATA I, which is 150Gbit/s. You will not reach the maximum speed of your SSD, but it will be much faster then your current old school disc spinner. An SSD will always exceed a normal HARD drive. In addition, you should see a bump in battery life as well.

  I hope this helps!
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• Synchronization of data from different sample of data acquisition rate

  I use a high RT 8135.  I'm sampling of signals from analog pressure thermocouples to 20 ms and 10 ms.  I use the stream network to transfer the data from the SMU on my host.  I would like to be able to synchronize the timestamps of all data to the 1ms sampling note and record in a file.

  Search in the file my sampling data 10ms end timestamp does not match the timestamp of 20ms, missing data... I know you have empty queues to get the rest data but is possible to interpolate any data to adapt a unique timestamp?

  Thank you!

  Hi aokada09,

  Looks like you are facing problems resulting from parallel execution two loops you have.  There is nothing necessarily bind the two loops together, so that each of them an iteration at the rates you specified, but are allowed to start each software (sort of random) dictates that they start.

  To get a solid synchronization, share a sample between the two measures clock, but run the sample clock at 100 Hz for 50 Hz for thermocouple measurement and pressure measurement.  You should be able to use shared inside the SMU chassis backplane clock.  This will be as close as possible to synchronize without using a card of timing.  The only real source of delay/tilt between readings at this point is the physical distance that must travel the clock signal. This will not lead to steep, but there will certainly be some (probably on the scale of the high-nanoseconds or microseconds bass).  This article gives more information about the synchronization and the sample clock:

  http://www.NI.com/white-paper/11369/en/

• myRIO data update

  Dear Sir.

  I have a confusion in VI that I joined. I want to import the data that I had had in myRIO. So I created a variable shared for factor of voltage, current, power. When I start excel VI the current value is updated as a ZERO in the excel worksheet.

  The other question is, whenever I run the final VI of the voltage and current values are continuously updated, when I stop the VI power factor values is updated. I first thought the reason behind this is the power factor is placed on everything in loop.even when I removed the while loop, the power factor value is displayed a zero and the same continuous continuous when I stopped the VI. I couldn't solve this problem Sir, so I ask for your help, please help me to tackle this gentleman of the error.

  Hi Swathik,

  The answer to your question as to why the updates of the power factor is only once because you have placed this flag outside the while loop (as you mentioned). The solution is not to remove the while loop, but put all the code you want to be updated / repeated several times in a single while loop, i.e.., if you want that all the calculations of factor of power and the parameters (P, Q, S, phi) to implement also each time and connected every time put it inside the while loop.

  Another thing, is the inappropriate use of shared variables. It must be very careful in implementing the same.

  It is much better to go forward with the architecture of consumers producer you can follow this link

  http://www.NI.com/white-paper/3023/en/

  The loop of the producer will keep generating the myRIO values, and the loop of consumer will record the data in the excel worksheet.

  See you soon,.

  Rolland

• Maximize the continuous digital data recording rate

  I'm trying to record digital data clocked outside large amounts quickly.  The data is only for post-processing.  What is the best way to get data from the port on the hard drive at the fastest possible pace?

  I connect using a PCIe 6537 B.  I log on 4, ports of 8 bits to 40,92 Mhz, so a rate of ~ 160MBytes per second.  I have two designs I've tried so far (a producer-consumer architecture and a DAQ.mx configure logging design).  Both models work if I connect only on two ports (effectively halfing the necessary flow) but fail to the width of 32 bits.

  My producer consumer architecture fails after about 30 seconds of recording successful message

  Error - 200613: Acquisition was stopped to avoid a crushing of the input buffer.

  My other DAQ.mx configures logging design fails quickly (~ 1 sec) with

  200361 error: Overflow memory on-board

  .

  I could be set it up incorrectly.  As I said, it works with 16-bit data width.  I don't know if the increase in the width of the data directly is the problem or if the increased flow to fail.

  I use this on a 3 GB ram windows xp using labview in 2012.  I have attached the vi of my two attempts and a picture of the DAQ.mx set the logging design.

  Well, I'd suggest the integrated PDM recording method would probably be you give best results, assuming that it works at all.  This record type opens a DMA channel of the material on the hard drive so it should not produce copies of useless data, which would probably be a producer consumer loop.

  I never tried logging TDMS without reading the data, a Read DAQmx should be used in the loop?  Your file contains TDMS data?

  The challenge of your hard drive?  It is a flat disk of laptop?  I recommend you test on a SSD, if possible, just to see.

  There are also properties to open up to a size of memory buffer.

  Start with one of the logging TDMS basic examples delivered with LabVIEW and work your way up from there.

• Analog LabVIEW myRIO data sampling rate

  I have been using the myRIO to acquire the audio input from a microphone.

  In LabView, I use the VI Express Analog Input to get the data.
  I wanted to know if there was a way to increase the sampling rate of the data of this VI, or any what VI to whom?

  Hi ykhali,

  Try to put the VI in a timed loop and set the loop to your sampling rate.

  Kind regards

• Another chart update rate issue (using a state machine)

  Hi all!

  I'm develiping a pilot for a new instrument.  I have the basics of work based on the vi tree tutorial.  Now, I'm creating a basic example.  I started by watching a tutorial of State machine (a soda dispenser).  I have 3 States, basically init/reading data/check buttons & writing. Everything works great, reading and display of data. I would now like to add a chart for one of the data (SAP in this case).  Try to implement the method using the loop counter.  Loop cycles at 100 ms for now updating in 5 seconds (later must be user input).

  So basically, I have a simple state machine that updates the values on the screen in a certain State.  I need these data at the top level for trace or possibly turning most of these (less graphic) in a self-contained vi.

  Anyway, I have a Boolean LED in the main loop that flashes every 5 seconds. So far so good.  Except that the graph updates apparently at random?  Put the prog in sleep mode and I have seen the updated table when the data has been read (inside the red box). He has every time.  I'm just creating a local variable inside the red zone...  I see sporadic updates in the charts, maybe 5-10 updates every 5 seconds.  What Miss me?  If I change the iterations of the loop to a faster number (e.g. 10 ms) graph updates like crazy (although the CASE is false).

  

  Hi Steven8R,

  The chart will update any update a fact local variable refers to the table.  If the chart should be updated each time the code in red box runs.

  The code you have in the structure of the business is not doing anything.  It's just whatever data, the graph contains the reading and writing in itself.

  Something you might try to do instead is wiring the output of the amp VI get directly to the table AMPS inside the 5 second delay of the case structure.  This will update the chart as the most recent data point every 5 seconds.  Is that what you want?

  Best,

• Data update of Windows default locations have changed. How can I fix it?

  I followed these instructions to rename the Windows Software Distribution folder and my updates started again.  Ran the Microsoft Fix - it tool after that, now it gives me this message by default Windows Update site data have changed.  Please get back to me as best as possible.

  Hello

  Follow the steps in th from this link:

  http://answers.Microsoft.com/en-us/Windows/Forum/windows_other-windows_update/change-default-location-of-Windows-updates/ca4f318c-712b-4344-9584-cf7d33d9e689