Injured write task

Similar Questions

• Will be performing tasks VISA with a data acquisition (Dev1) in a VI block tasks with the second DAQ (Dev2) VISA in a second VI?

  Hi all

  I have two functional screw a loop a set of read and write tasks with device 1 (NI USB-6008).  The second loop a set of writing with device 2 (another NI USB-6008) tasks.  2 VI has a massively slower than VI 1 time scale, which means that it must run in a separate loop.  Otherwise, VI 2 was created by copying and modifying 1 VI and variable names actions with him (though not, for example, global variables).  The two screws are meant to run at the same time on the same PC.

  However, if VI 1 is running at the same time as VI 2, any read operations or in writing to 1 VI 1 device are executed - but the VISA read and write operations to a serial device work.  When VI 2, all VI 1 functions work fine.

  Although I configured channels for tasks using the GUI DAQmx, I execute tasks using reading DAQmx write commands and have correctly defined the task 'create' and 'stop the task' live out the beginning and the end of my loop, respectively.

  Does anyone have suggestions for what could be the cause?  My thoughts so far:

  a. maybe it's some conflicts in the names of variables in memory between the two screws?

  b. LabVIEW for some reason any cannot read and write two devices on two separate screws?

  should c. I avoid to use DAQmx to configure these tasks (a sort of memory)?

  I know I can make it work if I have all together in a single massive VI, but for my application, it is much easier and better to do them in two separate screws.

  Thank you in advance for your help!

  In case anyone wondered, I found the solution:

  When I copied the original code for a new VI, it turns out that the structures of loop timed in the new VI had the same object name in the delivery structure of LabVIEW as timed in the original VI loop structures.  This prevents effectively regardless of the VI was executed the second execution of the timed loop.  (The serial number read/write suite to work because he was in a different timed loop.)

  I found this error when I ran the VI in execution of highlight mode and noticed that the output of 'error' on the timed loop flashed.  When I plugged it on my error stream, I found error-808, which explains the above problem.

  I have it set by right-clicking on the timed loop, change to a while loop, then change to a timed loop and plug the broken wires.  LabVIEW gave the new timed loop object a new name, and all was well in the universe.

• Writing USB DAQ: Reading the data, analyze, analyzed data - does not

  I have Labview 2011 32 bits (without tools), on Windows 7.

  Material: Enclosure OR USB - 6251 DAQ board.  I use analog analog out.

  I'm trying to collect data (reading), analyze (like part or derivative) to a new waveform (or a data table)., then convert them this new waveform. As in this example:

  http://zone.NI.com/reference/en-XX/help/370466V-01/mxcncpts/hwtimedsimio/

  However, I don't have hardware timing.

  I tried a lot of things. Those who work temporarily, until the start to write task threw an error: http://i.imgur.com/as5ItdO.png

  Another who work temporarily, but it has a 7 second delay: http://i.imgur.com/VLbyZbo.png

  Ends up having this error: Warning 200015 occurred

  When writing to the buffer during a regeneration, the actual data generated may have alternated between the old and new data. In other words, while the pilot was replacing the old model of the buffer with the new model, the device could have generated some new data, while a part of the old data and then a part of the new data again.

  Reduce the sampling frequency, use a larger buffer or refer to the documentation on DAQmx write me for more information on other ways to avoid this warning.

  Can someone tell me what I'm missing?  It seems very simple.

  Thank you.

  Thank you for an update. Sorry I missed you use hardware USB DAQ and this is the reason why we see this error

  http://digital.NI.com/public.nsf/allkb/EC1968728E660B288625780700570D06?OpenDocument

  In general, when you receive errors like that they give you a pretty good idea on what is going on. Therefore, you can try to remove your task AO timming daqmx or try to set the size of the buffer.

  This might help

  http://digital.NI.com/public.nsf/allkb/E1E67695E76BA75B86256DB1004E9B07

• HP Thinpro: Can I create a rule task which will not reboot the workstation if the write filter is activated?

  I am trying to send a rule HPDM task that synchronizes the system clock to an NTP server every day at a specific time. With Scripture filter off it works fine, but with it enabled system restart to commit the filter. I don't want to restart (I'm fine with the change being lost during the next restart) but I do not see where to put this option. When you send a manual task, I can choose to send little matter the State of the write filter. Is it possible to do this for a rule task?

  Thank you

  Dave

  HPDM a global setting (default settings applied to the rule task and manual task) and the task parameter (the one you saw when you sent the job, applied to a manual task only) to work with tasks.

  You can find a global setting through tools-> Configuration-> task settings

  Please note: once you have changed the global setting, all tasks (include the manual task) will be default use this configuration unless you specify one in each task editor dialog box.

• Why do write can not be performed because the number of data channels does not match number of channels in the task.

  Possible reasons:

  Scripture cannot be performed because the number of data channels does not match number of channels in the task.

  When writing, provide data for all channels in the task. You can also change the task so that it contains the same number of channels as the written data.

  Number of job channels: 8
  Number of data channels: 1

  Lama says:

  The DAQmx vi writing gives me the error. If I run a single channel, isn't a problem. Multichannel gives me error.

  You are funny! Why tie yourself to work VI (single channel) instead of one that gives you errors (multichannel)?

  (If your car does not work, you bring car your wives to the mechanic, right!)

  What is the exact text in the multichannel 'physical channels' when you do the AO control?

  Lama says:

  I did a sequence to ensure that each function has been run in the correct order. Wouldn't a race condition.

  All you have to do is wire the 'start of task' error at the entrance of error of the DAQ assistant and then back to 'stop task' and things will run in order. Guaranteed! Think the stream! Everything else can run in parallel or the order is irrelevant.

  First convert the sequence stacked to a sequence of plate, remove the flat sequence and add the mentioned son. Now, do a "cleaning pattern.

  A when stacked with the inhabitants of the sequence is one of the worst construction you can possibly do. It makes the code difficult to follow, impossible to maintain, difficult to debug.

• I just want to write a document! As in Vista, he was Manager of the tasks where you have written letters and calendars?

  I want to write a document, and where is the tab assesories with Notepad and all these things? You know where the Start button and there is a long list of everything? Where is it?

  Hi Kendra if you want to use WordPad or Notepad, to just start screen type WordPad, Notepad and click on it, then WordPad or Notepad opens.

  On the start screen you can search for anything within windows 8, just type and see.

  I don't know what programs you had with Vista.

• HP50g equation writer

  I'm trying to reproduce the task of moving an algebraic of the display to the writer of the equation. The HP48s/sx was capable. I looked through all three PDF files that are provided on the CD with my calculator.

  I tried to copy some algebraic time in normal view, goes to the author of the equation, then stick but can't get that to work. Someone knows how to do this or there HP decided that was not a function that should be retained?

  Hello

  As you ar familiar with 48 s/SX, I assume you are using the 50g in RPN mode.

  With the equation in level 1 (low) battery, press down, money the equation should open automatically in Equation Editor.

  HTH

• Working on powerpoint slides with exciting write

  Hi people,

  Proud owner of a tablet with exciting write to little more than 1 month I am trying to gradually transfer most of the tasks that I perform to work on my Windows PC to my Tablet while I no longer need to carry this huge 17-inch screen when they travel!

  E-mail and note-taking are a blessing, but still have a major problem with powerpoint slides.

  Whether QuickOffice ot ThinkFree, I can't find a way to consolidate the multiple. PPT presentations into a single presentation using these Office Android apps.

  I tried Thinkfree support but their response was a joke :(

  All help much apreciated.
  See you soon

  Sorry mate but I put t know what assistance you expect exactly here in the forum.
  Android applications are not developed by the manufacturers of tablets.
  Some are preinstalled on the shelves, but most of them you will find in Google PlayStore and making the app is responsible for the functionality of the application and development.

  It seems that thinkfree mobile provides little other office applications:
  https://play.Google.com/store/apps/Developer?ID=ThinkFree%20Mobile&hl=en

  Also in the Google game shop, you will find other Android apps with office functionality and other features.
  Maybe you should check out and try the apps like OfficeSuite 7, Quickoffice Pro or Kingsoft Office

  I think that tablets are very useful devices supports lots of features and in different applications, you could do a good job, but my personal opinion the table will not replace a laptop completely.

• SMU 7857R FPGA and DAQ task

  I'm looking at the SMU 7857R.  I would use the 8 analog inputs and the FPGA to do some annalysisy and DIO based on the best data.  I was wondering if it is possible to also define a DAQ task so that all analog data will be made available to the host.  Using a data acquisition task would be easier for me to have to write code fpga for use a DMA fifo to send back data.

  Hi bcat!

  A data acquisition task is only for devices Data Acquisition product supported by driver DAQmx as X-, M-, S-, maps E-Series. The boards of the R series are only supported by the driver OR RIO.
  If you don't need pre-treatment on the FPGA so that you can distribute simple data through DMA on your host. If you are looking for an API for the comparable FPGA with the DAQmx API then please check the NI CompactRIO waveform reference library. You can also use the library for R Series boards.

• The use of DAQmxWriteDigitalScalarU32 for write channels share the same ports?

  Hello

  I have a USB-6509 and NOR-DAQmx installed 15.5.1. Using the ANSI c api.

  Is it possible to create several independent channels that use different lines of the same port?

  DAQmxCreateTask("",&th1)

  DAQmxCreateDOChan(th1,"Dev1/line0:4","",DAQmx_Val_ChanForAllLines)

  DAQmxStartTask (th1)

  DAQmxCreateTask("",&th2)

  DAQmxCreateDOChan(th2,"Dev1/line5:9","",DAQmx_Val_ChanForAllLines)

  DAQmxStartTask (th2)

  ....

  and repeat for the following strings:

  Dev1 / line0:4
  Dev1 / line5:9
  Dev1 / line10:14
  Dev1 / line15:19
  Dev1 / line24:28
  Dev1 / line29:33

  So I can use DAQmxWriteDigitalScalarU32 to write to each task independently?

  for example:

  DAQmxWriteDigitalScalarU32 (th1, 1, 10, 0 x 1, NULL)

  DAQmxWriteDigitalScalarU32 (th2, 1, 10, 0 x 2, NULL)

  DAQmxWriteDigitalScalarU32 (th3, 1, 10, 0 x 3, NULL)

  ...

  DAQmxWriteDigitalScalarU32 (th6, 1, 10, 0 x 6, NULL)

  These tasks will interfere with each other because they use the same port, but are assigned different lines?

  If this isn't the case, I bits to the data, if the task/channel does not start at the Px.0 line?

  Thank you!

  Yes, as long as you use the same line on different channels, they must not interfere with each other for this reason, you can create a channel by line if you wish

  The reference to using the DAQmxWriteDigitalScalarU32 function:
  "A sample of the integer unsigned 32-bit unique, wrote to a task that contains a single digital output channel. "Use this format for devices with up to 32 lines per port.

  http://zone.NI.com/reference/en-XX/help/370471AC-01/daqmxcfunc/daqmxwritedigitalscalaru32/

  So yes, the DAQmxWriteDigitalScalarU32 can write on each task independently

• same task much hardware DAQ

  Hello

  I have a lot of test set-up each containing a device USB-6501. I wrote patches for the test set-up #1. Then I duplicated the test set-up, tasks for DEV #1 and I now DEV #2 (new USB-6501). I know that I can write or copy new tasks, but this means that each test set-up must be used with its own program. Is there a way that a task can be used with the USB-6501 connected no matter who he is?

  Note: the reason for the reproduction is the production rate. I use labview 2012

  Thank you

  You can use the DAQmx API to search for the devices to see if they correspond to the device you want.  You will then need to set up your tasks using this device name.

  

• Explanation to Pause a task

  Hello guys,.

  Ich have a little problem to understand what happens when I stop a task.

  A little explanation of my program:

  I generate a signal over time. This means that I give the program of the amplitude, frequency and time how long signal must be performed (for example 10 minutes).

  In order to have a better time of calculation, I do the following. I initially generate a first sequence und write it in the buffer (quantity defined samples). Then I start the task.

  So now the samples is transferred from the buffer to the device. I wrote a callback function (int32 CVICALLBACK OnEveryNSamplesEvent (TaskHandle taskHandle, int32 everyNsamplesEventType, uInt32 nSamples, void * callbackData)) which generates the following pattern when the first batch set of samples are transferred to the device. This has the advantage that I can't calculate a very large table at the beginning of the program instead I calculate every time a part of it at the same time when the buffer is written to the device.

  Then and now to my question.
  I don't know what happens when I break the task (DAQmxStopTask (taskHandle)
  I tried and it has the function, I would have but is there the risk that my buffer can cause an overflow? Is the set of the program as the calculation in the background stand still when I break the task?

  (My theory is that, with DAQmxStartTask (taskHandle), I'm starting to transfer the samples of the buffer in the device. When I stop the task he doesn't transfer the samples more and then the calcualtion in the background also still stands)

  Hope someone can give me the right solution to the problem.

  Best regards

  Hello Fasching_K,

  What is the difference between the DAQmx stop VI and VI DAQmx of the clear task task?

  It is interesting here

  When you perform operations of analog output, you must write a buffer of data to the FIFO output before the intervention. Indeed, this will move the task to a State of 'reserved', before calling the DAQmx start task VI (who puts in the 'race'). When the task VI DAQmx Stop is called, it puts the State of the "race" to the "reserved", so any attempt to start the task with different values generates an error.

  In your case, you have stopped the task with this one stop also not write values in the buffer, so normally no overflow would take place.

• Task output analog multiples

  Hello

  I'm new to LabWindows, and now I have a question.

  I would like to generate the same signal on two analog outputs (SCB-68). My Code is this:

  /*********************************************/
  DAQmx Configure Code
  /*********************************************/
         
  Channel 1
  DAQmxCreateTask("",&taskHandleCH1);
  DAQmxCreateAOVoltageChan(taskHandleCH1,"Dev1/ao0","",-10.0,10.0,DAQmx_Val_Volts,NULL);
  DAQmxCfgSampClkTiming(taskHandleCH1,"",1000.0,DAQmx_Val_Rising,DAQmx_Val_ContSamps,1000);
              
  Channel 2
  DAQmxCreateTask("",&taskHandleCH2);
  DAQmxCreateAOVoltageChan (taskHandleCH2, ' Dev1/ao1', ' ',-10,0, 10.0, DAQmx_Val_Volts, NULL);
  DAQmxCfgSampClkTiming(taskHandleCH2,"",1000.0,DAQmx_Val_Rising,DAQmx_Val_ContSamps,1000);

  /*********************************************/
  DAQmx write code
  /*********************************************/
  Channel 1
  DAQmxWriteAnalogF64 (taskHandleCH1, totalPulseSizeCH1, 0, 10.0, DAQmx_Val_GroupByChannel,)
  PulsePatternCH1, NULL, NULL);
  Channel 2
  DAQmxWriteAnalogF64 (taskHandleCH2, totalPulseSizeCH2, 0, 10.0, DAQmx_Val_GroupByChannel,)
  PulsePatternCH2, NULL, NULL); * /

  /*********************************************/
  Starting code DAQmx
  /*********************************************/
  DAQmxStartTask (taskHandleCH1);
  DAQmxStartTask (taskHandleCH2);

  But the program did not run. I got the failure:

  NO MORTALS RUN - TIME ERROR: "Test.c", line 175, col 13, id 0 x thread 00001328: DAQmxWriteAnalogF64 function: (return is 50103 value [0xffff3c49]). The specified resource is reserved. The operation could not be performed as indicated. Task name: _unnamedTask<1> Code of State:-50103

  I think the default is 'DAQmx_Val_GroupByChannel', I mean that both write controls use the DAQmx_Val_GroupByChannel at the same time so I can't use the second write command because one uses alreay. But I don't know if it's okay.

  Can sombody help me please to solve the problem?

  Best regards

  It is correct to double the buffer and fill it with the appropriate model. DAQmx reads the buffer and splits between the channes trends according to the layout of data in DAQmxWriteAnalogF64 () setting. If this parameter is set to channel group, samples for a channel are stored consecutively, followed by samples for the following string and so on, as you did so far; If number of sweep of groups, the samples are stored interlaced, i.e. (assuming N and M samples per channel channels): Channel1Sample1, Channel2Sample1... ChannelNSample1, Channel1Sample2... ChannelNSample2... Channel1SampleM... ChannelNSampleM.

  If you want to have Different patterns on the channels, please fill the buffer with different data tables.

• Read and write simultaneously 9375

  Hello

  I have a map of cDAQ DIO 9375 on a slot 4 chassis USB. My question is the card can be configured to perform simultaneous reading and writing? All channel and task VI DAQmx want to read or write. My goal is to be able to use a digital output to trigger a WEAR and use one of the digital inputs to read an output of the object to measure. I know that I can start and stop digital tasks to perform my test, but I was wondering if I am missing the mark in some way.

  See you soon,.

  Emach

  Sorry, I made a mistake in my post original (I blame my lunch to distract me) when I did believe you could do a task timed by the material and a demand.  You can either make on request of materially call GOLD a tasks tasks in one sense.  This means that if you want to DI and DO, you need to use two modules or on demand.

• How can I set up a digital input task to read continuous samples?

  I am trying to create an exclusively digital task that will make digital readings at a rate timed by the material using a PCIe-6509. However, when I try to put the task timing as follows (which works on a PCIe-6509), I get the following error:

  Requested value is not supported for this property value. The value of the property may be invalid because it is in conflict with another property.

  Property: NationalInstruments.DAQmx.Timing.SampleTimingType

  Required value: NationalInstruments.DAQmx.SampleTimingType.SampleClock

  Possible values: NationalInstruments.DAQmx.SampleTimingType.OnDemand, NationalInstruments.DAQmx.SampleTimingType.ChangeDetection

  Task name: DigitalInputTask

  State code:-200077

  The relevant parts of my code are:

      public class DigitalInputReader: IDisposable
      {    
          public DigitalInputReader()
  
          {
  
              dataReadyHandler = new System.AsyncCallback (DataReadyEventHandler);
  
  daqmxTask = new DigitalInputTask();
  
              daqmxTask.Configure (Globals.NI);
  daqmxTask.Control (TaskAction.Verify);
  
              daqmxTask.Control (TaskAction.Commit);
  daqmxReader = new DigitalMultiChannelReader (daqmxTask.Stream);
  
          }
  public class DigitalInputTask: task
  
          {
  public DigitalInputTask(): {base ("DigitalInputTask")}
  public virtual void Configure (NiConfiguration niConfig)
  
          {
  
              <= niconfig.digitalinputs.count="" -="" 1;="">
  
              {
  
                  String physicalChannelName = niConfig.Device + "/ port" + niConfig.DigitalInputs [i]. Port.ToString () + "/ line" + niConfig.DigitalInputs [i]. Channel.ToString ();
  
                  String nameToAssignToChannel = niConfig.DigitalInputs [i]. Name;
  DIChannel ch is this. DIChannels.CreateChannel (physicalChannelName, nameToAssignToChannel, ChannelLineGrouping.OneChannelForEachLine);
  
                  c. InvertLines = niConfig.DigitalInputs [i]. InvertLines;
  
              }
  
              var signalSource = "";
  
              This. Timing.ConfigureSampleClock (signalSource, Globals.MachineSettings.SampleRate, SampleClockActiveEdge.Rising, SampleQuantityMode.ContinuousSamples);// Globals.MachineSettings.SamplesPerChannel);
  
          }
  
      }

  The last call to Task.Timing.ConfigureSampleClock, it's which throw errors.

  Of the options available, or SampleTimingType.OnDemand or NationalInstruments.DAQmx.SampleTimingType.ChangeDetection provide the same precisely timed calls that I am familiar with the analog input interruptions.

  How is it possible in a digital task?  I mean, it seems that I could set up another task to do call by material for the production of a clock signal and use the ChangeDetection synchronization mode, but this seems a bit complicated for what should be easy to do.  What Miss me?

  Update: I thought about it.  You cannot call ConfigureSampleClock when the digital input card is a device of 650 x, because these devices have any automated examples of clock.  They are configured to run in mode default finite samples.  You must make all sample synchronizing with these devices in the software.

  Be cautious, however, because the .NET timers ensure they put any faster than their scheduled interval.  In practice, they are usually 5 to 10 ms slow by tick.  This means that if you want to read samples every 100 ms by sample clock, you'd end up reading all 108 ms samples.  All counters based on the elapsed time and number of samples would be away after a few seconds of it.

  Instead, you must do one of four things: write a doggone driver that runs in ring 0 and interfaces with the PCIe card in the required interval (i.e. on NC, not you, in practice), tolerate the inclination of the clock, use a multimedia timer as an interruption audio or video that is more likely to respond to the correct interval, or , my solution, an accurate clock allows you to set the interval of the timer.  I wrote the following code to the timer:

  var CorrectiveStopwatch = new System.Diagnostics.Stopwatch();
  
  var CorrectedTimer = new System.Timers.Timer()
  
  {

  
  Interval = targetInterval,
  AutoReset = true,
  };
  CorrectedTimer.Elapsed += (o, e) =>
  {
  var actualMilliseconds =;

  Adjust the next tick so that it's accurate
  EG: Stopwatch says we're at 2015 ms, we should be at 2000 ms
  2000 + 100 - 2015 = 85 and should trigger at the right time
  var StopwatchCorrectedElapsedMilliseconds = newInterval +.
  targetInterval-
  CorrectiveStopwatch.ElapsedMilliseconds;

  If we're over 1 target interval too slow, trigger ASAP!
  <=>
  {
  NvelIntervalle = 1;
  }

  CorrectedTimer.Interval = NvelIntervalle;

  StopwatchCorrectedElapsedMilliseconds += targetInterval;
  };

  I hope this helps someone.