Read the counter timeout in synchronized to count-analog input

Similar Questions

• How to read the counter NI9411 using C API data?

  I use the API C of NOR-DAQmx to read the data of a cDAQ-9188

  I am able to read analog voltages and entered digital fine (NI9201 and NI375).

  Problems with counters (frequency of measure) (NI9411).

  I just get error "all or part of your samples are not yet acquired" after the timeout.

  My pseudo-source:

  DAQmxCreateTask ("", & taskHandle);
  DAQmxCreateCIFreqChan (taskHandle, "cDAQ9188-189E9F4Mod1/ctr0","", 1, 1000, DAQmx_Val_Hz, DAQmx_Val_Rising, DAQmx_Val_LowFreq1Ctr, 0.1, 1, NULL "");
  DAQmxCfgSampClkTiming (taskHandle, "pfi0", 5.0, DAQmx_Val_Rising, DAQmx_Val_ContSamps, 5);
  DAQmxStartTask (taskHandle);
  DAQmxReadCounterU32 (taskHandle, 5, 10.0, (uInt32 *) data, 5, & read, NULL);

  My device and any other names are correct?

  Thank you.

  Have you compared it against examples of api C?  I think that you have the option to install the examples when you install the daqmx drivers.

  If you have done this, and it looks the same then I would say you should try Troubleshooting If you produce any data at all.

  -Bear

• Using the DAQ USB-6009 meter and an analog input voltage at the same time.

  Hello

  Currently, I'm reading the two channels of voltage with the USB-6009. It happens that one of the channels is the output of a digital coder, and it would be much easier to use it directly to the PFIO entry that is defined as a counter. The problem I am facing right now, it's that I can't use the DAQ Assistant to use the analog voltage to a channel and the digital channel counter at the same time. Once I put the DAQ Assistant to read the input from analogue voltage, I won't be able to add analog inputs. And as I put the DAQ Assistant to use the PFIO as a counter, I can add more entries to read analog voltage is.

  I wonder if it is possible to solve this problem using the lower level data blocks? Another solution would be to read two channels in analog input voltage and that the use of Matlab to process data resulting from it, since I was not able to do the counting to work simultaneously with the acquisition in Labview to impulses.

  Hope you guys can help out me.

  Thanks in advance.

  Using a simple wizard of DAQ is incorrect. You need one to acquire analog inputs and one for the meter.

• Synchronize the clocks of 2 PCI cards for analog inputs with e/s digital reference

  I'm trying to synchronize the clocks of reference of 2 PCI cards so that the analog inputs are synchronized. However, my appilcation has also digtial e/s on two cards, and who apparently made the mistake DAQmxErrorResourcesInUseForRoute_Routing. This discussion describes a similar problem, but the solution was to just put the reference clock to the slave device, who had no other tasks running on it, so what mine does.

  Is there way I can synchronize the clocks of refernce without interfering with the digital I/o?

  Thank you!

  PS: My application is in C++.

  The reference clock is really a lower-level component that is shared by all resources on a given device.  All tasks on a given device must use the same reference clock.  So if you use DAQmxSetRefClkSrc for a task, you can use it to set the same value for your other tasks.

  Best regards

• the analog inputs with digital edge trigger

  I am currently triggering a readout with a digital trigger using a 0 - 5v as the digital source encoder.  I am running LV 8.2.1 DAQmx 9.0 and a PCI-6259.  I use a VI I wrote and which is very similar to 'Acq & chart voltage-Ext Clk.vi', and using the one-pulse encoder connected to PFI8 as the clock source for the sample clock vi.  The only major difference is using the channel of the Z-trigger as a software reset inside the While loop with the DAQmx reading.  Currently, the sample clock doesn't allow that either read the lower edge or an increase of PFI8, so I get a sample by one-pulse.

  I need to double the rate of analog playback for a given tree rpm and encode them, so I need to read on the fronts and edges of the one-pulse encoder.  The sample clock can be reconfigured for the detection of changes and still read the PFI8 port to increase and decrease as inputs of physical channel, or do I have to configure detection of modification of the task/digital input for a single line and use the "ChangeDetectionEvent" as the source for the sample clock HAVE? Detection of Timing/change DAQmx can still use the signal in PFI8, or should I use DI ports, and which ports are DI should I use?

  Thanks in advance!

  In fact P0.8 is.  I was looking at the pinout for the 6251, no 6259.  Sorry about that.

• How to read a counter value for the separation of the two edge before meter is stopped by the second edge (6602 Council)?

  I use a timer/counter with DAQmx 6602. I use the separation of two - available via DAQmx cash edge. Count between the two edges works properly, however I do not know how to read the value of the counter during the counting operation (i.e. after the first edge triggered the beginning of the count, but before the second edge triggered the end of the counting). I'll have to wait for the second goes off the edge of the end of the countdown until I can get a counter value. I need to be able to access the current value of the County during the count operation. This was possible in traditional DAQ. How can it be accomplished using DAQmx?

  Ah shoot - I was afraid that this might be the case (for what it's worth, my series of X returned intermediate values, but the material and the underlying driver are quite different)...

  You just need to take one measure at a time or you are buffer several measures of separation of the two edges at the same time?  So just to take one measure at a time, you can set a task of edges of count using the database internal time as the source using an arm start trigger (first edge) and a sample of clock (second Board) to work around the problem.

  Best regards

• Y at - it a messaging of iOS application that updates the counts unread for all folders?

  I went through a considerable amount of effort to organize my e-mail on iCloud in several folders, some nested, including using filters to Apple to sort my emails in these folders.  I was really surprised to see that the mail iOS app is not able to maintain unread accounts next to these folders.  I think that it is possible to declare as "Inbox", but in addition to the clutter of dozens of them, he "flattens" and resumes the structure unnecessarily. What I want is the the folder tree is as with the counts read next to them.  Parent folders contains the sum of the counts unread subfolders.   If any of you have used 'Claws Mail', you'll know exactly what I mean.

  What is happening is that the unread number is updated only when I visit the folder.  Visit dozens of folders at the same time, it is tedious and unacceptable.  I'm really curious to know what Apple had in mind when creating this filter mechanism without providing the counts unread next to the folders.  It really beats the screening point, and I get bored to see mail in due course.  I tried every setting I could find to the counties to operate without success.

  Is there any application to mail out there that can do this?

  A second problem with the filters of Apple on the iCloud is that iOS doesn't let you get to iCloud.com via Safari to manage your filters.  You use Chrome or non - iOS to connect to iCloud.com system.   I don't see why this is so.

  You can press and hold the icon Refresh (semicircular arrow) into the URL bar "Ask Site Desktop" will appear and then press that.

• How to reset the counter of DAQ

  I have a system such as X coordinates and Y and in moving my counter will increase, but when the system arrives in the precise coordinates, it must reset the counter (equal zero) that this will be the zero point.
  Attached is a picture to show how I read form pulse DAQ.

  Hi LVelozo,

  you really need to know how to use the shift registers.

  

• Function DAQmxRegisterEveryNSamplesEvent can be used for the counter input channels

  Hi all

  I have a request to count the number of digital pulses. I want to know the time of impulses coming which start from 1 and an increase in later, 4 as 1, 5, 9, 13... The time interval between each pulse is not a fixed value. So I tried to use DAQmxRegisterEveryNSamplesEvent and DAQmxCreateCICountEdgesChan functions. But afterI calls the DAQmxStartTask function, it has always failed.  The advice that I used is the NOR-PCIe-6320. Here's the part of my code.

  DAQmxErrChk (DAQmxCreateTask("",&m_taskhandle));
  DAQmxErrChk (DAQmxCreateCICountEdgesChan (m_taskhandle, "Dev1/ctr0", "", DAQmx_Val_Rising, 0, DAQmx_Val_CountUp "));
  DAQmxErrChk (DAQmxRegisterEveryNSamplesEvent (m_taskhandle, DAQmx_Val_Acquired_Into_Buffer, 4, 0, EveryNSamplesCallback, this));
  DAQmxErrChk (DAQmxStartTask (m_taskhandle));

  I don't know the reason. Can someone give me help. Thank you.

  Yang

  DAQmxRegisterEveryNSamplesEvent only works with the buffered in memory tasks.  That's what you should do anyway (if you want to use the callback or not):

  1. make your external signal the sample clock (DAQmxCfgSampClkTiming).

  2. use one of the basics of internal time as the source (DAQmxSetCICountEdgesTerm).

  Each sample you read will give the count in ticks of the time base.  Multiply the number by the base of your time period and you now have a timestamp.  Keep in mind the counter roll to 2 ^ 32 therefore account for this in your program.

  The recall is not necessary, but it is useful that you can make sure that you block your main thread until the samples are available.

  Best regards

• reset the counter - 6601

  Hello

  I use a Board 6601 and the C++ interface.

  My configuration:

  I'm counting permanently impulses, where I'm using a sample clock to get samples of each time the sample clock transitions from low to high.

  My problem:

  I would like to reset the meter every time the sample clock is down to the great transition, as I avoid all overhead (check the number of samples and by subtracting the previous current).

  I would be very grateful for some advice on this subject.

  see you soon

  Rolf N.

  Wouldn't be enough simply to define a measurement period task buffer?  You could designate the 5 kHz clock as a basis for your time and heart rate as a signal whose duration shall be measured.  You can set you care to respond to which edge of the heart rate signal, and the material would take care of resetting the number internally on each new benefit of heartbeat signal.  For an easier interpretation of the result, read the value of count U32 form and/or units value = "Ticks" in the configuration of the task.

  -Kevin P.

• The count of lines with several criteria

  Good day to all,

  I'm having a lot of problems to know how I would be able to count the number of ranks who wear the same exact combination of numbers.

  Here is an example:

  19	6	1	9	5	2
  6	3	7	3	12	9
  7	1	9	11	3	13
  7	1	9	11	3	13

  The last two rows are identical, so the results of the count should be '2' for these ranks - something like this:

  1

  1

  2

  2

  Any person affiliated with this?

  Help would be appreciated,

  Thank you

  Jonas

  Hi Jdevuyst,

  This is easily done with an additional column.

  

  Then use COUNTIF()

  

  These formulas are both filled to the bottom of the column.

  Quinn

• When the output of the counter, which means "implicit synchronization"?

  Hello

  I'm trying to generate a simple pulse train (as in This example).  But I want the EXTREMELY precise timing.  As accurate as possible given my device series X DAQmx.

  So I was wondering if someone could explain to me what means "implicit synchronization."  Is that mean that the counter will choose the 'best' timebase accordingly?

  Can I just force the counter to use the time base of 100 MHz reference to ensure that the time is as accurate as possible?

  When you specify the implicit synchronization, you say DAQmx to generate pulse train dictates when the meter should update its output rather than other mechanisms (such as the sample clock).  It is not related to specify what timebase counter must use as its source when generating.  DAQmx should choose a base of default time suitable for you, but you can explicitly set this via the property node of DAQmx channel-> counter output-> General Properties-> Timebase counter-> Source property.

  Hope that helps,

  Dan

• Outputs produced by the analog input job Retrig delay counter

  Hi all!

  First of all, I want to thank everyone on this forum who take the time to answer the questions, this forum has been invaluable to me.  I have a question about delays in adjustment to the pulse output of a counter, like what is described here.  My question is related to another, asked hereon the trigger of an analog signal and producing a pulse for each triggered event.  I have this job and can be seen in the attached vi.  Basically, now I'm able to produce a TTL pulse whenever my analog signal passes a predetermined threshold.  I have also documented the vi to my best understanding, if I have something wrong in the documentation, please let me know.

  In any case, now that I have a pulse at each outbreak, I would like to be able to adjust the delay of events so that the pulse is not produced until the period n/20 (n = 0, 1, 2,... (19) what I expect to see is a similar pulse train in 'fig. 2' in the article, where the white pulse is the counter pulse, and the pulse red would be the same as my analog signal.  So, for example, if I had a 281Hz signal, I want to produce a single pulse with a width defined by the user whenever my signal crosses a threshold (it's zero delay: 0/20); This part may be made using the vi attached to this subject.  Now I want to delay this impulse as to each trigger event, a pulse is not produced until 1/20 of the period, or 0,000178 seconds after the trigger.

  Looking at my vi, I think that if I change the output channel of the meter to 'CO Pulse Time' and then set the respective initial delay, time and little time, I can get delayed impulses mentioned in the article.  Correct me if I'm wrong, but I think that basically 'big time' controls the pulse width. 'initial period' is what controls how long to wait after the first trigger event is reached, before generating a pulse, but this applies only to the first impulse and not the rest; and finally 'small time' is the time to wait before the next pulse is created.

  Earlier today, when I use the CO Pulse Time option, it seemed to work properly for me to a certain degree.  At low frequencies the impulses seem to trigger to each event when the pulse width is set at 2.5% of the period.  When I tested at 281 Hz with a pulse width, 'big time' of 0,000089 sec and without anything wired for the 'initial delay' or 'small time', the impulses seem to ignore systematically each triggers 2... that tells me that something is wrong in my settings, rather than problems with the sample clock.  So I decided to connect '0' to 'small time', but then I got an error message indicating that some time may be less than a value (I forgot what the error message).  So I concluded that I must not understand what these terms mean.

  Sorry for the long explanation, but I really need help with this.  So let's say that the first set of data, I want to acquire is at zero delay, such as pulses are generated at each triggering event like how I have my VI now; so, for the next set of data I want pulses to generate 0,000178 seconds after the trigger threshold; so, for the data set third, I want to pulses to generate 0,000356 seconds after the trigger threshold; and so on... How should I do for this?  Thank you very much!

  Hello!

  Please post on the Forums OR! I think the main issue here is that you are sampling not fast enough to catch all of your high. So you set your high dry 0,000089. You will need to substantially increase the frequency of sampling in order to catch all these. Something around 25 k should do the trick.

  To the extent where using the time counter Pulse, you're totally on track. I think that the use that the delay will do the job.

  I hope this helps! Let me know!

• Keeping the count of how many times a case structure has been entered.

  I have a "Case" structure (when a button is pressed, it's "True case").

  I want to keep track of how many times the 'real deal' was seized.

  How can I do this?

  For this you need to have a shift register or a feedback node and take into account each time that the case of the case of structure runs the count will be increased to see the attached excerpt.

  

  Good luck

• How do the count meter or begin at different times

  Hello

  How to let the counter count time, that does not begin at the same time?

  This timing system is a system of sports timing for the canoeing competition, it must follow 6 competitor who starts at a different time.

  I have a problem, I have 6 counter in a VI that allows to follow 6 competitor, but it start counting at the same time, how him to account separately for each competitor?

  Do you guys know how to fix this?

  I'm really sorry for the mistake of downloading.

  Please note that my version doesn't have the 'Running 2', 'Running 3 "buttons.

  Hope everything is clear know.