Synchronization of measurement DI/O with 5 analog in separate lines of various modules mounted on a NIcDAQ-9178

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• Synchronization of two inputs frequency meter with several analog inputs

  Hi all

  I'm relatively new to LabVIEW and I'm trying to collect data from multiple sources with calendar sync on the acquisition, but I can't understand. My problem is that I have two inputs frequency meter, an optical tachometer reading one pulse per revolution and a max flow meter machines with a 12000 k coefficient. I can't find a way to synchronize the calendar with my multiple analog inputs. I tried to first get the speedometer to synchronize with the analog inputs following the example linked here. (https://decibel.ni.com/content/docs/DOC-10785) So far every time I run it I get an error on the DAQmx read timeout or an error "several sample clock pulses have been detected" (see image).  It seems if I slow the way to down to say 10 hz and make sampling rate ensure that the tachometer signal is more than 800-1000 rpm (13-17 Hz) before starting the VI then the program will run without error until the ROTATION speed is below this threshold, then the "sample Multiple clock pulses" error occurs.  The code is attached below.

  Does anyone know of a better way to synchronize the entries of frequency of the counter with analog inputs?  I would like to have a VI that can display 0 RPM (and possibly 0 flow as well, but I think I need to understand the timing of a meter before I have add another, because it seems that I can't have two counters to the same task). Any help on this would be greatly appreciated.

  LabVIEW version 13.0

  Chassis cDAQ-9178 with NI 9401 for both counter inputs and NI 9205 for the analog inputs.

  Thank you!

  Richard

  I know the error requires to restart the task at least (this particular error puts the material in a State that cannot be recovered from during execution of the task - I've been down this road before) but I'm surprised that you would have to delete and re-create the task altogether.  And then I had to do this to workaround other questions in the past.  It is awkward and should be considered a bug, if this is indeed the behavior.

  Honestly, regardless of this bug, the way the material dealing with the situation of several sample clock edges makes measures of sampling frequency clocked essentially unusable for purposes of synchronization (in my opinion anyway) If you encounter a more slow than your sample clock rate.  You are supposed to be "synchronization" of the measure, but it really no longer applies if you have to restart the task over and over again (if you must delete it or not).

  Workarounds can get kind of creation (which isn't really a good thing).  For example, you can configure a measure of implicit frequency to keep a buffer of frequencies and use a leader board task (source is the frequency signal, sample clock is the sample clock HAVE) to establish a correlation between the index of your buffer of frequency for singing HAVE sample clock.

  Best regards

• How to synchronize a DSA Board (4496) with several S-series (6143) tips for PXI?

  I need to set up a data system that will require the measure to phase for accelerometers-locking and dynamic deformation signals.  How to synchronize my PXI-4496 Council with my PXI - 6143 s?

  I forgot that some DSA properties does not directly on the devices of the series S I have been able to find an article in the knowledge base that has addressed your specific issue.

  Synchronization Dynamic Signal Acquisition (DSA) with NOR-DAQmx products, this includes an example program synchronization a DSA device and MIO device to sample at the same pace.

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  Can someone please show me how?

  Thank you very much

  Best regards

  Hello

  Thanks for posting your question on the forum of National Instruments.

  Unfortunately, you can't have a RTD (generally with a PT100 probe) measure on a module 9211.

  9211 module is dedicated to the use of thermocouples.

  I suggest that you use a 9217 or 9219 rather (more information here).

  I hope this answer will help you.

  Best regards

• Error blackBerry software - synchronization failed, impossible to deal with organizing data

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  UPDATE: I spent 4 hours on the phone and the remote session with the help of Blackberry last night.  After doing some troubleshooting to isolate the problem, determined that something on the device caused the problem of Outlook synchronization. One thing I've learned, it's that it can take a long time to synchronize and even though the progress of the screen may appear frozen, let it go until the end - sometimes it took 20-25 minutes, but eventually completed. Here's the process we went through - I would recommend appellant help BB and work with them to make sure you have not accidentally delete Outlook contacts and calendar of important information of your PC or BB device!.

  (1) we tried an uninstall/reinstall the PC Link BB software and that did not fix the problem.

  (2) to isolate the problem of synchronization.  We first did a synchronization of 2 channels 'contacts' and 'calendar' and who was a failure.  Then did a synchronization of only 2 channels 'contacts' and managed.  Then did a synchronization of only 2-way 'calendar' and that was a failure - so the problem was linked to calendar data and something on the device has been the cause of the problem or corrupted.

  (3) link BB allowing us to make a backup complete unit.

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  (5) has the 'Security Wipe' feature (on the device, the settings > Security and privacy > wipe security) and phone rebooted without problems (takes a while to do).
  

  (6) then used link BB to do a sync test 1 channel 'contacts and calendar' from PC to device.  It worked without problem.

  (7) we then used BB link do a "restore" full backup of device, as we did in step 3 above.  It takes a while to make and was a success.

  (8) once the restoration of the aircraft was complete, BB link configured to perform a synchronization of 2 channels of the two 'contacts' and 'calendar '.  Does the synchronization and was a success.  Did a test by adding the new entry of the calendar on PC and did another 2-way sync - all worked very well.  Seems that the problem has been corrected, but will follow in the coming days.

  Lessons learned:

  (1) If you have a lot of Outlook contacts and calendar entries, the synchronization may take a long time.  Be patient and let it run - even if it seems stuck, etc!

  (2) save all Outlook data on the device and the PC to make sure that you have a backup something bad happened during troubleshooting.  We had not something bad happens, but I was gald we made a backup anyway.

  (2) call BB help - support person, I worked with was fabulous, even if it took some time to work through a patch.

   

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  Hi Maggiemoon,

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• Can I synchronize list XCP DAQ with my analog input data data?

  Hi all

  "I use ' ECU M & C" for measurement of a computer data using the XCP DAQ list. "The data is read at the sampling frequency I put in ' MC DAQ initialize.vi. This works well.

  I want to associate this data with my DAQmx device measures. Is it possible to synchronize the clocks of the sample (by RTSI?) in the same way, it would be with DAQmx CAN synchronize data?

  Material: NO PCI-CAN/2 & OR PCI-6229.

  Thanks for any input.

  PJ

  Hi PJ,.

  Well, I think I understand now, I don't know why I DINA see this before. It is not possbile to do this with the ECU Measurement and Calibration Toolkit, sort of XCP DAQ, is not something that you are able to do.

  Best regards

• How to synchronize the device with an analog input device?

  Is it possible to synchronize a device (e.g. Basler scA640-70fm, IEEE 1394 b or NI 1722 smart camera) with an input device analog (for example, NI PCI/USB-6225 or NI PCI/USB-6255)?   For example, it is important to a video image of match with a sample of data digitized by the A/D converter.   In particular, it is important to know when the first video image starts compared to samples of digital data.   If it is possible to synchronize the camera with the A/D device, then then how is it?

  Thank you

  Ian

  Hello Robert,.

  Thank you for reference and information.

  Ian

• You can synchronize digital input with an analog input on a 6034e?

  Is there a way to synchronize the digital input and analog input on a 6043e?

  I tried the test application "SyncAI_ReadDigChan", but it fails during the humor tick Verify():

  "The requested value is not supported for this property value.

  Property: NationalInstruments.DAQmx.Timing.SampleTimingType

  You asked: NationalInstruments.DAQmx.SampleTimingType.SampleClock

  "You can select: NationalInstruments.DAQmx.SampleTimingType.OnDemand.

  I'm currently collecting analog input data for the duration of a digital input pulse.

  Thanks for any help.

  Joe

  No, you can't.

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• Measurement of low-cost input analog (4-20mA) with data acquisition

  Hello

  I would like to have a very low cost measurement system loop which I can plug in my laptop current:

  I have a load, which is connected to a circuit of air conditioning/signal booster, which output a 4-20mA. I want to measure this current loop signal.

  An idea for the lowest cost system? I think that the most NOR DAQ are too expensive and too exaggerated.

  I have LabVIEW.

  Use of remote sensing current low-value resistance, then measure the fall of voltage through it with the help of an acquisition of data 6008/6009?  They have about $150.

  You will probably need to amplify current-sense with a MAX4372 or similar resistance to achieve a result that allows you to use a reasonable scale on data acquisition.  I measure the current through our products in almost all of our equipment to test in this way.  The size of the resistance of meaning as a result.  The 6008 is accurate enough, but it is not the fastest nor well presented.  But starting at $ 150, they are hard to beat.

• measurement of current with usb-6009

  Hi, my name is hung and I am a student in electrical engineering... I'm doing a thesis that the project using Labview and acquisition of data NOR UBS-6009 to simulate the function generator, Oscilloscope, Digital Microsoft (DMM)... and now I'm simulating DMM. I managed to measure the voltage and resistance which i use voltage divider method, but I encountered a problem with the current measurement. The problem is the USB-6009 to measure use the current, it measures an incorrect value. I tried to use the current CQI 0-20mA Sample.vi example but it always measures an incorrect value. If NI USB-6009 supports for the measuring current? Is there a way to measure the currents using USB-6009? Please, help me. This thesis project is so important for me. Thank you.

  Hung,

  Since you are a student in electrical engineering, I'll show you how to know the answers to your questions.

  1. review the specifications for the USB-6009 case.  In particular look at the specifications of analog input.

  2. How would you measure current if you had only a voltmeter?  Use the same method with the USB-6009 case.  (Tip: apply the Ohm's law).

  General comment: when using any measuring instrument, always consider maximum permitted values at the entrances so that the instrument is not damaged

  and the measure is accurate.

  Let us know how you do.

  Lynn