synchronize two usb 6289 with a meter

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• synchronize two cDAQ Chassis with DAQmx 9188

  I try to sync analog entry tasks on two 9188 Chassis utilzing the build in the BNC (PFI 0 and 1) ports.  I also have digital entry spots on the chassis of the master, I want to synchronize. Have been referencing http://www.ni.com/tutorial/5376/en/ and examples, I am not sure I have it set up correctly.

  From the link above, I exported the SampleCLK to PFI0 and StartTrig to PFI1 on the chassis of the master.  I have two BNC cables routed between ports on the two chassis.  I put the trigger DAQmx start on the slave to the PFI1 source (this does not seem to do both tasks at the same time), I tried to adjust the pitch of the DAQmx (sample clock) of source PFI0, but it creates an error (requested sample clock source is not valid).

  I can get the application of test runs by seting the slave clock "OnboardClock" sample source  When I use this setting, the task two seem to start at the same time, but I don't think the slave chassis uses the master module sample clock and therefore might drift over time?

  I would like to know how to properly synchronize the two analog tasks.  I also want to synchronize digital tasks on the main frame with the analog task.

  Hello

  If you want to synchronize the two tasks, you share examples of clock and triggers via PFI lines. The only exception is that it is not currently possible to synchronize tasks between the chassis that use AI modules with delta-sigma a/d converters.

  Best regards

  Villanueva of the DSL.

• Synchronize two E-card with traditional DAQ series

  Hello

  I have a PCI-6052E and a PCI-6071E and I have a Matlab program that interacts with traditional hardware DAQ driver cards.

  It is possible to synchronize the two cards use RTSI or something? If so, what should I do in matlab to achieve?

  I'm a bit confused, because I don't know if this is only possible using DAQmx.

  Thank you!

  Hi zlyhere,

  Using DAQmx would definitely be the best choice.

  In terms of using C vs the Data Acquisition Toolbox for The MathWorks Inc. Matlab® Software, I would recommend the Toolbox for ease of use.  The MathWorks develops the Toolbox, so they must have documents on how the maps can be synchronized.

  If you find that you need more features, you can fall back to C.  Documentation is available at

  "" "" Start menu"all programs" National Instruments "NOR-DAQ" support textual Code ' using NOR-DAQmx C reference

  MATLAB® is a registered trademark of The MathWorks, Inc.

  See you soon!

• How can USB-6210 I synchronize two channels of ctr

  Hello

  I use LV 8.5.1 and NI USB-6210. A small application I want to generate two different impulses with synchronization but simple starting point. When I configure a task with two channels the second channel configured always starts a ms later. But, if I configure both channels in terms of frequency, they start synchronously.

  My idea is bad in general? The DAQmx part is fixed.

  Thanks in advance

  Hi there, too.

  the release of the finite pulse trains, to two meters for each task. Therefore, your application will be the first impulse using two output counters and then to exit the second impulse using the two counters.

  Like the USB-6210 don't not have outputs DIO correlated, you'll generate two infinite pulse trains (which can be started at the same time throug a trigger of arms) that you explicitly stop before the start of the second pulse (using the DAQmx abort task from a parallel loop), or upgrade your hardware at least a USB-622 x card series and a digital output model... Alternatively, you can use the PCI-6602 counter card and use a counter to Gate two others doing an infinite impulse train uses a relaxing break...

  Synchronization of two meter in NOR-DAQmx tasks
  http://digital.NI.com/public.nsf/allkb/BB7AE2D12BB04CBE862574FA005D3826?OpenDocument

  Using a counter to generate a redeclenchables Train digital pulses with a PCI-6602 and DAQmx
  http://digital.NI.com/public.nsf/allkb/4A9AF19480E50C6D862571B70058142A?OpenDocument

  Several counters on the same card with a single trigger pulse
  http://digital.NI.com/public.nsf/WebSearch/CE99A0B2A9048A2A86256C630062F550?OpenDocument

  Best regards
  Sebastian

• synchronize two exits of meter 6071E map

  Well, that's usually how to synchronize two problem of counters.

  I use the 6071E with DAQmx .NET 4.0. I set a task and attach to two channels with implicit synchronization and zero initial delay of meter output. When executing the program

  I catch the first edge with a single trigger to scope. There is always a delay between the first edge of ctr0 and the first edge of 16.3 microsecs ctr1. Is it possible, not to mention that affecting the initial delay of ctr0 16.3 microsecs to make meter always start together? What is the source of the delay(software/hardware) and must always remain constant.

  any help is welcome

  The source of the delay is that while he is in the same tasks that the counters are always started sequentially by software.  I'm surprised that the delay you see is constant.

  If you want the counters to start together, you must configure a start trigger.  As soon as you begin the tasks of meter in the software, issue the trigger to start to generate your pulse output.  Relaxation of beginning must be a signal of material - for example, you can configure a digital outputs in software timing and the lead back to one of the PFI lines.

  If you want to avoid any additional wiring, you could split the counters in two separate tasks.  Trigger a counter with the internal performance of the other (start the task that will be triggered everything first).  In doing so, instead of using an external trigger, I expect a delay between the order of 100 ns counters as the initial delay is at least 2 timebase tick.

  Best regards

• first instance LR 6 cc import goes well with the various cards, that one card does not work, usb HDD with only images, map 9571 photos 115GB, sometimes only 300 photos, then wait all night nothing, try the separate subfolders, only two (including su subfo

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  Problem solved thanks to Matt: turns out the problem was the date being set to one day earlier. After recording a workout and wait 24 hours, they have appeared on the site W450 :-)

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  I'm reading the pulse signal of USB-Quad08 with Dasylab V10, but every time I got the error message "this Committee has no meter 9513.

  I have configured the jury with Instacal and the test hardware is ok. I used the module 'Entry meter' (Modules--> inputs / outputs--> MCC - DAQ--> Counter Input) to read the signal of the channel meter. "Entry 9513 counter" displayed and I na not change settings. After connecting a graphic recorder module I run the application. The error message appeared.

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• USB-6289 DAQmx delay early in the program

  Hello! Anyone help me with this problem.
  I have a new data acquisition is USB-6289.
  I'm only looking for I multiply by a decimal factor, after putting this result on AUG.
  for example
  AO0 ai0 * x =
  I want to do in continuous mode and in real time, with minimum delay. When I start the program, I have a time delay which varies.
  How can I measure this delay time?
  Anyone have an example of program to do (a simple multiplication in real time) and check where I have my mistakes.

  Thank you very much.
  Jonathan

  I put my program and a few cards of my oscilloscope (ai0-signal ao0 drop signal)

  Hi Jonathan.

  The code that you downloaded was not in parallel. Flat sequence structure forces the process to the AO HAVE to wait for the update panel. You can use the "Acquisition and recording of data" model to Create... Project for a reference on how to separate the update of the user interface of the real transformation.

  However, you must keep in mind that it is not possible to "simply to acquire a signal, multiply it and transmit" with DAQ hardware. This is because you must proceed as follows to get a signal and send it through the AO:

  1 acquire the signal in the DAQ card.

  2 send the signal to the computer via USB.

  3. ask the OS and LabVIEW process the signal to multiply.

  4. send the signal via USB in data acquisition.

  5. the output signal.

  This means that, while you can probably reduce the delay, you will always have this delay in the order of milliseconds. If you really need a shorter delay, you have a few options:

  (1) I noticed that the signal you're reading seems to be periodic. If it is a periodic signal, you can enable the regeneration in the AO and drastically reduce the delay, like the acquisition of data will just get the waveform periodical and cycle it. However, if the waveform changes, you will have some glitching.

  (2) use a multiplier circuit separated instead of data acquisition.

  (3) use a FPGA or RIO device instead of data acquisition.

  I hope this helps.