NI9411

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

• NI9411 - logical counter?

  NI9411 - is there any logic to counter in the signal?

  If you use the 9411 with a CDAQ (the old version) and then using slots 5 or 6 will allow you to use the counters out of the chassis. If you use a CDAQ 2 (new version), then any location can be used as a counter. The 9411 itself does contain not all counters.

  Please let me know if I can help further.

• example code for NI9411

  Hello

  I'm looking for a simple example of code for NI9411 (FPGA code and the host). I searched in the examples that come with LabView but I have not achieved anything.

  Thanks in advance.

  Here is an example that you can use with the NOR-9411.  If you are looking for 9401 in the Finder for example of OR, you can also find other examples that were not written for the 9411 specifically, but you can modify it to work with her.

  Brandon Treece

  Technical sales engineer

  National Instruments

• How to connect incremental encoder to NI9411?

  Hello
   
  I need to connect an incremental encoder to a NOR-9411 digital input on a chassis cRIO module to use for high-speed triggering.  I'm having trouble to know how to connect the wires needed to the encoder until the 9411 correctly.

  The son of transport the following signals:
   
  A red
  B Green
  Z Brown
  + V blue
  OV-Orange

  I'm fairly inexperienced with the connection of the sensors to LabVIEW gear, then please let me know if I can provide more information on my installation.

  In addition, attached is the datasheet for the encoder.

  Thank you very much!

  Alex

  Hi Byrd,

  Thanks for the post and I hope that your well today.

  I'm afraid I'm not totally sure what is your problem.

  The NI 9411 manual can be found here: for additional reading.

  The manual explains how to connect unbalanced devices on the 9411.

  page 12:

  "An example of asymmetrical device is an asymmetrical encoder. Connect each of the encoder signals (phase A, phase B, and)
  the index) to one of the pins in a pair of pins of DI. Figure 5 shows the connections for an asymmetrical encoder. »

  In labVIEW, you can then create a DAQmx task to read all digital lines.

  Hope this helps to get started you,

• cDAQ material requires a supply reset after the release of VI.

  My LabVIEW program seems very simple. It uses two Express VI, an analog input (NI9219) and the entry of a meter (NI9411). The program works fine until I have stop. Then it will not start again unless the chassis cDAQ (NI9472?) is the power to bike. The program only is there and does nothing. When I reset the chassis and click the button run the program starts and works perfectly. The only part of the program, which is a little unusual, is that the entrance of counter refers to the sample in analog input (AI/SampleClock?) clock for synchronization.  Sample timing mode is 'continuous' for both modules. Why reset chassis doing all it works correctly? How can I eliminate this step?

  Try your JUDGMENT of wiring in the DAQ Assistant as well.  Tasks are implemented for continuous samples and are never actually loaded to stop.  I wonder if somehow that causes a buffer overflow error or something like that and is the cause of lock USB communication.  I would say it should not, but it would be interesting to try.

• Measurement error Freuqency

  Hello.

  I have a VI whose frequency records 4 channels for a NI9411 and generates a string of adjustment 0 - 5V. It works fine apart from when there is no siganl current frequency.

  When my rig is first turned on there is no current frequency signal and after about 10 seconds, I get the attached message.

  Is it possible to modify the Vi (attached) so I do not get this error in the future? I can't guarantee that it will always be a frequency signal.

  You can set the timeout to-1 in this way he'll wait forever.

• Error-50400 occurred to the Invoke method: FIFO. Read in Host.vi

  Hey there,

  We have sensors on an engine which are connected to a Board of Directors OR cRIO 9014 (with a NI9411 6 digital input modul channels) and from there, via the network to a host computer.

  cRIO jury: the jury cRIO collects data from the engine and stores in a buffer, it's because the network is to slow for the size of the data

  Host: bed of the host computer in the network buffer on the map of cRIO, on the host computer, it takes specific portions of the data to create charts of the engine pressure

  Error:

  Error-50400 occurred to the Invoke method: FIFO. Read in Host.vi

  Possible reasons:
  The transfer did not complete in the time-out or the specified number of retries.

  This error occurs in the following scenario:

  -motor is running

  -cRIO is running

  When I press the Start button (boolean 3) in the host.VI to start reading the data of the card AFTER I pressed the button to run the host VI.

  The error will not occur if I pressed the button start (3-Boolean) BEFORE I pressed the button to run the host VI.

  We tried to increase the timeout, but it still does not work, the error occurs!

  We would be really happy if you could look over it and help us in this case! If you need more information or if we need to clarify a specific part, please let us know!

  We have included the VI in the attachment!

  Thanks in advance!

  CHRISSE,

  There are a few things wrong in your application, if I can offer a few suggestions.

  First of all, your loops are not running in parallel.  In fact, they are in while loops with a real constant wired for them. I don't know if this is normal for debugging, or on accident.  I would put the question (read pulling elements Dummies) out of your hand while loop.

  Your second nested while that the loop (that of the poll the number of items and then shooting them) will execute only once and can make only a few samples.  I don't think that that's what you're looking for here, and there are two ways we can go here.  You might question continually until you have 0 items available for x time, then you know that you have no more available samples and you can process all the data, OR you can put your computer through this loop and always just write in the file immediately in the form x samples are drawn.

  In addition, the stop of the main loop condition is ( <= 3)="" therefore,="" it="" will="" run="" once="" and="" then="" stop. ="" maybe="" you="" mean="">= 3?

  In addition, you have "add to the file" disabled on your writing to the worksheet, so whenever you write that you are overwriting the old data.  If you want to write constantly, you will lose data.  This can be cured in this affecting true (requiring a new name for file or programmatically removing the old worksheet each time that you run the vi) OR you can recover all your data in a shift register and only write to the file once you have all your available data.

  The error you see is because you try to close your FPGA reference twice.  Simply close it once.

  After seeing your overview, I think this can be cured by simply reading wiring to get your 1440 X 4 items, but as we have seen, this does not work.  Something happens in your system... that's what I want you do... just run the following... code and let me know how much remaining elements it gives you... Once the number remains (I hope for this, and your engine continue to function), press stop, and all values will be presented on a graph for you.  My broken wires are because I do not have the FPGA VI.

  

• Using the scan Mode 9411 cRIO-9074

  Hello

  I use an entrance Module differential differential NI9411 under cRIO-9074 with scan Mode, but I noticed that some problems are present.

  My application needs two encoder and we choose two incremental encoders with 1024pulses/rev. I have configured the NI9411 quadrature Mode, so I can read the position and speed of the encoder. Each shaft turn at different speeds.

  One of them can turn 4.6 rad/s as a maximum speed, while the other hit it up to 402 rad/s. Then, the configuration of the module input filter is set to 1microsed, the time base speed 32768 microseconds and the disabled index mode. These values make for a correct reading? The cRIO scanning speed is set to 1ms.

  On the other hand, watching the tutorials or (http://zone.ni.com/devzone/eda/tut/p/id/7109), that the degree of rotation depends on the encoding type, what type of encoding is used in Scan Mode? X 4?

  Using System Manager OR distributed, one of the encoders to read impulses sometimes sporadic (up to 2 digits) Although the encoder is stopped. However, the other bed is always 0. It seems that the encoder is broken, isn´t it?

  Thanks in advance for your comments

  Hi Juancar,

  I think that the values are suitable. The issue of reading 0 is explained in this KB:

  http://digital.NI.com/public.nsf/allkb/C9088DFDF803CD8B862575F3007C40FD?OpenDocument

  In addition, according to this document:

  http://zone.NI.com/DevZone/CDA/tut/p/ID/7338

  decoding type must be set to X 4.

  I hope this helps! Suerte con ello.

  Jesus

• AUGULAR encoder

  Hello

  I use THIS angular encoder to get the angular position signal. http://zone.NI.com/DevZone/CDA/EPD/p/ID/194

  I use NI9411 to connect A, B and N three pulses and use the meter of chasis 9174.

  The result is always 0.

  But he works with the meter of the ordinary.

  Thanks in advance for your help

  It's certainly analog. NEITHER supports of digital encoders. You will need to make your own interpolator in real time or FPGA with a cRIO or PXI or you will need to get a card from the manufacturer like these of Heidenhain:

  http://www.HEIDENHAIN.com/en_US/products-and-applications/measured-value-acquisition-and-display/int...

  I would opt to find a PCI card or player if I were you. Usually the manufacturer will have one available.