cDAQ-9172

Similar Questions

• Impossible to get more than 1 channel to read with DAQmx cDAQ-9172 under Windows 7

  I have the cell load, voltage, and input thermocouple connected to a cDAQ-9172. My sensors entries have been scaled and verified in MAX, and all of them work.  DASYLab 13, the driver is "dcDASY.dll" and the hardware configuration is "NI MAX.

  When I add a task NEITHER-DAQmx Analog Input (that is, a set of scales) it appears correctly. If I add a second channel of the task and select it, I get this message:
  'Channel of task name saved with the module is not available. DASYLab resets the module parameters for usable first channel name task. »
  The name of the task remains the same for each new channel I have Add. If I change the name of the task by using the tab to the drop down menu, it says:
  "You have configured several ways out for the module. If you modify the task, you lose the settings. You want to change the task? »
  Both display the same data channels, and I can't work simultaneously several channels. It seems I missed something obvious, but I can't.

  The parameters are:

  Measurement and Automation Explorer 4.6.1
  NOR-DAQmx 9.0

  Material:-cDAQ-9172
  Slot 1 - NOR 9215 (0-10 Vdc analog voltage)
  Slot 2 - NEITHER 9211 (thermocouple)
  slot 3 - NI 9481 (relay)
  slot 4 - NI 9237 (entry deck w / excitement)
  housing 5 - OR 9402 (DIO)
  slot 6 - NI 9263 (0-10 Vdc output analog)

  Thank you

  You can't perform different tasks (continuous) HERE on a single chassis. The first tasks that starts will be 'the resource booking '.

  Combine the AIs of the various modules in a single task (see photo): start by creating the task of thermocouple. Then add AIs 9237 (e.g. Kraft) and 9215 (volts) using the button with the blue, symbol. Set the mode of synchronization of the task of "continue". Save the task, start DASYLab (second photo).

  Change a task (adding channels, etc.) to the MAX while DASYLab works always, will result in unexpected behavior. To synchronize the configuration of MAX with DASYLab, you will need to close/restart DASYLab or use the 'sync' of the function (see photo 3 "syncmax.jpg"). You can set this function as a shortcut by right-clicking on one of the eight green or grey circle things.

  You should think about an update of the MAX/DAqmx drivers. 9.x is a little outdated.

  Updated at least DAQmx 9.9, better 14.x or 15. 0 (stay far 15 1.x).

• cDAQ-9172 error message 200485 in Labview and 88705 Max

  My company has had this machine for awhile not operational.  I decided it was time to get this thing running but continue to flock to the top with a 200485 error when I try to run Labview and 88705-error when I try to change anything in the cDAQ-9172 runs at MAX.  I'll try to update the software and reinstall the drivers in the hope that it is a mistake to simple communication from the device to the computer, but in case it's something more serious that I am not seeing that I wanted to post this in the hope that someone might have an answer.  Thank you

  I would start by checking the device loader OR. Error 88705 in MAX is caused because the Windows Service OR device charger has not been loaded. Below is an article about starting the service knowledge base.

  http://digital.NI.com/public.nsf/webPreview/89A6279147AA994A862572DF00491BCA?OpenDocument

  Thank you

  Steven Koo

• Bad analog output help Every_N_Samples-NI-9263 cDAQ-9172 chassis (works with cDAQ-9178 chassis)

  Hello

  The NOR-9263 analog output voltage geberation works correctly with the cDAQ-9178 chassis but gives wrong result using the chassis NOR cDAQ-9172.

  In the attached code example, a single cycle of a sine wave is composed of 40000 samples and came out in the background using Every_N_Samples at a rate of production of 5000 samples per second.

  The output buffer size is set to 10000 samples.

  Prepare us the buffer writing 10000 samples 1, then write the remaining data in the background using the Every_N_Samples callback.
   
  Bug: Using the cDAQ-9172 chassis, to the 5000 s/s sampling rate with the help of an external field (or through closure to another HAVE), we observed that 1 10000 samples came out twice, followed by the rest of the waveform. The last 10000 samples are never exits. If you are working properly, we would expect to see 1 full cycle of a sine wave.

  The bug does not occur with the chassis NOR cDAQ-9178. I use the driver NIDAQmx v9.2.1f0 on Windows XP
  The bug does not happen with simulation devices, so you will need to use harwdare real to reproduce.

  Please find attached an example of code C based on the example program OR "ContGen - IntClk.c" to reproduce this bug.

  Thank you

  whemdan,

  The MathWorks

  Hi whemdan,

  By default, DAQmx regenerate old samples if no new data is available.  To give the correct behavior, you can:

  Use DAQmxSetWriteRegenMode to disable the regeneration (DAQmx_Val_DoNotAllowRegen).  In most cases, this is recommended if new data are written continuously in the buffer as the build is in progress.

  If you just need to generate 40 k samples, you can write them just all at once, rather than in 10 pieces of k (the code you attached probably is just an example, so I'll assume that you have a reason to write the data into segments in your actual code).

  I think the difference in behavior between 9172 and 9178 can if explained by the different way, buffering is set up on each product.  The 9172 uses a buffer of 8 k (on the STC2) in all cases (source).  The 9178 uses an 8 k of memory buffer (on the STC3) If you use regeneration shipped, but uses the 127 samples FIFO cartridge, if you use no on-board regeneration (source).

  Then... on the 9172 8191 samples are immediately transferred to the FIFO.  By default, the hardware is going to request new data when the FIFO is less to fill (this is configurable with DAQmxSetAODataXferReqCond).  I'm not sure what the transfer data request size is in your case (you can set the maximum value with DAQmxSetAOUsbXferReqSize), but obviously it is bigger than the other 1809 samples that you have not yet sent to the Board of Directors of your first entry.  At this point, the pilot will regenerate 10 existing k samples so that sufficient data will be available to meet the demand of data transfer.

  The 9178 however use the FIFO of 127 smaller samples so you will not have the same behavior in your case.

  In summary, the behavior is explainable by the difference of material.  If you want to avoid to regenerate old samples, you should ban the regeneration using DAQmxSetWriteRegenMode.

  Best regards

• Run an application of LabVIEW 8.6 in win 7 (using the cDAQ-9172, 9219, 9422)

  Hello.

  I did a LabVIEW application for a few years. At that time, I used windows XP and labview 8.6. The material used is the cDAQ-9172, with NEITHER-9219 (reading of four strain gage sensors) and a NOR-9422 (using only a single input frequency).

  First of all, can I install my old version of labview 8.6 in my 64-bit computer to windows 7? I got an error message when I tried...

  Second, how much should I install? My old computer was slower after you install labview with its pilots. Perhaps I installed too much? Do I have to install 1, 5 GB DAQmx drivers?

  If I need a new version of labview for win 7, how much is an update?

  Thank you!

  Hello

  First version of LabVIEW which is supported on Windows 7 is LabVIEW 2009 SP1.

  Regarding the drivers, if you want to develop or run VI:s in LabVIEW with the DAQmx API, then you must install the full DAQmx driver.

  If you only meet built executable in the LabVIEW environment to run, then you just DAQmx Base Runtime.

  If you also want to be able to configure the data acquisition equipment (to the MAX) in a runtime environment, you should also Configuration DAQmx execution.

  For upgrades of licenses if please contact the local office of National Instruments or follow this link:

  http://ohm.NI.com/advisors/UA/pages/UA/intro.XHTML

  Best regards

  Klas Andersson

  OR Sweden

• Sampling frequency for digital sampling (cDAQ-9172 & NI 9401)

  Hello!

  I have a cDAQ-9172 with NI 9401 C-series (digital) module. I would like to taste the digital inputs with a sampling frequency of e.g. 400 or 200 kHz. My problem is that I can only choose a clock 100kHzTimebase and therefore only get a sampling rate of 100 kHz. The 20MHzTimebase clock is too fast, as it gives me a sampling rate of 20 MHz). Is it possible to get a defined user e.g. 200 kHz sampling frequency, dividing for example down the clock of 20MHzTimebase?

  Thank you! Last post and this article using the internal one or cDAQ chassis counters has solved my problem.

• new cDAQ-9178 chassis was smaller than the cDAQ-9172 old buffer?

  Digital waveform features:

  Waveform acquisition (DI) FIFO for cDAQ-9172: 2047 samples

  Waveform acquisition (DI) FIFO for cDAQ-9178: 127 samples per slot

  This means that the new HW (9178) has a much smaller than the old buffer (9172)!

  I want to run a correlation over generation/acquisition at 2 MHz with 2000 samples. Does this mean that the new chassis will not be able to acquire the whole of the data (I use a NI 9401 module inside the chassis)?

  FIFO sizes are misleading and not a true indicator of the chassis supporting the streaming is not the single buffer.  We did some tests comparing the latest and cDAQ-9172 chassis.  You will not notice the difference, especially with your application to a finished task of 2 000 samples at 2 MHz.  With 2 000 samples, you can run your DI task on your chassis cDAQ-9178 at 10 MHz if you wanted without problem (don't try with continuous or even finished tasks).

  The only time where the FIFO size really comes into play is when you run a primary task at high rates, say > 5 MHz, even if it is system dependent.  At these speeds a FIFO that is deeper 2 000 samples you buy only tens or hundreds of additional microseconds when Windows jitter is measured in milliseconds.

  I would be very surprised if there is a practical application that worked on a cDAQ-9172 chassis which did not work on newer USB cDAQ chassis.

• samples cdaq-9172

  The following vi allows the user to choose 1-8 global data channels and record is a record for a certain time or number of samples. A file is written to the location selected users. Any channel can be separately filtered through an IIR filter, and the user can select the rate and sample size. There is a graphical display of each channel and a digital display for each. The problem is that I get a time-out of samples. If I put the high sample rate (say 2500) I start missing samples. I use 9172 cDAQ chassis. The error is 200279, tried to read samples is no longer available. In the recording of samples or when you save a timed record, the number of samples are not correct at higher rates. Can I have a problem with my logic of vi?

  The time base of 80 MHz can be used for the counter / timer source contributions.  Generally, the 20 MHz or 100 kHz is used to generate the synchronization signals HAVE and AO.  This information and more, are in NEITHER cDAQ-9172 User Guide and Specifications.  Therefore, the question with the x-axis is probably because he is trying to use a basis of time which is too high.  In order to read faster, we can increase the number of samples per channel to read with the lu DAQmx vi, as suggested by this article in the knowledge base .  In addition, you may want to move the part of the acquisition of data from your application to a producer / architecture of consumer, who may also increase the rate of reading.  There is an example of the producer / consumer at the bottom of the knowledge base article linked above architecture.  In addition, this Tutorial DeveloperZone has a good explanation of the design model.

  David

  Technical sales engineer

  National Instruments

• Encoder speed and orientation on the NI 9401 in cDAQ-9172

  Hello, I have a module or 9401 for my cDAQ-9172 and she is now installed in five slot to connect a dual channel encoder. Channel A is connected to pin 14 and channel B to pin 17 and the encoder is powered by 5v dc.

  I want to measure the speed and if possible rotation orientation.

  Fix for this that I started the VI, who can count total impulses in the encoder.

  My question is, how do I change the DAQmx create frequency channel and DAQmx Read of impulse 1 Chan 1 Samp Freq counter, calculate the speed real encoder and orientation?

  Quintino Hi and sorry for not having answered quickly.

  Your VI works perfectly well for low frequencies with me. If you want to measure fairly high frequency (> 1 kHz), you may need to check how a measure of 2 meters. You will find an example attached (lv2009). Just plug the signal at the source of one of the meter (ctr0 for example), then set it to the value of the counter on the VI ctr0 control. Use a splitter too high (4 is fine). I was able to compete with the signals of 1 MHz on my Board.

  If the problem of failover is still happening after that, try to make a measurement with a low frequency generator and 1 meter to check if the problem is the system (it takes).

• How to use an internal counter of the cDAQ-9172 for measure PWM and generate the frequency?

  Hello

  Requirement of my project is to measure 6-channel PWM and generate 5 frequency channels.

  Suggestion of engineer OR bought cDAQ-9172 chassis and NI 9423 (8 DI correlated) and NI 9474 (8 correlated DO) for this requirement. I have a few questions

  Article:

  1 > what should I know to customize my CompactDaq 9172 chassis

  http://zone.NI.com/DevZone/CDA/tut/p/ID/9367

  I know that this way to synchronize the physical support 32 correlation system pin o for housing 1-4.

  => I'm not really sure how to use these channels synchronization support.

  2 > using internal counters on one NOR cDAQ-9172 as a sample for other tasks clock

  http://digital.NI.com/public.nsf/allkb/ADFC4DD8C9690232862575B70079FBD4

  I know that I can change the ownership of the physical channel so I can get 2 meter outside the frame 6 and 7.

  => I do not think that this solution will be me because I can use only 2 counters with this method.

  Could someone tell me please how to fix my project requirement? How to choose the setting for DAQmx screws?

  I have experience with measure the PWM and generate the frequency, but with separated against only.

  Best regards

  Thang Nguyen

  Hey Thang.

  AHA... for this, you can use the channel property node.

  

  See you soon

  Lab

• I overload with cDAQ-9172 and the NI 9234

  The DAQmx Read property for ' overloaded channels exist "is not supported by my hardware (cDAQ-9172 with NI 9234). What can I use to stop the vi if the tension in the analog input is overloaded?

  

• Synchronized in my cDAQ-9172 multiple input signals?

  I use NEITHER cDAQ-9172, and I currently have 20 signals from various sensors (acceleration, speed, power, etc.). How can ensure me that when I start my vi, all input data is saved from the exact same hour?

  Here is a link that I hope is useful, do not hesitate to ask questions:

  http://zone.NI.com/DevZone/CDA/EPD/p/ID/5259

  This program example will show you how to perform a synchronization module multiple analog inputs with CompactDAQ.

• cDAQ-9172 chassis ground

  cDAQ9172 said that the Earth correctly (page 15, Fig. 6) user guide the chassis:

  "attached a leg of the ring to gauge AWG 14 wire. Connect the leg of the ring to the Terminal on the side of the cahssis screws from land. Connect the other end of the cable to the Earth of the system security.

  So I connected the leg of the ring to the ground on the side of 9172 screw. Can someone show me where should I attached the other end of this cable to found the chassis correctly?

  Thank you very much!

  If you use a cable with shielding, also of the shield of protection must be linked to the earth so that it is truly effective.  Connect the shield at the end of the cDAQ should suffice.  Please note that the shield of the cable is different from the + and - connections in a cable.  If you use a 9234 BNC connectors, it is likely that you have not also shield you must connect.  Most of the time, shield wire is twisted cables.

• Implementation road NOR cDAQ-9172 with NI9477 and NI9426

  I calm down fees on labview and I just get a NI9172 with a NI9477 and NI9426. I really need an example to start learning the use of these devices. Is there any file .vi who showed me how to read and write these devices?

  Thank you

  Olivier

  Hi Oliver,.

  Two of these modules use the DAQmx driver and are programmed as the rest of the DAQmx devices.  There are examples that are installed with the driver located in LabVIEW.  In LabVIEW select help > find examples of open OR example Finder, then expand material input and output > DAQmx > digital generation or digital measures

  I hope this helps!

• Get samples of the clock machine (NEITHER with NOR cDAQ-9172-9422)

  Hey guys

  I'm trying to produce data for the position of a 1000 Hz all about stamping press with an absolute encoder which is connected to the NOR-DAQ.

  Two not that I am trying to program, but can not understand:

  (1) use a hardware clock to trigger the acquisition of the data at the selected speed

  (2) synchronize the three data acquisition modules I have to ensure that all data are received at the same time

  the material I have does not seem to have any counters. A few examples that I read would not go because of this.

  Any thoughts? If there is some examples/tutorials about this problem that I have missed please let me know.

  Thank you

  Hey, Rohan,.

  Thanks a lot for your help. I was talking to a National Instruments process engineer yesterday and it me that the problem was the vi calendar clock source option - instead of using AI/SampleClock, I had to use the time base of 100 kHz clock that did not appear in the list until I checked the option "ListAdvanced Terminal" in the name of e/s filtering dialog box. You must right-click the constant/control of the source of the clock and select I/O name filtering to open this dialog box.

  Thanks for all your suggestions, I'll try to apply it and check the performance.

  Nik