Outputs analog simultaneous NOR-DAQmx USB-6211

Similar Questions

• USB-6211 noise problem

  Hello
  I use an NI USB-6211 device, Windows XP, and I have the problem of blood (photo attached).

  My analog differential signal (signal DC to DC power supply) is connected to an analog input in box usb-6211 (AI1 and AI9 ports).

  The signal I get is evolving between 0V the Volt of entry (in the attached photo - 4V) instead of 4 v DC.

  It might be a good idea to test it with a 9V battery using a differential connection with wiring configuration described in the manual (photo and link below). I know it sounds Basic, but re-seats black connector of i/o to the device might help. Make sure you reference GND AI as well.

  

  http://www.NI.com/PDF/manuals/371931f.PDF

• Strange analog output of USB-6211

  I just got USB-6211 to replace USB-6001 to set the clock to external sampling on analog output for LED lighting control. The part of external clock example works fine, but the analog output voltage is strange. To do self-monitoring, I connected control pin LED to AO0 & AI0 of surveillance in the NI MAX test panel and LED control on the ground at AO - GND & GND HAVE since I have both USB-6001 and USB-6211, I conducted tests on two of them with the same setting of wire. When I generate sine wave - 5V to 5V to AO0 (from NI MAX test panel), USB-6001 can monitor the same signal AI0, but watch USB-6211 - 3, 4V to 3.4V voltage truncated. I did the test separately (wiring one device at a time), so there is no interference between the two devices. USB-6211 past self-calibration and self-monitoring. Also, I did reset devices. I don't know why they would behave differently with the same configuration, and I hope that someone could help with this question. Thank you.

  Hi skuo1008,

  The USB-6001 can support + / 5 output current my from terminals to analog output, while the USB-6211 box can provide only +/-2 my current output.  It is likely that the load impedance is too low, causing the 6211 to hit its current compliance and thus cut the tension.  If you try to exchange your load with a resistance of at least 5 v/.002A = 2500 Ohms, you should be able to see the full +/-5V sine wave.  I suspect that your DUT has a words 3.4V/.002A = 1700 Ohms impedance.  You could use a device with higher output current or use a more current source buffer circuit.  If you do not need a bipolar output, you might also consider using digital lines to control the LEDs.

  Kind regards

• Outputs analog USB-6211 won't go below 3.375V

  I use a 6211 to pulse output 0 - 5V outputs analog using an external clock as a trigger, and after successfully using the system for a while I finished with a question where none of the channels AO out lower voltages at 3.375V. My current theory is that I can have exceeded the current 2mA max output, but I don't know how, which would result in what seems to be a permanent tension.

  I have reset the device and tried using other computers, but the problem remains. I ran the diagnostic utility and it fails part AO when it tries to output 0V and reads the 3V but he gave no further information. All other parts of the diagnosis are very good.

  Any help would be appreciated, I'm a little stuck on my diagnosis.

  Hi Airgunner1,

  I'm not quite sure because I've never worked this side of the process, but if you call in they should be able to tell what your options are. Sorry I can't be more helpful!

• Output analog, the USB-6009 case - can I use DAQmxWriteAnalogScalarF64?

  I just got a NI USB-6009 and I try to use the outputs analog simple.

  I'm running on a Mac, so I'll try to use the API OR-DAQmx Base 3.2 C (downloaded from here: http://joule.ni.com/nidu/cds/view/p/id/1078/lang/en).  This is the most recent version of NOR-DAQmxBase, I could find.

  I try to do continuous analog output on the 6009, which does not have a built-in clock.   I was hoping to do the sync software and just new output values when I want to.

  I can't get an output of database to work.  Other messages and the example of Windows files, (e.g., National Instruments/NOR-DAQmx Base/examples/ao/MultVoltUpates-SWTimed.c) it seems that the best thing to do would be to use the DAQmxWriteAnalogScalarF64 function.

  However, this is not in the Mac version of the C API of NIDAQmxBase.  There is actually an entry for this in the NIDAQmxBase.h file, but it is commented out.  Anyone know why?  Is it possible to use this function for the analog output on request on Mac?

  Thank you.

  Clement

  I have NEITHER-DAQmx Base installed 3.2 on a 10.4.11 system.  One of the examples files 'genVoltage.c' calls DAQmxBaseWriteAnalogF64.  I was able to compile and run this example with a USB-6009.

  The DAQmxBaseWriteAnalogF64 function would work for you?

  My guess is that, since you can write a scalar value with DAQmxBaseWriteAnalogF64, DAQmxBaseWriteAnalogScalarF64 becomes superfluous.  The example provided with the installation shows how to write a unique value (i.e. scalar.).  I pasted the code of OR below.

  int main (int argc, char * argv [])

  {

  Task settings

  Int32 error = 0;

  TaskHandle taskHandle = 0;

  char errBuff [2048] = {'\0'};

  Channel settings

  Char [] = "Dev1/ao0" chan

  float64 min = 0.0;

  float64 max = 5.0;

  Sync settings

  uInt64 samplesPerChan = 1;

  Writing data parameters

  float64 data = 3.25;

  pointsWritten of Int32;

  float64 timeout = 10.0;

  DAQmxErrChk (DAQmxBaseCreateTask("",&taskHandle));

  DAQmxErrChk (DAQmxBaseCreateAOVoltageChan(taskHandle,chan,"",min,max,DAQmx_Val_Volts,));

  DAQmxErrChk (DAQmxBaseStartTask (taskHandle));

  DAQmxErrChk (DAQmxBaseWriteAnalogF64(taskHandle,samplesPerChan,0,timeout,DAQmx_Val_GroupByChannel,&data,&pointsWritten,));

  Error:

  If (DAQmxFailed (error))

  DAQmxBaseGetExtendedErrorInfo (errBuff, 2048);

  If (taskHandle! = 0) {}

  DAQmxBaseStopTask (taskHandle);

  DAQmxBaseClearTask (taskHandle);

  }

  If (DAQmxFailed (error))

  printf ("error in DAQmxBase: %s\n",errBuff); ")

  return 0;

  }

  Hope this helps!

• Sampling frequency for the output of an acquisition of data USB-6211 card?

  Hello-

  I use a CGI CMOS FireWire camera to read an interference figure, then using a transformed of Fourier transform spectral interferometery (FTSI) phase recovery simple algorithm to detect the relative phase between the successive shots.  My camera has a linear 28 kHz scan rate, and I programmed my phase retrieval algorithm take ms ~0.7 (of a trigger of camera at the exit of the phase). I use the live signal to control a piezoelectric stack, by sending a voltage single sample to the analog output of a data USB-6211 acquisition card.

  Send this output voltage increases the time of my loop 4 m, I would really like to achieve a 1 kHz or better sampling rate. Is the problem with my DAQ card or with the processor in my computer? The DAQ cards of NOR can support these speeds?

  Thank you

  -Mike Chini

  Hey Mike,

  With USB, your loop rate will be around or under 1 kHz, even on the best of the systems. USB has a higher latency and less determism PCI and PCIe. You can get rates AO one much better sample on a PCI card, potentially a PCI-6221. We have a few HAVE points of reference for targets of RT for PCI, / AO in a loop, you should be able to get similar performance in Windows, but if you do a lot other treatments may suffer from your local loop rates.

  Hope this helps,

  Andrew S

• Clock and hw external trigger with USB-6210 on Linux with NOR-DAQmx Base?

  I have two devices USB-6210 I need to synchronize so that they both collect data exactly at the same time. I was told by support OR I can send the clock off Dev1/PFI4 and have the two USB-6210 s read the clock in through their own PFI0. I also want to trigger data collected for each device by sending a trigger off Dev1/PFI6 and have two devices to receive the signal on PFI2.

  All my attempts to try this are filled with error messages and my research online seem to say that's not possible with USB devices on NOR-DAQmx Base 3.4.0f2 on Linux.

  I "ve tried using example AI programs and those who do not seem to work either for external clocks. Here is the code I tried:

  #include "NIDAQmxBase.h"#include 
  
  #define DAQmxErrChk(functionCall) { if( DAQmxFailed(error=(functionCall)) ) { goto Error; } }
  
  int main(void){    // Task parameters    int32       error = 0;    TaskHandle  taskHandle = 0;    char        errBuff[2048]={'\0'};    int32       i;
  
      // Channel parameters    char        chan[] = "Dev1/ai0";    float64     min = -10.0;    float64     max = 10.0;
  
      // Timing parameters    char        clockSource[] = "/Dev1/PFI7";    uInt64      samplesPerChan = 1000;    float64     sampleRate = 10000.0;
  
      // Data read parameters    #define     bufferSize (uInt32)1000    float64     data[bufferSize];    int32       pointsToRead = bufferSize;    int32       pointsRead;    float64     timeout = 10.0;
  
  printf("Calling CreateTask...\n");    DAQmxErrChk (DAQmxBaseCreateTask("",&taskHandle));printf("Calling CreateAIVoltageChan...\n");    DAQmxErrChk (DAQmxBaseCreateAIVoltageChan(taskHandle,chan,"",DAQmx_Val_Cfg_Default,min,max,DAQmx_Val_Volts,NULL));printf("Calling CfgSampleClkTiming...\n");    DAQmxErrChk (DAQmxBaseCfgSampClkTiming(taskHandle,clockSource,sampleRate,DAQmx_Val_Rising,DAQmx_Val_FiniteSamps,samplesPerChan));printf("Calling StartTask...\n");    DAQmxErrChk (DAQmxBaseStartTask(taskHandle));printf("Calling ReadAnalogF64\n");    DAQmxErrChk (DAQmxBaseReadAnalogF64(taskHandle,pointsToRead,timeout,DAQmx_Val_GroupByChannel,data,bufferSize,&pointsRead,NULL));
  
      printf ("Acquired %d samples\n", pointsRead);
  
      // Just print out the first 10 points    for (i = 0; i < 10; ++i)        printf ("data[%d] = %f\n", i, data[i]);
  
  Error:    if( DAQmxFailed(error) )        DAQmxBaseGetExtendedErrorInfo(errBuff,2048);    if(taskHandle != 0) {        DAQmxBaseStopTask (taskHandle);        DAQmxBaseClearTask (taskHandle);    }    if( DAQmxFailed(error) )       printf ("DAQmxBase Error %d: %s\n", error, errBuff);    return 0;}
  

  When I run the resulting program, I see this:

  $. / acquireNScans-ExtClk
  The CreateTask call...
  Call for CreateAIVoltageChan...
  Call for CfgSampleClkTiming...
  Error-89136 DAQmxBase: route specified cannot be satisfied, because the hardware does not support it.

  For example, a clock and a trigger can be imported via one of the PFI lines by using a USB-6210 on Linux with NOR-DAQmx Base? A clock and a trigger exportable via one of the PFI lines?

  If so, does anyone have the code example illustrating how to do this, or can you at least tell me the names of the lines ("PFI0/Dev1" or other) so I can try again?

  Clues or suggestions would be helpful.

  Thank you

  -Tom

  The clockSource in the example specifies an output rather than an input channel channel. Change source "/ Dev1 / PFI0" solved the problem.

  Please close this post.

• NOR-DAQmx C to run two cards USB M series

  Hello

  I am a newbie in working with DAQmx system and need help on the synchronization of multiple USB DAQ devices. The goal is to start the collection on two USB DAQ for M-series card, and we use C codes (via the DAQmx ANSI C library) to do this. I read and resources OR more guides: "Several hardware DAQ synchronization" (http://www.ni.com/dataacquisition/videos.htm), and examples of code on the dev box NOR: "NOR-DAQmx: HAVE / simultaneous in CVI AO" (http://zone.ni.com/devzone/cda/epd/p/id/879).

  My understanding is as follows:

  1. set the first card as the master and export the signal 'StartTrigger' and 'SampleClock' PFI1 and PFI2 (the physical axis).

  2. connect physically with pin PFI1 and PFI2 (sources) of MasterCard wire on pin of PFI0 and PFI1 (destination) in the slave card.

  3. set the task of the slave to use the beginning of digital dashboard using PFI0 and configure the sample clock of the slave task to use the clock of the source of the exported signal from main task to PFI1 (the slave PIN).

  So far the result does not work. The error still shows as if the physical connection is not recognized (I have not yet found a way to check if the signal exported successfully or not).

  I have attached the instant routing table to the map created in the MAX and the code snippet I used.

  Any help is welcome. Thank you!

  Hi kusg.

  DAQmx unclear that some PFI terminals on your two devices are interconnected, and you can't tell him that they are connected because DAQmx only supports connections inter-appareils for chassis PXI, not PFI terminals and cables of the RTSI. So export terminals PFI of Dev2 Dev1 task signals won't work.

  However, you can export terminals PFI of Dev1 Dev1 task signals. Try to do this instead, and the error should go away (as I think it is to assume that it is error-89124).

  In addition, when you use PFI, I recommend committing the master task before you begin the task of the slave, to start the master task does not generate unwanted edges digital:

  DAQmxTaskControl (masterTask, DAQmx_Val_Commit);

  DAQmxStartTask (slaveTask);

  DAQmxStartTask (masterTask);

  Brad

• PWM - output meter (PFI4) USB-6211

  I managed to control a motor based on PWM signal output via USB-6211 AO continuous. Now, I'm trying to use the Terminal counter instead.

  Can't seem to make it work. NA not get a signal when link the PFI4 terminal to an oscilloscope.

  I don't know wheather my coding is wrong or does not have my wiring (i.e. of USB-6211 for motor continuous). I need to use the terminal of meter that I used the analog output to a different measure.

  Please advice. Attached encodings.

  Thank you very much.

  Front of conneting to DC motor, make sure first that the PWM is get generated correctly... use oscilloscope.

  And have you changed the constant (physical terminals) for your device...?

  

  Change to:

  Dev1/ctr0 & Dev1/PFI4 and the scheme of connection must be:

  

• Digital magnification of output using USB-6211

  Hello

  I'm trying to use the example of LV "Cont writing dig port - Int clk.vi" to generate a model.

  But I get the error-200077 on the sample clock. The popup error message suggests

  using "we demand", but it doesn't have the choice with the DAQmx.

  Any clue?  Thank you.

  It is correct. USB-6211 case doesn't have a digital time - analog base only. That's why the (63xx) X series cards are supported only for this example.

• Firmware of switching of NOR-DAQmx Base on Linux to the USB-6221

  Our Windows machines are locked - even as developers, we without administrator privileges.  Which is updated from the impossible firmware via the Windows Device Manager.  On the other hand, we have total control on our Linux machines.

  Is it possible to download and check out the images of the firmware on Linux?  In particular, I need to move a USB-6221 to NOR-DAQmx Base.  I couldn't find all the instructions to do this on Linux.

  wlbaker

  I had a moment of complete Dyslexics your first post - powered external USB DAQ playback devices (USB-622 x, USB-625 x USB-628 x) are not supported under Linux (by DAQmx 8.0.1 or DAQmx Base 3.3), while DAQ USB (USB-621 x) bus-powered devices are supported by only DAQmx Base. The Readme files for the two drivers list the devices on which they based [1] [2].

  The USB-6212 case is the closest to the USB-6221 match, although if you don't have extenstive digital i/o in your application, the USB-6211 housing would also be a good fit.

  [1] DAQmx 8.0.1 Readme
  http://FTP.NI.com/support/softlib/multifunction_daq/nidaqmx/8.0.1%20Linux%20Only/Readme.txt

  [2] DAQmx Base 3.3 Readme
  http://FTP.NI.com/support/softlib/multifunction_daq/nidaqmxbase/3.3/Linux/Readme.txt

• USB-6211 - digital output not supported?

  Hi all

  I can't use the USB6211 device port... I use daqmx with Delphi7 API functions.

  First of all, I tried this:

  DAQmxCreateTask('', @TaskDO);
  DAQmxCreateDOChan (TaskDO, PChar('Dev1/port0'), ", DAQmx_Val_ChanForAllLines);
  DAQmxWriteDigitalU8 (TaskDO, 1, 1, 1, DAQmx_Val_GroupByChannel, $FF, @written, nil);

  I had an error in the DAQmxWriteDigitalU8:-200012 (= digital output not supported). (???)

  OK, I tried to disable autostart option based on DAQmxWriteDigitalU8 and insert a 'manual' start in the code:

  DAQmxCreateTask('', @TaskDO);
  DAQmxCreateDOChan (TaskDO, PChar('Dev1/port0'), ", DAQmx_Val_ChanForAllLines);
  DAQmxStartTask (TaskDO);
  DAQmxWriteDigitalU8 (TaskDO, 1, 0, 1, DAQmx_Val_GroupByChannel, $FF, @written, nil);
  DAQmxStopTask (TaskDO);

  Now, I got the same error in DAQmxStartTask:-200012 (Digital Output not supported, once again). (?????)

  I don't understand.. 'Digital output not supported "? USB-6211 has 4 lines! What is the problem?

  I want to just turn on and off the lines from code...

  -Cs George-

  Well, finally I figured out...

  Here is the solution:

  DAQmxCreateTask('', @TaskDO);
  DAQmxCreateDOChan (TaskDO, PChar('Dev1/port1'), ", DAQmx_Val_ChanForAllLines);
  DAQmxWriteDigitalU8 (TaskDO, 1, @dummy, 1, DAQmx_Val_GroupByChannel, @bitmask, @written, nil);

  Digital output lines are on port1! Corrected parameter.
  And the part of the interface of DAQmxWriteDigitalU8 had to be changed (in nidaqmx.pas).
  I don't know why, but the AutoStart (dummy) parameter in the DAQmxWriteDigitalU8 function is ignored: function always starts task automatically, regardless of the value of autostart. But this isn't a problem for me.

  -Cs George-

• Strange problem with analog simultaneous output / input

  I use a card PCI-6221. I have an application which generates 2 waveforms (finished samples) and simultaneously records 4 channels of analog input. I am using the sample clock AO as the sample for the analog clock.

  As a test, I plugged in the first AO (AO0) all 4 channel inputs. What happens when I run the vi, it's that the first sample on the first string (AI0) has the value of the last sample that was out on AO0, of the previous generation.

  Example:

  AI0 AI1 AI2 AI3

  -0.369-0,001-0,001-0,001

  -0.001 0.062 0.062 0.062

  0.062 0,124 0,124 0,124

  etc.

  I understand that it is a problem with the relative time of update of the AO and sampling of IT.

  He has to go: AI0 read / write AO0 / read AI1 / read AI2 / read AI3.

  I use DAQmx Timing (sample clock) to specify the clock AO as the sample for the AI clock. I noticed that this has an advantage of input terminal called assets. Ah, I thought - if I put the active side to neutralize the AI always begins sampling half a clock cycle after the OD has updated. Evil. It makes absolutely no difference. Maybe the AO clock signal is a very short pulse?

  Is there a way to specify the order in which updated inputs and outputs analog / sample?

  Hi CDancer,

  Change analog output voltage is not instantaneous. It depends on the speed of scanning of the Council with the difference the tension of the previous.

  You're right that the AO sample clock is a very short pulse. As far as I remember, it is the order of 50 ns.

  Here are two ways to insert a break between the tasks of HAVE and AO:

  • Delay the first conversion of IA (AI0) regarding the sample clock HAVE: use DAQmx calendar > more > converted > sample clock delay > Delay and DelayUnits properties.
  • Delay the sample clock HAVE first with regard to the relaxation of beginning of AI: use the DAQmx > start > more > Delay and DelayUnits properties.

  Brad

• NOR-DAQmx 9.2.2 for 6251 USB works for labview 8.2?

  Driver download OR-DAQmx 9.2.2 USB 6251 work for labview 8.2?

  Thanks in advance

  NOR-DAQmx 9.1.1 was the last version to officially support LabVIEW 8.2

  NIquist: I'm a student as to why this KB seems to have disappeared in the air.  I can see inside, but not outside.  I'll update the post you linked when I tell me what's wrong.

• USB-6211 w / DAQmx

  Hello all,.

  Asking if any user can check that the DAQmx; Channel Properties node; Filter; Calculation of the average of windowing is supported by the NI USB-6211 OEM Board?

  This feature is essential for the intended application and need to know before ordering.

  Group thank you,

  Chris

  Hi Chris,

  > By 'no it isn't' I assume you mean that it cannot be what I need. Make you that statement, even if you don't know whatever it is general or specific to the needs of my application )

  I wrote "No, it isn't" as an answer to your question. I should write, "no, the AI. AveragingWinSize property is not supported by the NI USB-6211 OEM Board. »

  Brad