LabVIEW Visa Usb VI

Similar Questions

• LabVIEW VIs for HP 35670 has

  The link to the labview for HP 35670 A screw is no longer valid and the same search returns nothing.  Does anyone have the Labview VIs for this instrument?

  The last message is in 2004 (see below)

  The instrument for the HP 35670 A driver is only
  supported under LabVIEW 6 and 7. You need to upgrade to the latest
  version of LabVIEW to use the HP 35670 A driver or the
  drivers newer than we release in the future.

  The instrument
  Driver for HP 35670 A can be found on our website at
  http://zone.NI.com/idnet97.nsf/9b2b33e1993d877786256436006ec498/61f1c707c2f10906862568ab005fb9ff?OPE...

  Why don't you go to the Instrument Driver Network? I don't know what kind of research did you, but the driver is still available and can be found by using the search option here.

• Ability to control LabVIEW VIs, via a standard Web browser

  Ability to control LabVIEW VIs, via a standard Web browser?

  Do you know where I can get information on this operation?

  I want to be able to control Labview Vis through the web.

  Have you tried the manual? That's where.

• How to read the Serial Arduino data using labview VISA?

  Hi =). Im a beginner work reading data series from an arduino but im facing... Lets do it step by step

  I built a voltage divider circuit which gives from output
  from 0 to 5V. The output of this circuit is sent to a 0 analog input pin
  of a Committee of Arduino Duemilanove.

  (1) Firstly, I connected the cable to connect to my laptop USB the Arduino.

  (2) I went to start-> control
  Control Panel-> system-> hardware-> Device Manager. Check the Ports (COM
  & LPT). In my laptop I can see USB Serial Port (COM4). Now I know only in
  LabVIEW that I must read the data series COM 4.

  (3) to the side of the arduino, here's the code to read changes in voltage
  entered to analog pin 0. The last line of 'delay' determines the sampling
  Rate of how we want to taste the output of the voltage divider:

  int potPin = 0;    Select the input pin for the output of the voltage divider
  int val = 0;       variable to store the value from the probe

  void setup()
  {
  Serial.begin(9600) (9600);    Opens the serial port, establishes the rate of 9600 bps data
  }

  void loop() {}
  Val = analogRead (potPin); read the value of the voltage divider
  Serial.println (Val);
  Delay (10);
  }

  I slightly modified the basis series reading writing VI... I have
  attached the block schema used with comments. Basically, I tried to read
  data series, divide by 1023 and multiply by 5 to graphic voltage
  variations of the voltage divider circuit.  But Im not getting
  the correct voltage output values. The value of the tension just keeps go
  0 and coming again, as shown in the photo.

  Could you guys please guide me on what went wrong?

  Thank you!

  -you read the data, even if there is no data on the port. If 0 bytes are read => «»

  -in the case of false, you resources VISA wired for the output of channel tunnel?

  -There is no close VISA at the end of the VI resources

  -you're not a loop this VI reading bytes

  I added an addaption of your VI that you should give a try maybe

• MAX and Mac (to control on Labview, NI USB-6008)

  Hi, I would like to order my USB NI 6008 card in my Mac. I'm using Labview, but I'm a real beginner. I get my sensor on my USB card data and I can use them in Labview to control an electric trolley. This project is for my review: engenering school.

  So, on PC (Windows), it's ok, but on my mac, I do not find MAX. And if I understand, I need MAX to create the DAQ Assistant and a few other VI in Labview. However, I have yet install Base DASmx 3.4 for mac os.

  Could you help me please?

  I'm sorry for my English, it's so bad. I'm studying french and I'd rather post here because I found no answers in the french part of forums of NOR.

  See youi soon.

  Thank you

  Thomas L

  The USB-6008 camera is supported with DAQmx Base, Yes. You do not get MAX, but you can always control your USB-6008.

  Install LabVIEW 2010 and DAQmx Base 3.4and this should give you the DAQmx Base vis in LabVIEW palettes.

• VISA USB RAW buffer

  Greetings,

  I have a USB device, I need to communicate with the help of Labview. There is no drivers for this device so I put in place as a device USB of VISA GROSS. I am able to communicate with him, fine, for the most part, but I have problems with data loss.

  This device to stream to the host at a rate relatively high (~1MByte/sec) and I have 3 of them I need to get data of continuously. Data is sent in packets of 512 bytes. When calling VISA Read I Specifies the amount of data I want to read from the device (for example 512 000 bytes approximately 0.5 seconds of data) and the data is received without problem since all 3 devices.

  My problem is that it takes a little short of time nothing to do with the data I just read and read the next time I do a different reading VISA, I lost the data that should have been included while I was managing the data from the old. I simplified my Labview code so that it doesn't the data analyze a few bytes and paste the rest in a queue to be processed in another while loop, but even this bit of transformation takes a few milliseconds. Milliseconds that few data are lost when I next read VISA.

  I think the problem is that USB transfer must be initiated by the host, which means that any buffering must be done in the camera itself, and that this device is not all the buffering. Is this correct? Y at - he tips that I can use to make "continuous play" from a VISA's USB device?

  I might be able to shorten the processing time a little more by not doing ANY analysis on the data, just read and paste it into the queue, but even that will probably take long enough I'll miss a few packets of data (each packet is less than 500 of data).

  Thanks for your suggestions.

  Dave

  You can have several USB readings operate in parallel feeding a notifier data.  Can manage data notifier later in your code.

  I did it with HID before calls to no HID updates were missed.

  Shane.

• visa usb communication in bulk - several end points

  Hi all

  I'll put up a spectrometer optics USB2000 + ocean and want to use visa instead of the dll that I had with the spectrometer (I had a lot of stability problems, moreover, this is not supported by the ocean optics and I won't have to pay for the new version).  I have documentation for the spectrometer and were able to set the integration time and receive ghosts as quickly that the dll has been able to.  But I was not able to read the information of calibration of the spectrometer.  All controls use the transfer block, so I use visa read and write to send/receive.  I think it's the difference between the spectral data and calibration data, that the data comes from different points of termination.   The spectrometer has 4 endpoint addresses (3-PC = IN, 1 PC = OUTSIDE).  The spectral data returns to the first endpoint and the calibration data is on 3rd in.

  Is there a setting I need to change to read from a different end point?  They are all in bulk type according to the documentation.  Any suggestion would be appreciated.

  Thank you!

  Hey gharris,.

  It seems that there is a parameter, you can change by a property node that will change reading from what endpoint. If you use a text-based program, the property, you need to change is VI_ATTR_USB_BULK_IN_PIPE. If you are using LabVIEW, follow these steps:

  First of all, to ask a VISA property on your block diagram node (really any node property works). Then, right-click on the property node and select Select class-> VISA-> / o Session-> USB Raw. This step can be found in attached below EndpointSS1.png and change the property node to a node property USB Raw. Thirdly, left-click on the property and select settings USB-> pipe in bulk. This step can be found in EndpointSS2.png, attached below. It is the property that defines at what endpoint to read from. To change the value of the present, right-click on the property node and select change all to write, which will allow you to connect to an endpoint value.

• Time real ADC/DAC for SMPS by using Labview and USB

  Hi all

  I asked the Sales Department of this same question, so here's a two-pronged approach:

  I am reserching a control algorithm for power switching, and so far, its performance simulations seem to be good.  Now, the goal is to implement the circuit from the experimental data.

  I've seen several NI USB DAQ boxes that seem to have the performance, I'm looking for (for example, the box USB-6211 a sampling rate and resolution I need).

  The control algorithm uses the following mathematical functions: add/sub/mult/div/exhibitor and derivative/integral.

  My question is this: is "strong enough" Labview take four-channel data 250Ksps, crunches the numbers in an equation and spits out the answer to an analogue on the channel, while time REAL?  I'm looking for a rate of analog output of ~ 100 kHz.

  Thank you for any suggestions you have!

  -Rick

  Hey,.

  So if you were trying just to perform an input or output, then the box USB-6211 would certainly be able to treat it as the machine clock could manage the inputs/outputs, no software. However, what you are wanting to do, basically a feedback system, he will have to avoid (at least to a USB device) because you need to be able to specify Active which is the output. So, for this reason alone and the fact that you want out of 100 kHz, this device and the USB devices in general will be not an option any what software you use, LabVIEW or otherwise. On another note, you want to make sounds more like live update, not in real time, which is more on the jitter. Bottom line, for these kinds of requirements, you might need to move to an FPGA card, something like the NI PCIe-7841R would work. It's more expensive, but for your needs, FPGA will be the only option and it comes down to the latency of the bus, but also the response time of software. With FPGA, as shown in the first scheme of the following document, you basically close your software through hardware loop.

  Basics of FPGA

  http://www.NI.com/white-paper/6983/en

  -Ryan S.

• 1208fs for labview 10 usb connection problems

  Hello
  I'm relatively new to Labview and just improved labview 10. I used 6.1 before and had no problems using my mcc Board of 1208fs USB to run experiences before. I tried to connect even to labview 10 on my new computer, and the only thing that will connect to the instacal is. Ive plugged throu instacal, but is not visible in the list of I/O that selects the channel to use. Any help would be appreciated.

  Thank you!
  Andrew

  By the way, my os is windows xp

  Andrew,

  MCC daq devices have a different set of drivers for LabVIEW 8.2.1 LV versions and newer.  See http://www.mccdaq.com/daq-software/universal-library-extensions-lv.aspx this is ULx.

  I have one of the devices USB-1208 and discovered very recently this issue when I wanted to use it in a LV 8.5 application I wrote.  The new driver is actually nicer and DAQmx drivers a little resembles the way you use them.  While the former pilots of the Universal Library for older versions of LabVIEW looked like using traditional DAQ hardware drivers of OR.

• VISA USB

  While NI-VISA supports three types of USB pipes: Does control, in bulk and interrupt, this means that we can develop any device driver USB on this three types and we must not any other low level layer of knowledge? For example, if write us raw data, we simply use the essential mode of writing, and then outgoing data usb would be out of our written data.

  I do not understand your question.

  VISA takes in charge three of maximum 4 eligible different available for USB transfer mechanism.  Isochronous is not supported and a transfer with loss that is not interesting to test and measure in any case.  It is intended only for audio and video where a few lost packets are not so bad.

  All USB devices may support ONLY these four types of transfer.  Note that this does not describe WHAT needs to be transferred by using these methods, only HOW the data is transferred.

  Each device implements its own mix of commands that can be received by transfer of control (all devices are supported on a certain set of commands on the control endpoint zero for the configuration of the device), in bulk or interruption or a mixture of the three.

  If a device does something different than is described in the specification of USB protocol document is not USB conform.

  Shane.

• LabVIEW visa getting slow when connected to arduino

  Visa in labview when connected to the arduino prog becomes slow

  I checked it passes the codde required, but the action is slow

  and the most important every time to get the o/p I must stop the prog, then start again.

  I tried to do a new prog with visa in singlw loop it was due to long progs and constant, as a single string, but always thinking of things don't work the way I would like to know fast n without stopping the prog. I have attached my n of the required part of the diag block image files

  I used a string of length 10 char n I have my program and a single visa write.

  
  

• Read the serial number in LabVIEW of USB-8476 LIN Module

  Is it possible to read the serial number of a USB-8476 module in LabVIEW. I am building a system that will use 10 of these modules in a single system and I want to be able to verify this LINX = serial No.: ABC. I'm afraid that a 'user' will disconnect and the plug-in a USB module causing the FLAX number to change.

  Hi graveux,

  The ncGetHardwareInfo.vi with the attribute set to "Serial number" should do the trick (use the desired USB interface and port number 1 as inputs).

  -B2k

• "Arduino TTL series for Windows (LabVIEW VISA).

  Quick Q to the forum.

  I guess that the TTL output series of Arduino can be read and written directly by LabVIEW but I don't know if this is the case when you use the TTL series on the arduino.

  I realize that it is possible to talk to arduino via its serial port secondary (or primary), one who sets himself up as a port virtual com how a USB serial Converter and use a USB cable. It is very good.

  But what speaks directly to the Council?

  If I want to configure Arduino, a wait loop to pronounce on its input series ttl line how to connect to it from my Windows and LabVIEW?

  I have to worry not about levels of the PC serial port interface? Can I just connect TX RX and ground of the serial port directly at the entrance of serial Arduino TTL?

  Thanks in advance.

  Easiest thing, in my humble OPINION, would be to use a USB-serial to TTL level adapter. Something like this: http://www.mouser.com/Search/Refine.aspx?Keyword=RS-232-WE.

  If not, a search for RS-232 level, removal of the circuits should show a number of options, ranging from IC meant for the task to the discrete component simple circuits.

• synchronize the microcontroller and labview Visa series

  Hello

  I have a small problem with my labVIEW VI. I do the following things:

  1. I send 7 features of the microcontroller to Labview under string (ASCII characters) to a time interval of 31.45mS.
  2. In labview, I read the string with a delay of 32 Ms.
  3. I extracted the individual string data and then get the substring.
  4. I use the string number Converter to convert the number.
  5. Finally, I display data.

  The problem I have is that when bytes (with the Node property) is less than 4000, the reading of the data to be perfect. But once that the port reached 4000 bytes, the data I receive periodic zeros. I think the problem is with the timing of the sending of the microcontroller with the LabView data. I don't know what to do with it. Could someone advise me please to his subject?

  Thanks in advance

  Concerning

  You are only reading 49 bytes at a time.  You tell me that your buffer is longer than 4000 bytes?  That tells me you have a synchronization problem.

  If you get always 49 bytes per message, then just read 49 bytes.  Get rid of the delay and the bytes of the Port.  They are usless.  And since you also use a stop character, which makes them even more useless.  The VISA Read wait upwards for the time-out period to the number of bytes that you said that it a termination character is not received.  If you use a character from endpoint really, I had even put the bytes to read something totally outrageous, like 500.

• Writing LabVIEW visa question

  environment:

  -windows xp professional sp2

  -Labview 8.5

  Description:

  I have an instrument with rs232 interface, when I use the UartAssist tool to send the command, the instrument could receive successfully.

  but, when I start my labview application to use visa control and send the order exactly the same, there is no response.

  I trace the error in my control, there is no error after the send (successful submission) command, but the instrument has no answer.

  I do not know baud rate and other configuration is good, why the device cannot answer?

  BTW, I try to use HyperTerminal to send the same command, the instrument can answer too...

  AJMAL says:

  BTW, I try to use HyperTerminal to send the same command, the instrument can answer too...

  If you mean it is in the hyper terminal to work?

  I would say it is probably a Yes.

  The most likely cause here is a matter of simple termination. Most of the series commands must end by one or more characters. It varies depending on the instrument to the instrument, but it is usually a carriage return. You will need to check the programming of your instrument manual to determine what is this character and add this character of the chain of command. Individual character constants are available in the palette of the chain, the bottom row.