find idle computer time using labview

Similar Questions

• ID card of measurement computing DAQ using LabVIEW

  Hello

  Use card 1608FS USB with LabVIEW. I'm trying to find a way of checking the connection card when my application is initialized. I tried to use GetBoard.VI, but it gives the same answer, even if I remove the card in the port. Any idea on how to detect if the card is connected or not?

  Thank you

  Anil

  Hi Anil,

  Underlying InstaCal driver of MC allows logic card numbers to assign 0 to 99.   You can call GetBoard.VI for each number of the logical map that you anticipate may be used, which (as you pointed out) will get the name of the Board of Directors of InstaCal.   If the returned string is empty, the error returned is 1, then there is no Board configured in InstaCal for this issue of the logic board.   However, as you said, if the physical Board is not present in the system (like a USB on Board having previously set in InstaCal but currently unplugged or not powered, you will get the error = 0 and you will always have the string name.

  So, to check if a card is really installed in the system, since the MC driver has no function equivalent to "is actually this Council?", you should try to perform a physical read to the Commission, then call TIN.VI (temperature), AI.VI (voltage) or DIN.VI (digital). If the returned error is = 0, then the Council is present.  If the error code is 1, the Council is not present.  If the error code is another number, then the test is somehow invalid (for example, ask to perform a function that is not supported on this board model, or on a port that does not exist on the map or the channel number).

  Brent

• Register the event on the target in real time using LabVIEW 2012

  Hi all,

  It seems that LabVIEW 2012 RT does not support user events. Screws are not in the range of function and the help of LabVIEW says that it is not supported. In LabVIEW 2010, everything seems fine.

  That's happened? We need this feature.

  Thanks in advance.

  Hello

  Thank you very much. We will use this workaround, which is not a lot of work if you know what to do. Develop a VI on workstation and the execution of switching left target to the low edge also implements the correct block as well as feature diagram objects.

  This can be fixed in the next patch-Patch because a lot of users could by irritated by this behavior?

  Thank you

  Tyler

• How to find what processes are running on my computer and use it from memory?

  * Original title: find running processes

  How to find what processes are running on my computer and use it from memory?

  You can press Ctrl-Shift-Escape to see which processes are underway and those who is using memory (and how much they use).  Although the memory usage is not as important as how they use lots of CPU, which is what can make your computer slow if there are too many programs use the CPU at the same time.  For memory, even if she says that he uses a lot, an inactive program ' pages on "memory to the hard disk and it frees room for other programs to use, is not as important as the CPU generally (unless you are very very low on memory).

• using the module time real Labview in RTAI

  Hi all

  I want to use the module time Labview in RTAI real for real time due to its open source applications and very good performance. is it possible to make this work?

  If this is the case, can anyone introduce a single study of case or something similar to this?

  Cecile says:

  Hi all

  I want to use the module time Labview in RTAI real for real time due to its open source applications and very good performance. is it possible to make this work?

  If this is the case, can anyone introduce a single study of case or something similar to this?

  I don't think it's possible for anyone outside of OR. LabVIEW Real-time supports this time only Windows as host and as a target only material of National Instruments with specifically targeted OSes or the Pharlap ETS system on x 86 systems with hardware specific enough. Using RTAI as target OS for LabVIEW Real-time applications requires first a few changes on the time plugin real LabVIEW to support this new platform.

  None of the files in time real LabVIEW also created for either platforms OR running VxWorks or OS Pharlap, Pharlap ETS system woud be able to be deployed to a system RTAI, because they are not compatible. In the first place, you'd have to port the bunch of shared libraries that make up the time target real system running LabVIEW on one of these goals to your RTAI system which is in fact a whole new platform of LabVIEW you can create with a little effort from the LabVIEW source code. It's not really impossible for OR as most of the code LabVIEW is written platform completely independently, but it would be a combination of the parameters compilation for course LabVIEW Real-time, with the settings to produce time targets real LabVIEW VxWorks with some additional settings of Linux. Yet, it would be by far not trivial and some parts are actually hardware specific drivers that must be worn too and limit the possibilities of what RTAI material could serve even further. In short not something that would make any commercial sense NC because they invest a lot of resources with no opportunity to sell additional hardware.

  And hell freezes over up front release of NI LabVIEW source code in any form which gives access not - OR used to it!

• 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.

• How can I display the time of the data stored in a file using labview?

  How can I display the time of the data stored in a file using labview?

  Hi Matt,

  I think that we will need a little more information as to how you capture the data, what data you capture, etc.

  If you capture a waveform, is to extract the time data waveform which includes the t0 and dt values, so you can understand the time stamp of a specific data point as in the image below.

• Determine what are the cards OR are installed on a computer using Labview

  Hello people,

  I hope that it is a matter appropriate for this forum.

  Is there a way to programmatically determine the cards OR are installed in a computer using Labview?  We have a limited number of test for material Exchange computers sometimes.  I would like to write a collection of Labview applications to know what hardware is installed and then perform some configuration based on the hardware settings.

  Best regards

  Chris

  Hello

  Looks like than what you may have here: complete peripheral extraction and list of channels dynamically.

• Programming computer laptop Wifi using Labview

  Hi dear all, can someone guide me how can I program my laptop computer Wifi module to send and receive data through Labview programming. What tools or drivers should I me take his Express or other screws are visible in Labview. If possible, some codes an example or link to that knowledge base. This will help me understand the concepts of programming Wifi. Thanks Zdzislaw qureshi

  Hi dear Dennis Knutson,

  I tried screws from TCP/IP and to understand. But how can we make our PC Access point using Labview? Are there any specific screw init or some additional toolkit required to do this. Actually I want to PC to become the hot spot to be connected. My app will then scan him in serach and then sign in to do some data send and receive actions. You have little help for me in Labview.

  For the wifi connection, I need to use the method of connectivity to Microsoft. How can I do this by Labview. I understood how to put IP LAN to detect in Labview only once I'm connected to the other PC via LAN wireless and wireless.

  Thank you & best regards

  Zdzislaw qureshi

• Each time I click on a folder, search companion will appear. I am interested in DISABLING research or travel companion down on the pop-up menu, or at least, put it further down in the context menu. How can I do this? My computer not used to do this.

  Each time I click on a folder, search companion will appear. I am interested in DISABLING research or travel companion down on the pop-up menu, or at least, put it further down in the context menu. How can I do this? My computer not used to do this.

  Doug Knox fix - http://www.dougknox.com/xp/scripts_desc/xp_folder_open.htm
  Search Companion starts if you double-click a folder or computer drive - http://windowsxp.mvps.org/searchwindow.htm MS - MVP - Elephant Boy - Don ' t Panic!

• How do you find the last time that an address older Windows Live Hotmail has been used if you don't remember the password?

  How do you find the last time an old hotmail address was used... especially if you can't remember the exact password?

  original title: old hotmail address

  How do you find the last time an old hotmail address was used... especially if you can't remember the exact password?

  Good enough if you can't on the account and you can't prove it is yours in order to regain access (via password self-service reset, etc)-then you won't know anything about the account.

• How many times can I reinstall windows 7 on the same computer by using a product key?

  OT: Reinstall Windows 7.

  How many times can I reinstall windows 7 on the same computer by using a product key?

  How many times can I reinstall windows 7 on the same computer by using a product key?

  You can reinstall on the same computer as many times as you want.

  Eventually you may need to activate by using the telephone option.

  Concerning

• waveform, with an average of results using labview to O-scope

  Hello fellow engineers! I'm a first-yeargraduatestudent in CHEE at the University of Houston. Basically, I know nothing about labview. I am trying to program an application that looks like this - I collect a waveform of the signal of O-scope. This waveform does not change its characteristic shape. I need to find the wave form average of waveforms of N (100 for example). Thus, the slight changes (or noise) in the feature of form during the period mustbeaveraged out and I need to have a resultant waveform that represents the average waveform over a period. So, basically, I'm collecting the wave several times (for example 100) on a single period. The O-scope that I use now is Tektronix TDS 2024 B. It communicates with the computer via USB. The version of labview is 8.5. For now, I am able to communicate with the computer using our o-scope through labview. I already downloaded the driver of instruments of your Web site. It turns out that the program can give me only the average result I can get directly from o-scope manually. I need to have more say on average (100) using labview. I wrote a program that relies on the instrument driver that is downloaded on your website (for loop part is average, the waveform). The program that I modified and an instrument driver are attached. The program cannot be fully open, if the driver is not put in the right place in the labview (under lib inst.) When I run the program, the average waveform does not appear on the front panal and signal waveform file is not saved correctly. Is there someone can find where I did wrong and it develop for me? Because I barely know Labview, it will be even better if you can add an image or program that you have changed. I'm waiting for your creative ideas.
   
  With the best regards,.
  --
  Weiye

  
  

• How to transfer files from PC to PC via a serial port using labview

  I need to transfer files (.txt, .doc, .xls) from PC to PC via a serial port using LabVIEW. Is it possible to transfer files, if so how to transfer?

  Yes, it is possible to transfer files with the serial port using LabVIEW.  The files are just collections of bytes and the serial port is good enough in the expedition of the bytes from one PC to another.  You must connect the ports series with a null modem cable.

  First, take a look at the example of serial communication.   In LabVIEW, go to the Help menu and select «Find examples...» ».  From there, you can search for "serial" or navigate to hardware input and output > series.  Select «Write series base» and Read.vi  Try this example to gain confidence on the serial communication methods.

  Then it's time to learn how to read and write files.  For this, the examples might be somewhat confusing as they deal with files that are presumed to have data of a specific type in them.  I would recommend just familiarize yourself with the functions in the file e/s palette.  Specifically, familiarize yourself with the following functions.

  1. Open/create/replace file - on the side of your destination, you will need to create the copy of the file you are trying to transfer
  2. Close the file - when you're done reading or writing to a file, you must close it.  It cleans the memory used and finalizes write operations that are still floating in the write buffer.
  3. Read a binary file - is the best way to play a file when you don't really like what type of file it.  In your case, you just want to get these read bytes and sent so they can be written down instead of destination.
  4. Write to a binary file - next to the destination, is what will store the bytes in the file that you created with the number 1.
  5. Size of the file get (under the range of the advanced features of file) - you need to know how big the file is, so you know when you are finished.

  OK, so once you are able to create files byte write and read bytes from existing files, you can move forward.

  I suggest the basic method is to have the user specify a source file on the source PC, and a folder on the destination computer.  Then find the size of the source file using the number 5.  Divide this number of size by the number of bytes that you want to transfer to the times.  The series pads are usually around 32 k (if I remember correctly) in order not to exceed that.  Now start to send data by reading a number of bytes and this string output wiring to the feature of writing VISAS.  On the side of destination, you will want to monitor the serial port for bytes and read when they arrive.  This string of yarn to the writing of the function of binary file to add them to your destination file.

  This is the basic outline of how to do it.  He needs to not to overload him write and read buffers on the serial ports.  Initially, you can use delays on the side sending to make sure that the side reading has enough time to digest.  To make things faster, you can bring in a control of flow.

  If all that sounds a little intimidating, there are there Alliance member companies (such as the automation of PrimeTest) who can write this code for you and even provides a turnkey for you solution.

  Happy wiring,

  Dan press

  Certified LabVIEW Architect

  PrimeTest Automation

• Deal with failure when using LabVIEW 2011 and DSC MODBUS communication

  I'm currently reading from operating records a PLC with MODBUS/TCP. I confirmed that the PLC will update the values and in response to a MODBUS communication correctly by using a third-party program called Modbus Poll. However, when I try to query the PLC using the LabVIEW shared variable engine, I am unable to read the values of the same addresses that I consult with Modbus Poll.

  My installation is simply to a PC directly connected to the controller via Ethernet without a router between the two. I'm using LabVIEW 2011 SP1 with the DSC module.

  I opened the Manager of distributed systems OR to display the State of all variables in the Modbus Library that I created, and I noticed that the ILO CommFail permanently the value 'true '. All other variables with a 'read' access mode signal "failure of process". I tried to restart the process and stop and start the local variable engine without success. I also restarted my computer several times to see if any services did not exist, but this does not appear to have solved the problem.

  Finally, I resorted to listening to communications on the network card I have the PLC connected via Ethernet using Wireshark and found that while Modbus Poll communicates with PLC, number of MODBUS and TCP packet is sent and received. However, when using only LabVIEW or the DSM OR communicate with the controller, there don't seem to be any communication on the network card.

  Something that may be interesting to note is that I could communicate with the PLC and to read values with the DSM just once, when I understood everything first what address I should be reading of. All of this has stopped working shortly after. Prior to this, 'CommFail' was not generally set to 'true' with my current setup. Thinking it was my firewall, I have since disabled my firewall, but this seems to have had no effect on the problem either.

  Any help on this would be appreciated.

  So, I thought about it. It turns out that the IP address of the server i/o MODBUS must be set to the address of the MODBUS slave, not the local computer. The address of the i/o MODBUS server is defined by the navigation in the Explorer window projects, expanding the variable engine shared library for MODBUS and right click on the server MODBUS (for example Modbus1) item and select Properties.

  In addition, the addresses seem to be shifted by + 1.

  Thanks for the tip so.