Write to serial with VISA

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• play sounds temporary and file of your choice when reading data with VISA functions?

  Hello.

  I read the function of reading data with VISA and then I use as multiple functions to display data on the graph. everything is OK.

  now, I want to play a sound specified (like a song in my desired folder 3s) signal which cross above the specified value range. then after the desired time, it will wait still new cross above the specified value and this repetition of the procedure until I stop the program.

  Data MCU is from and it does not stop when his game system and what system of incoming data for this part (his play) will ignore them pending that outdated.

  I use this for reading data and part VI mentioned which belongs to her is empty and I don't know what I have to do?

  altougth I use an another while loop for his apartment because I want to save time CPU.

  Thank you.

  

  I recommend you do the data type of the notifier a cluster that contains a path and a numeric (double).  The path indicates the reader what file to play.  Digital is the duration.

  Now in a way a bit complicated, but really good stop your second loop.  Do not use a second notification.  Instead, send the normal notification but not use a path for the path in the cluster.  Your second loop can write a check for the path of a not and stops when that is received.

• I'm waiting times tries to access a parallel port with VISA

  I get VISA time-out errors when you try to write to the parallel port. MAX said that the port works and I should be able to communicate with him. Device Manager Windows 2000 also said that the device works. I use writing to the parallel port with VISA example I found on the site of nor. To make it even more confusing (or), it runs on one computer but not another. All software and drivers are the same on both machines. On one who gives me the error of time-out, I am able to write to the parallel port using "accesshw".

  What a coincidence. The computer that I had problems with is also a Dell Optiplex. The pins of wiring together the way that you have specified has solved my problem of timeout. The cable I got with just bad has terminals 11 and 12 low attached as indicated on the page with a link to the code sample titled "with the help of VISA to access the Parallel Port in LabVIEW" I know why the original cable worked with a bridge but not a Dell Optiplex. Thanks for the quick fix!

• How to convert a table control connects with VISA

  As VISA can accept only string buffer, how can connect us a "Control Panel with VISA?

  
  

• HEIDENHAIN ND-287 connect with VISA

  Hej

  I am a student and I want to connect the ND 287 of heidenhain with VISA and labview is it possible?

  
  

• what I have to write the serial number. before you download a driver for my printer?

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  So, you can use the Installation Wizard of HP printer if your using Windows 7, 8 or 8.1.

  If you have any of the above operating systems, connect the printer to your PC via the USB port or connect it to your network.

  Then run the next tool that will detect your connected printer and download the correct driver for it:

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  How can I write a sql with a Union.
  
  
  Select emp_name, emp_no, emp_sal of the emp
  
  
  If show_Less_100000 = "Yes" then emp_sal < 100000 (all values less than 100000)
  
  otherwise the full list.
  
  
  
  Thank you
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  Published by: taty on July 31, 2012 11:28

  SQL> variable show_Less_100000 varchar2(3)
  SQL> exec :show_Less_100000 := 'Yes';
  
  PL/SQL procedure successfully completed.
  
  SQL> select  ename,
    2          empno,
    3          sal
    4    from  emp
    5    where (
    6               :show_Less_100000 = 'Yes'
    7           and
    8               sal < 2000
    9          )
   10       or nvl(:show_Less_100000,'No') != 'Yes'
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  ENAME           EMPNO        SAL
  ---------- ---------- ----------
  SMITH            7369        800
  ALLEN            7499       1600
  WARD             7521       1250
  MARTIN           7654       1250
  TURNER           7844       1500
  ADAMS            7876       1100
  JAMES            7900        950
  MILLER           7934       1300
  
  8 rows selected.
  
  SQL> exec :show_Less_100000 := 'All';
  
  PL/SQL procedure successfully completed.
  
  SQL> select  ename,
    2          empno,
    3          sal
    4    from  emp
    5    where (
    6               :show_Less_100000 = 'Yes'
    7           and
    8               sal < 3000
    9          )
   10       or nvl(:show_Less_100000,'No') != 'Yes'
   11  /
  
  ENAME           EMPNO        SAL
  ---------- ---------- ----------
  SMITH            7369        800
  ALLEN            7499       1600
  WARD             7521       1250
  JONES            7566       2975
  MARTIN           7654       1250
  BLAKE            7698       2850
  CLARK            7782       2450
  SCOTT            7788       3000
  KING             7839       5000
  TURNER           7844       1500
  ADAMS            7876       1100
  
  ENAME           EMPNO        SAL
  ---------- ---------- ----------
  JAMES            7900        950
  FORD             7902       3000
  MILLER           7934       1300
  
  14 rows selected.
  
  SQL> 
  

  SY.

• Problems write in I / O with VISA series (low speed of the program being recorded)

  Hello! I've been monitoring voltage speed of the serial port 230000 baud / s. It is fast and accurate, but when I want to save this data to a tmds, xls, txt file, reduce the speed of the program and buffer overflows in series, which reduces the voltage rate control information. I tried on 2 PC with four core processors. I think that it is not because of the PC.

  Because of what it might be?

  File IO is SLOW.  You must compensate for that somewhere.  Look at the producer/consumer.  The idea here is to have a loop that simply reads the serial port (as fast as it should) and use a queue to pass data to another loop to process and save to disk.

• VISA from read/write to serial port - unable to implements several orders of writing!

  Hello

  I'm new to Labview and I'm reading from a pressure through a virtual serial port USB sensor. I am able to read the port when you use HyperTerminal

  The code sequence that I should write to the port in order to obtain measurements using hyperterminal is the following:

  ' *' (2A hex)-online start and the responses of the port by asking 'Command', I should then enter

  FF-online measurement select the port must ask the 'mode', so I should enter

  0 has-online measurement of high resolution mode and it was then that I should start receiving action.

  The port is always answer by errors when I write the start command or the FF one. I tried to establish a sequence stacked to write the three commands then read the port, I added some delay between the three of them, but it does not work.

  Now I made really simple and removed the stacked sequence and just put the three commands one after the other and try to remedy not to not on the code.

  I'm really stuck at this point, could someone help me please? I read a lot fo articles on the forum, but I can't solve this problem

  Thank you

  I have attached my VI and the SCP1000 documentation (I can provide other versions of my demo if necessary)

  The reason for your problem is a frequent misunderstanding even among experienced programmers. Take a look at this thread

  http://forums.NI.com/NI/board/message?board.ID=170&thread.ID=417750

  In your data sheet, then they return codes like 0xFF or 0x0A so has a single byte of average value. Then you in your-active code constant writing FF\n is so this equal to values in format hexadecimal 46460A and your instrument do not understand. But it will include FF0A. In order to solve your problem, you would type in \FF\n in your '-' chain helped codes. Remember too, if you type in \32 it will be converted to character 2 this being 0 x 32 50 decimals and code ASCII 50 is equal 2

  Take the time and change the display format of string between '-' display and Hex display and you will see the difference

  Hope this helps

• VISA write error 1073807298 with mbed

  Hello everyone. I use the mbed card for my new project.
  I'm not familiar with the mbed, so I tried to do a few led flashing with labview.

  I get the error message 1073807298.

  I tried hunting VISA and VISA defined I/O as recommended messages previous but has not solved my problem.

  Can you help me please?

  Hi mejrissi.chiheb,

  Have you seen our paper that deals with this error?  I think he should provide more details on why you see this behavior.

  Best regards,

• Serial port visa and while loop

  Hello

  I am trying to acquire data of a device through serial communication. This is an RS232 interface. I use a port of visa and I know open and close the port of visa again and again while the program is running is bad style. So, I trieed to use a while - excluding the Visa open loop and nearby (see the attachment of a second, program 2). Unfortunately this work of isn´t program and I can´t find the bug. However the first attachment (program 1) works properly (except that the speed is maybe more low). Sombody could me to get the second work programme.

  Thank you!

  Best regards

  Soffi

  What you need to do is to add a register to offset for the name of resource VISA and error. See attachment a screenshot.

  I couldn't find this anywhere in the examples of NEITHER. (This one is based on the basic series example write and read vi.) When I started with LV, I asked tech support how to do this, and they told me. I WISH THEY WOULD SHARE THIS TECHNIQUE WITH USERS IN THE UNITED STATES!

  I hope this helps. (I can reach the vi if you wish.)

  Ed

• Can't see the terminal emulator port after all control with VISA

  Hello

  I created a LabVIEW VI to control cycle to PWM channels on a microcontroller FRDM KE02Z reports. The microcontroller, programmed in CodeWarrior, is set up to receive an an input of the terminal string and break it in two parts (the channel name and ratio), which are then applied to the PWM. The code works and I tested with the 2.9 Termite and a Logic Analyzer before ordering through LabVIEW. The problem I had, though, is that I have to completely close LabVIEW to see the port on the new Termite and vice versa.

  Previously, I had problems with VI after I something else in it, even a VI almost identical, more open as he was using the same port. I get errors and be unable to get my VI to work again unless I restarted LabVIEW. I was able to fix by adding a VISA flush the IO buffer according to a discussion earlier (http://forums.ni.com/t5/LabVIEW/Timing-issues-with-Serial-Read-Write-can-t-achieve-terminal/m-p/2636... once the configuration of the Port series and at least now I can jump between the screws I am still unable to see the port jumps between LabVIEW and termite, unless I close one;) Close VISA and the closure of the VI are not enough, I must close LabVIEW himself. Is it possible to achieve only within the VI? For example using a VISA or VISA clear Flush at the end (after closing VISA)? If Yes, what is the difference/preference between them?

  As I mentioned previously, the VI is functional, but I would like to know what is happening for future considerations. Would appreciate any advice.

  Hope to hear from you,
  Yusif Nurizade

  You have not wired resource VISA through the stop event name so it doesn't close anything.

• Can not read the serial port VISA without MAX

  Hello

  I'm trying to build an application that will interface with a Black Cat Systems GM-10 radiation detector.

  The app works fine on my computer (with the full development system OR) but when I install it on another computer, without LabView, the application cannot see the serial port!

  I checked that the driver is installed correctl and Windows can see the device, but when I run my program, he can't seem to access the serial ports.

  I then tried to install MAX on the second computer, how the application worked well, but as I install this app in other places, I don't really have the ability to install MAX everywhere (software must be autonomous).

  Any help would be appreciated!

  Z

  I would have joined the project file, but the forums seem to not want to allow me to download that big of a file.

  What version of LabVIEW are you using? With 8.x, the installer is very able to install the runtime of NI-VISA and MAX. If you are using an older version of LabVIEW, there is an option to include the series VISA support. Install just MAX will do nothing to make the available ports. This is the VISA that does this.