Find visa byte

Similar Questions

• Find VISA resources

  I have trouble finding VISA resources properly. I have no problem detection instruments that are connected on the GPIB, but after that they have detected once LabVIEW is convinced that they are there for ever more, even if I unplug and disconnect the device! The only way that the list of the connected instruments is reset completely out LabVIEW and restart it. Why is this?

  I'm using LabVIEW 6.1 (but who can not make a difference) and I attach a VI with two ways to detect if one of the four possible instruments are connected. The Subvi is used to give a command to one of the instrument, and it is able to return an error if the instrument is not connected, regardless of the situation. How can it detect the instrument as expected, but the other methods not?

  In this VI, I need detect how much, if any, and that out of four possible instruments are connected. Simple, but amazingly difficult!

  Any help please?

  James

  Well, now that you say is starting to make a little more sense. I misunderstood what you were asking before.

  Jeff Bohrer wrote: what is the selection if you look at "tools > Options > various... > automatically close VISA sessions?

  Help: "automatically close your left VISA open sessions by the application when the first level VI becomes idle. This check box is cleared by default. "This was added at some point (don't remember when), and the default value is True. It caused a lot of sorrow and complaining from users (I was a), so NEITHER changed the default value false.

  As Dennis has pointed out, there is a distinction between the resource and the instrument. When you perform an initial analysis resources will be created. There is no mechanism that automatically detects that an instrument is no longer there. In fact, when you scan for instruments of MAX, she sends * IDN? queries to find instruments. So, you must check for the presence of an instrument by actually trying to talk to her.

• How to find the bytes in hexadecimal string start

  Hi, I'm a freshman for Labview.

  I want to find the beginning bytes in Hex string. For example, 12 1A 00 34 1A 01 23... How can I get my data of 3 bytes of the hexadecimal string which starts at 1 'a '?

  Thank you for your help.

  You will need to provide more information. You have a string that has values of bytes like this? In other words, you have the control/indicator string value "hex display mode", and that you have provided, that's what you have? Or, you have the string in normal view?

  If it is in hexadecimal display mode, then use one of the functions of the chain to get a subset of the string. Have you looked in the channel palette?

  If it is in normal display mode, then you must convert all 2 characters to hex values.

  To learn more about LabVIEW, it is recommended that you go through the tutorials and look over the material in tutorials the NI Developer Zone Learning Center , which provides links to other materials and other. You can also take a course online for free.

• Output of find VISA VISA open resources

  VISA find resource returns an array of strings. When I have one of the elements of wire to VISA Open there is a point of constraint.

  Is there a function which should be used so that the point of constraint goes?

  Try attached.  You can ignore the point in this case as well.

• Anyone know where to find step byt step instructions for the use of converter for resize volumes?

  I've already converted a physical server to a virtual computer, and now, they decided to shrink the C:\ partition. Can when I get the instructions?

  I would like to start here - http://www.vmware.com/pdf/vsp_vcc_41_admin_guide.pdf - departure: page 32

  If you find this or any other answer useful please consider awarding points marking the answer correct or useful

• Visa erroneous zero byte in reading series

  Hi all

  Trying to debug a problem that I have with a Labview2011 VI and the USB-485/2 device.

  The installer has been simplified to get the wire from port 1 to port 2 in a 2wire-auto configuration. As described here:
  http://digital.NI.com/public.nsf/allkb/D5CC369B3E3E6F0586256D1600563245

  and here:
  https://decibel.NI.com/content/docs/doc-4169

  Port 1 sends a message of 8 bytes by using visa / writing then begins a visa-reading of 8 bytes. (timed content in a loop of 10 Hz)

  Port 2 is configured in a single loop using the wait for event visa byte, then visa-read 8 bytes, connected directly to visa / entry.

  For 1 Port data transmitted, the data received and read visa error code are recorded on the disc.

  The success of installation passes are receives data without loss... so the back loop work...

  However! Occasionally, another zero byte is read from visa-reading the port1.

  Almost all the code read visa back operations "1073676294" port 1 (the number of bytes transferred is equal to the number of entries requested. More data may be available) which is very good. Even if sometimes the error code '0' is back (operation completed successfully). This "0" code seems to be associated with the extra byte in the receiver.

  This causes a problem because it throws the mismatch scheduled application command/response pairs.

  I tried many tariffs buad, visa-read timeouts and transmit frequencies, the problem remains. Adding a visa-flush buffer prevents the error from reproducing, but won't stop him intervened and upsetting the logic of command/response.

  Any ideas would be appreciated.

  If you send real binary data (which it looks like you are), you should have the off stop character.  Remember that reading VISA will be completed when the FIRST of the following: the desired number of characters is read, the character of endpoint found, there is a timeout.  So if there's a 0xA in your data, which will stop the read before that you would like it.

• Finder will not find

  I write a lot of documents word, and quite often need to find paragraphs etc I have already written, it works fine on my MacBook, I must type in relevant Word Finder ever, I didn't find that and it would come with all the documents containing that Word. I recently bought a second hand mac book air and it won't let me do that, I type in the word and it comes up with nothing, I tried several times with different words and nothing coming.

  Any ideas how I can fix this please.

  Compare the settings of the spotlight in system preferences: Spotlight: search results on two Macs. I have all these selected and regularly find words in Word documents. On older MacBook Air, you may need to add your boot drive to the section of the privacy in the first sentence, restart Mac and let re-index your boot drive. It's the spotlight.

  In the Finder, visit the view menu, and then choose Show path bar. Nothing will be visible until you click a file in the Finder window, and then it will show the path to this document. In the search window, enter kind: word AND "word" where the word is your search term. This will display all documents in word with this expression in them.

• How to find number of disabling modem com port if I know the name of the interface of the modem?

  Hello

  I know that if I see a modem device in Device Manager, I can do a right click on it, go to properties, then click the Modem tab for the port com for this modem device number. But how can I do deactivation in Labview? I hope that I can search by the name of modem which is known to me and then retrieve the com port number in labview code. I tried the Resource.vi find visa, but did not get something useful. Anyone has any experience on this?

  Thank you

  Spring

  
  

• in VISA READ timeout

  Hello everyone,

  I am in training course of end of study and my mission to carry out an automatic test bench.

  Not being an expert in Labview and ASCII language and that no one in the company is now capable of answering my question, I turn to you because you're the only who can help me please.

  United Nations instrument of I Doi to communicate en RS232C with SEFELEC DMG50 + not the DATASCHEET (page 85) is attached via Labview program that I found in the examples of the United Nations and works not bad (as an attachment also), EXCEPT THAT at the time or I send a request with a response to return like e.g. IDN (* IDN?) Application solutions), the referral program an error timeout-1073807339.

  As I understand it he tells me that he doesn't have enough time pour answer. But he wrote the answer in almost all still...

  The question I ask myself.

  1 - Why he answers while it displays a Timeout

  2. is this a problem of parameters (for me everything should be fine)

  3 - Can you tell me if I have chosen my flow control and the character XON and XOFF parameters

  I will be very grateful if someone can help me solve this problem because I galley not bad on this thing

  Thank you

  solved

  Thank you very much, because both of you (Albert.geven & SAMUEL_NIF) has been essential to clear the timeout error. For this I have

  1. I separated VI Write and Read VI and made a VI wait... because VI Read needs time to respond as you said

  2 - I also used a property of node (VISA bytes to the Serial Port)... because it gives a necessary shot for reading

  the new program is attached to understand more

  Thank you

  Auto

• VISA communication problem

  Hello..

  I interfaced with a simple ADC from my microcontroller and the microcontroller to the PC via the port series.

  I'm changing the entrance to CDA using an analog POT.

  I used the VISA in LABVIEW2010 to get the data from the serial port and display it in a waveformchart.

  But I have some problems to do. IT (LabVIEW) receives the data correctly in an instant and missing another now, sometimes, I get part of the data. Also I get a FRAMING ERROR also occassionly.

  I send the value of the ADC as 3decimal numbers (0 - 256 as my ADC is a 8-bitADC) followed by a linefeed (0x10) from my microcontroller for each sample. I have strength give everything behind except for the ADC conversion time.

  Configuration of VISA:

  Baud_rate:9600

  Data_bits:8

  Parity: none

  Stop_bits: 10:1

  I've attached my vi file too.

  Please help me, thanks.

  You have several problems and each of them have been explained in many discussions.

  First, the VISA init and closing belongs outside of the loop. Then, remove one of the constants you for the init function then simply right click on the entries to the VI and select ' create Constant. You will get the correct data type and eliminate the red dots of coercion. Thirdly, if you send 3 ASCII characters (i.e. ASCII ' 123'), then simply set the VISA for 3 bytes read and jump the VISA bytes to the Serial Port. Fourthly, an 8 bit DAC is 0 to 255.

• VISA serial port automatically configures scan of the available serial ports?

  I am using a VISA set a serial port to open a connection to the serial port, to enter data, make some manipulation of array and display it.

  My VI works perfectly until what I have build in exe and transfer it on a laptop with a USB converter to port series (as the laptop does not have a serial port).

  Windows allocated the converter to COM9, but I do not see it in LabVIEW.

  Do I need to use something like 'Find VISA resource'? If it does find something how can I change the name of resource VISA?

  I have attached a screenshot to give you an idea of what I'm doing.

  There is absolutely no reason to use all of this code. The original order of resource VISA name should work just fine. Have you installed the runtime VISA on the laptop? If so, did you also install MAX, so you can check the VISA resources on the latptop?

  In addition, since an exe file will run automatically when opening, have you provided a mechanism for a com port selection until the program begins the acquisition of VISA?

• size in bytes of a number (3)

  Hello
  
  I'm using sql * plus, oracle 10 g, windows 7.
  
  How can I find the size in bytes of number (3)?
  I found a formula to calculate round ((length (3) + 0)) + 1, but I do not know how to generate the result.
  
  Forumla comes from http://download.oracle.com/docs/cd/B19306_01/server.102/b14220/datatype.htm#i16209 > internal digital
  
  Published by: sweetiePie May 17, 2011 03:20
  
  Published by: sweetiePie May 17, 2011 03:21
  
  Published by: sweetiePie May 17, 2011 03:23

  How do i find the byte size of number(3)?
  

  Use the vsize or dump on this column function.

  -------
  Sybrand Bakker
  Senior Oracle DBA

• series asynchronous message read

  Hello world.

  I have the message function device. I don't know when the device will send the message, so I didn't know how can we establish the VISA playback function to read range of the device (because it only reads data, which are activated to the serial port buffer). Maybe it can be made using VISA bytes to the port in while loop, but I'm not exactly sure how. Can you explain it to me? Or do you have another solution? Thank you for your help.

  Hello

  I reworked the basic reading and writing example series, just to give you an indication of programming. Also remember that then reading series buffer, you do not need to read all the content. Read the number of bytes that you need. The buffer of the series is FIFO. If the older content will always be first in the queue to read.

  My example is a bit simple, and I didn't test it but should work. Discover the queues and the authors of the notifications (in the finder in the example) to advanced programming techniques.

• How to put back the Documents folder in Finders?

  I accidentally slicked and swipped the 'Documents' on the right in Finders folder and it disappeared.  How can hand the Document folder in finders?

  Have you tried to drag the Documents folder to the sidebar of the Finder?

  Have you tried (in the Finder) visit the preferences-> sidebar and the option for the Documents folder?

• Ports are sometimes 'COM' and sometimes 'ASRL.

  I have a piece of code that search Active COM ports, tests for a connection, then uses this port.  The problem that I am running is that I am using this code on several laptops with Windows7 and for some reason any, that some laptops list ports COM1, COM3, etc, while others list people like ASRL1, ASRL3, ASRL5, etc.

  I did not yet understand why some use different nomenclature, but it throws out of my COM port program  I don't want the operators having to use a menu drop-down and select the port that this test must be entirely automated.

  Any ideas on how to solve this problem?

  Com references are aliases. Asrl references are canonical names. You can filter the resources to find visa to return either. I got what you use for your list?