VISA RS232 read gel-> LV stuck on "reset vi"-> VISA resource inaccessi

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• visa resource name function

  Hi good day to everyone!

  I am a beginner to LabVIEW, and currently I'm testing on a single project.

  Store device data in Server series of STS (which has 16 com ports).

  But I need to use 7 series STS server com ports. I need to read that data 7 com ports and save in a file.

  Each com port has a different function (for example the reading of data or display).

  My question is,

  (1) VISA resource name operation function for 7 com ports at the same time to a VI?

  (2) how can I choose different com ports to different functions?

  Kind regards

  Control of resources of e/s of VISA will show you all the com ports you have on your computer.

  So you just need to make 7 copies of that control and the value of each of them to another com port and use for each VISA entry and read the series of functions that you do.  (Have you looked in the example Finder to get examples of serial port?)

• 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.

• visa resources Finder will find PXI-4070

  Hello

  I use LV 2015, 32-bit on windows 7 x 64.  I have an SMU-1065 OR connected to the PCI computer bus.  I have several instruments in the PXI chassis included some switch cards, a scope and a PXI-4070 DMM.

  When I run the VISA resource finder, the result will show me all PXI cards in the chassis (as well as the serial port of the computer), but it won't find the PXI-4070 module.

  MAX shows the map I can run self test and open the interactive panels in MAX I saved (no alias) NAME of the PXI-4070 as "PXI-4070.

  I can also use the DMM OR-DMM pilots very well.

  the PXI - 4070 Max address is: PXI24::15:INSTR

  I must be able to detect programmatically PXI/SMU cards are in my frame so that I can put them up as system in the configuration it is in.  can someone help me understand why the finder resources VISA see the PXI-4070 module and report?

  Hey Reece,

  Have you tried to use the Configuration API of the system NOR? It allows you to programmatically query the hardware on your system. Here is some additional information on the API:

  http://zone.NI.com/reference/en-XX/help/373107J-01/nisyscfg/introduction

  https://decibel.NI.com/content/docs/doc-13216

  https://decibel.NI.com/content/docs/doc-29606

• How a cRIO can access remote systems VISA resources?

  I have a NI 9871 RS485 module on an ethernet 9148 RIO.

  I have also a laptop and a cRIO 9073.

  I can access each of the 9871 serial ports on the computer but not the 9073.

  When you try to access it from the cRIO, I get error:-1073807192, VISA: (Hex 0xBFFF00A8) is denied access to the resource or to the remote machine. This is due to the lack of sufficient privileges for the current user or the machine.

  How the cRIO can access the serial ports of the module 9871 on the ethernetRIO?

  Or how a remote access cRIO visa resources?

  Or how a cRIO can have sufficient privileges to access remote resources from visa?

  Thank you for your help.

  LabVIEW 2010 & VISA 5.1 on pc

  NOR-RIO 4.0 and 5.1 VISA & NI 9871 SERIES scan engine support on cRIO and eRIO

  Hi Woss,

  It is possible that your RIO Ethernet has some parameters of active access which is to prohibit the connection to serial ports.  You can change these settings in a position and Automation Explorer (MAX) for your device by going to the device under remote systems, expanding the category of software under it and choosing NI-VISA.  There will be a tab in the right pane of MAX called Options of VISA.  In this tab, select Server VISA > security to access these settings.

  From there, you should be able to add the IP address of the RIO device that needs to access the VISA on the RIO Ethernet server.  Once you have changed these settings, just click on register at the top of the window and allow the unit to restart.  Let me know if that helps!

• How to create names for VISA resources

  Create a VI to interface with a Tektronix Oscilloscope. Tek drivers all use and transmit handles instrument VISA Resource Name to the format.

  Yesterday, I simply plugged a text string with the characters of text on the Tek pilot and it's happy. String = "GPIB::12:INSTR".

  Today, LabVIEW dislikes this incompatibility of format, and I get an error of the pilot.

  My format of the string looks OK, but I have to do something wrong. None of the tools VISA simplty interrogate the device for his VISA resource name. How to do it?

  Thank you.

  
  

• VISA resources between the loops with the queue

  Hi all

  I am just be familiar with the queues and the producer/consumer model, and I am facing difficulties to pass data between the loops using queues, including data of the type "VISA Resource Name.

  Indeed, it seems impossible to cable "VISA Resource Name" as an entry of the item in the queue, as an output of the Dequeue item.

  These screws can I always try to convert something of this type can accept? Or should I take a different approach and that one?

  Thank you very much for your help.

  Florian

  
  

• VISA resource name strings

  Hello

  I have a control "VISA Resource Name" on my front, according to the guidelines of the attached screenshot, which should automatically fill with the names of all the VISA resources that the PC can see.

  Is it possible to get a picture of these names as strings (via a property node, or other) programmatically?

  Thank you very much

  Dan

  In the schema click Instrument of e/s > VISA > VISA advanced > VISA find resources. This VI returns an array of strings. You can type cast the string in a resource VISA type.

• A control "VISA Resource Name.

  In LabVIEW, there is a control "VISA Resource Name" which lists all the VISA resources, is automatically updated when devices are plugged or not plugged in and has a navigation feature.

  With CVI, you can use NIDAQmx_NewDeviceCtrl () on a control of the chain, but it lists only the DAQmx resources.

  There is another function that I can use to have all resources VISA listed?

  Hey Vix,

  It seems to be the only solution. Here you will also find an example.

  I hope that helps!

  Bye,.

  Licia

• RS232 read series with COM1

  Hello.  I am hoping there is a simple answer to a problem I have.

  I had previously been using the 30 day trial of LabView to begin to create an application for reading data from an output to RS232 instrument via the serial port on my laptop.  I have this based on the base series reading and writing example and it worked great.

  Now, I have purchased the software Labview base, had downloaded the software and activated.  When I open the VI that worked before, he now won't read data from the instruments. -There is nothing appears in the window of indicator text 'string of reading. '

  I checked that the instrument and the connection is fine by the acquisition of data in HyperTerminal - I use the same settings for data transfer in LabVIEW.

  The instrument automatically prints / sends data at specified intervals (I got this game to 1 sec).  Some commands must be written to the instrument.

  I wonder if there is something with the LabView installation that requires the computer to configure ports?  The resource name of Visa in the VISA run configuration is "COM1", as it had been previously.  LabVIEW should be advised as to which means "COM1"?  No, I had to do before, so I doubt little.

  I have attached the VI.  Note that it is rather messy in the deal for the reading series function structure, because I have been playing with how to manage the data.

  Thanks for any advice.

  Indeed I do a repair from cd and be sure that also max is installed correctly.

  Good luck.

• RS232 read and compare

  Hi all, first post so please, be gentle.

  I created a VI that will send an order for and then read in, and a RS232 connection. It then compares the data read with a channel known to give a true or false result. First, it checks the length of the matching strings and then compares the actual string with the known string.

  It's OK, but I can't always guarantee the length of the string and all text will match, so what I really want to do is send the command and then navigate the returned text and look for a specific line in the text. Is it possible, there he prepared everything in advance screw? I looked but miserably failed to find one so far.

  Thanks in advance for any help.

  Jim.

  Use the match pattern or chain of research/Split to search a string for a smaller chain.  They return-1 for the offset is that the string was not found.

• GPIB read gel when running vi without light debugging... (it works with light)

  I have a gpib read that spits out two values to an offset. It is in a loop which is defined by the initial report final and the size of the stage settings. My question is, why don't him freezes reading gpib (or don't disable; whenever I turn on the light of debugging (once it's been run), it "lights" only until the gpib read and nothing else). I replaced the gpib read with visa read, it freezes over, but it saves only zeros (when I can clearly see my system out certain values). Any help would be appreciated.

  * There is a similar topic on the light of debugging and reasoning has been designed to be a race condition. but I don't see how my situation is a race condition.

  Thank you

  Ko.

  It is resolved. It has nothing to do with the program. There was a problem of interference with another parallel machine. Once I got rid of this connection, everything worked like a charm.

  Thank you all for your valuable contributions.

  -Ko.

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