RT-314004 network stream

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• Create endpoint network Stream - pre-allocation for strings

  Hello

  I would use really allocation entry mode to pre-allocate memory on my RT goal. My concern is how to allocate memory for the size of the string.

  Because of the documentation

  "pre-allocate specifies that memory allocation buffer occurs when the end point is created. Wired for the type of input data determines the amount of memory allocated for each item. If a greater element is added to the buffer during execution, the extra memory is allocated dynamically. "

  I understand that if I am wiring constant string to the category data, 40 to the size of the buffer I receive buffer to 40 channels. String but how long? A single character?

  I don't want to let the Manager of memory to run after the creation of endpoint, so I would allow large memory space (for example 40 string, 10 characters each).

  Is it possible to do constant connection string (for example with 10 characters) or I have to put my string specific to the cluster size?

  Another question of trival perhaps, is - it possible to check what size buffer was allocated by this VI?

  Kamil

  Hello

  Here is some additional information on the allocation of memory for network streams:

  http://www.NI.com/white-paper/12267/en/

  My guess is that in order to pre-allocate buffers to not scalar data types, you'll write 'false' elements of the size desired in the stream to read or to flush out these elements "dummy" bevore using the flow in normally.

  Best regards!

• In the Palette of what are endpoints network Stream?

  I adopt/adapt the project for example LabVIEW 2012 in real time to my needs and must create some additional network data stream parameters.  I can't find these on the pallets of façade, or the quick search Drop.  I can, of course, copy one of the code example, or drop down a function of stream network on the block diagram and create a control from the proper flow terminal, but shouldn't this be located somewhere, say in the Refnum palette?  It is also "conspicuously absent" from the help topic "Refnum controls Types", which mentions the other Refnums not on the Refnum palette, but not network streams.

  Suggestion to OR - at the risk of making the Refnum huge Palette (lightened in seen, say, a palette under "Advanced"), put all classes of Refnum NOR in the Refnum Palette, please.

  BS

  Duh - they aren't Refnums, they witness e/s, so they belong on (but not on) the e/s Palette.  The point of origin, that all the that refnums belong somewhere on the Refnum Palette can now be extended to say that all the orders/lights/o Panel belong in the e/s Palette.

  BS

• Network streaming - stand-alone application

  Hello
  I wrote two screws that communicates with network streaming, they work very well. I have applied (Build .exe) and try to run as both standalone applications. They cannot allocate each other.
  Probably, the definition of the endpoint URL should be changed due to construction.
  Please advice.
  Gabi

  Congratuations - you ran in a very subtle point that NEITHER has not explained well!  The 'official' name of an endpoint is:

  neither. DEX://host_name: nom_du_contexte/endpoint_name.  As NEITHER explained somewhere, the name of the Protocol, "ni.dex:", is not necessary.  They also explain that, when the host_name is 'localhost', she also is not required.  What is less clear, is "What is the way?"

  This turns out be the name of the application that runs under the specific end point.  When you run mode development, programming of your application and test it by pressing the arrow to run, the application is "LabVIEW" (technically, it's 'LabVIEW.exe', but also the .exe is not necessary).  As is the way by default (without papers), you need not put it in the string.

  However, when you build executable files, the context changes.  To clarify, I built executables called 'My Host' and 'My Target' (especially if there is no error between the VI, 'Host.vi' and the executable file, 'My Host.exe"instead of"Host.exe").  In Target.vi, I changed the strings to flow to start //localhost:My target, and in Host.vi, I changed the specifications for the URL target to include ": my goal."  Extracts showing these changes are included here.

  Either way, I could not host and target screws you have included in your ZIP file to work in development mode, so I started, taking the host and target live of my examples of LabVIEW 2012 directory, copy them into my LabVIEW in My Documents folder and a new construction project.

  Note that, as written, this version of the code will work only as an executable file (because the way is no longer LabVIEW).  If you want to write a routine that will work in the development and Run-Time environments, simply look at some properties for the Application.  I didn't think to do that until I already wrote this note, that is why this code is not in the previous examples.  However, it is probably better written as a Subvi, as it should be used by the host and target live

  Good luck.  Let us know if this fixes the problem for you.

  Bob Schor

  

• RT-target short-term memory when writing to the network stream

  Hey there,

  I have a program that transfers data acquired from the FPGA to the host PC. RT - VI reads data from the FIFO DMA and writes it to a network stream (BlockDiagram.png).

  Now, I am a phenomenon, that the RT-target load his RAM until it is full and accidents.

  I have no idea why this happens, network flow buffer is empty, all the items are read by the host, and there is no table built by indexing or so.

  Someone has an idea, how I can handle this?

  Best regards

  Hey there,

  I had the problem solved,

  the problem was the buffer of the sender endpoint was too big. Unlike this problem: http://digital.ni.com/public.nsf/allkb/784CB8093AE30551862579AB0050C429, wasn't the growth of memory because dynamic memory allocation.

  It is just the normal speed of the cRIO while allocating buffer. The sender buffer affecting many smaller, memory growth stops at a specific level (DSM2.png).

  It is strange, this use of memory that grows slowly, despite the creation of the endpoint with preallouee buffer, so that its use dark quickly when the VI - enforcement stops...

  Best regards...

• Endpoint creare network Stream Reader Launches error-314350 if the target is executable

  I take a Simple Network Streams.lvproj example provided with LabVIEW 2015. It works very well in LabVIEW environment. Then I create an EXE file using simple flow network - Target.vi of this project and that you try to run the target as the EXE and the host like VI (Simple flow network - Host.vi).

  Step Creare network endpoint Player streams of Simple flow network - Host.vi (runs in the LabVIEW development environment) lance error:

  Error 314350 has occurred to create network Stream Reader Endpoint in Host.vi

  Possible reasons:

  LabVIEW: Another application is already streaming of data to an endpoint in the specified context.
  If you specified a frame name in the name of the reader or writer terminal endpoint, you must specify a name of context not used.
  If you have not specified a context name, you must specify a name unused context by entering the name of the reader or writer terminal endpoint URL.

  I have reastarted LabVIEW and all computer, so there is not another application that could flow. However, the error does not disappear. What could be the reason?

  Thank you

  When you stream from an application, you will need to provide a 'way' in the URL.

  To make your (OK, NIs) examples work in this "context":

  In the Target.vi - to precede the names of endpoint with '//localhost:sns '.

  In the Host.vi - change the IP address control entry target to "localhost:sns".

  Check out the latest entry in this reference:

  Specification of network flow point endpoint URL

  To learn more about network streams:

  Communication without loss with flow network: components, Architecture, and performance

  Note that these examples are only starting points. More code is needed to formulate a robust demand.

  Steve

• How to give endpoint network Stream as input/output for a Sub VI

  I have a program to write data to a stream and to read using the host. In the reader program, I have a Subvi, which I need to pass endpoint network Stream. I'm unable to do so.

  https://decibel.ni.com/content/docs/DOC-15920, in the program in the link, he said he a VI that reads an element in the stream. If you see the screenshot, it connected endpoint network Stream for a subVi.I am unable to do so. A can you please tell me how to do it.

  Thank you

  You will need to place a data network flow control in your Subvi. You then connect the control on the part of the connector.

  You can place a control of flow network as follows:
  In primary VI you take the wire of network flow and right click. Select create - control. Use strg + x for the main control of the VI to the Subvi from the port.

  Then follow the instructions here http://digital.ni.com/public.nsf/allkb/1FA00093A04BFCF5862570920049E482 to connect the control to the connector pane.

  There may be an easier way to do it, but it works very well.

  I hope this helps!

• network stream between 2 virtual machines in the same vlan and host using DVS

  Hi experts, so 2 virtual machines on the same vlan / subnet and on the same esxi host using VDS need to talk to each other, that they get switched by the VDS internally or they headed north for network switches and come back?

  Welcome to the community - it will stay internal to the ESXi host.

• Network of RT - PC streaming

  Hi all!

  I need to ask for your help with network streaming that I am completely blue in this topic. I am trying ro receive data from the RT_Main.vi on my Host_Main.vi (PC).

  I tried to register my computer IP address and sbRIO same IP address, I tried to change the end of the IP address... I entered many Association of reader/writer entered url hoping that it works. I am connected to my sbRIO via Ethernet, static connection.

  Could you explain to me how I did wrong? I get the error 314004. I have read many documents on the from box, OR seen a few examples, but this time they did not help me.

  Thank you for your help

  Dear Owca

  You got the error code indicates the end point you were tring to connect to obtained orphans (in other words, it was created but not yet destroyed). This is the KB describing this problem.

  For now I have only two suggestions:

  1. try increasing the timeout of connections, as Anthony or start RT and PC in the same second, she will then expire.

  2. do not specify the name of Reade on the writer, keep the URL not connected.

  If they do not help, I would say to see if you can run any of the examples given previously. If this isn't the case, it may be a network problem.

  Hope this helps, please ask away if you get stuck.

  With regard to:

  Andrew Valko

  NIH

• Stream network between end myRIO PC

  I want to publish myRIO between variable and real Temp from PC. I try with the network data stream, but I couldn't. who can help me with a simple example and thanks

  Khaled,

  This help documentation shows the basics of what would be on your PC and your myRIO

  http://zone.NI.com/reference/en-XX/help/371361G-01/lvconcepts/usingstreams/

  In this case, computer 1 or 2 will be your myRIO.  There is also a lot more information in the white paper below.

  http://www.NI.com/white-paper/12267/en/

  It's a dump of great information, but if you are able to attach a zipper to a simple project where you try to implement a network stream, we can take a look and maybe understand what could happen.  If you post code also tell us what errors you run in.

• network data stream

  Good afternoon

  I need to send the data generated in the vi, by network data stream.

  The problem is that I found no example that does something similar, and this is my first time using Activex with Labview. Can someone explain me how to send Activex data via the network stream please and if possible help me find a solution to the attached vi.

  I think I need to convert the data somehow after control of the room before using the writing and reading items, I tried with strings and arrays unsucessfully, I really think I'm missing something.

  Thank you in advance!

  Erika

  Erika,

  What do you think?  You try to play an .avi file, a .mpg or what?  IMAQdx has functions that can play video and output files 'images', and you can deliver these images via TCP/IP on another computer using network flow.  Indeed, there are cameras that capture video and output via TCP/IP - IMAQdx is used to capture the image directly from the camera and can view or save a file from .avi (for example).

  You have the Vision Module installed on your system?  In your Palette of block diagram, it will appear under the Vision and movement and should include IMAQ (or IMAQdx) and utilities of Vision (which contains the Palette under files to make the reads and writes of video files).  See if you can use this to display your video...

  Bob Schor

• Streaming between computers on a home network uses the data plan

  original title: streaming

  is it between two computers on the network streaming domestic chew for download?

  Hello

  You don't even have to have internet access to the flow of your Windows 7 network.

  Getting started with streaming media
  http://Windows.Microsoft.com/en-us/Windows7/getting-started-with-media-streaming

  Getting started with streaming media
  http://Windows.Microsoft.com/en-us/Windows7/privacy-and-security-when-streaming-your-media-frequently-asked-questions

  I hope this helps.

  Rob Brown - Microsoft MVP<- profile="" -="" windows="" expert="" -="" consumer="" :="" bicycle=""><- mark="" twain="" said="" it="">

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