Using cin node in labview error happen

my name is Juan Chen , I wish to use cin node to calculate crc check code in la view. I use an array as input and a unsigned word as output. when I use while loop, error not enough memory or the memory can only read happen. what is the reason,please.

how to use the call library function node ? in vcplusplus6 environment , if I only do rebuild all that can generate a dll, and don't use command to convert to lsb file. could I need add files cin.obj, labview.lsvb,etl to the project ?

Similar Messages

How can i call a DLL file using invoke node from labview?

I cant call a DDL function using call library function.so plz tell me how to use invoke node and call DLL using invoke node
Please Mark the solution as accepted if your problem is solved and donate kudoes

Please stay in the same thread.
- Cheers, Ed

CIN node executes slower in LabVIEW 7.0 then 6.0.2

I have a VI that uses a CIN node to access a digital camera, recieve viewfinder data and return the data. This data is in turn displayed in a picture control, creating a real-time display on the front panel that shows what the camera is seeing. The whole process worked flawlessly in 6.0.2, the frame rate was fine. I recently upgraded to 7.0 and now the same VI runs a lot slower and the frame-rate has significantly slowed down (a drastic drop to about one frame per 5-10 seconds). I have watched the execution of the problem and have narrowed the problem down to the CIN node. I am wondering if anyone else has a solution/is experiencing the same problem. Any help will be greatly appreciated and the giver of such - worshipped
for generations to come.

Nevermind, found the answer. The CIN node wasn't declared to be "thread-safe" which caused the poor performance. All I had to do was add a snippet of code into my source code and the VI works like new. The code is available in the "Using External Code with LabVIEW" manual.

Can I use CINs whit LabVIEW RT?

I need use Code Interface Node and Call Library Function Node with LabVIEW RT. Is it possible?

LabWindows/CVI 6.0 makes it possible to create DLLs specifically intended for use in LabVIEW Real-Time. To do this, go to Target Settings. Under Run-Time Support, there will be a new option for "LabVIEW Real-Time only". What will happen now is that when you build your DLL it will check that you are not using any unsupported functions. You can then take that DLL and call it from LabVIEW Real-Time.

How to use matlab program in formula node in labview?

hi,
i've got one equation of voltage regulation. so i did create program for that in matlab.and want to use it in formula node in labview.but i don't know how to do that.can someone please help me for that?
regards
bhavin

If you have already written Matlab code it is easier to import it straight into a Mathscript node. If you use a Formula node you need to translate m- syntax to c-syntax which may take longer. Note that the Mathscript node
may not support all the functions you used in Matlab so you may need to replace them with native LabVIEW functions. If you want to add inputs/outputs in your program you can just right-click on the border of the node to do that.
These structures can be on the block diagram under Programming>> Structures.
KostasB
NI UK Applications Engineering
Message Edited by KostasB on 05-28-2008 08:39 AM
Attachments:
mathscript-form node1.PNG ‏8 KB

Why asm startwith with + sign? what happen add file in asm tablespace without using + sign,please explain with error no.

Hi folks,
I have one query why asm startwith with + sign? what happen add datafile file in table space,or add disk in disk group without using + sign ,please explain with error no.

hello,
+ sign is to indicate the diskgroup you intended to place datafile. this apply to all database files.
without + sign,will be place in ORACLE_HOME/dbs directory. there will be NO error.
see example here: without using +
SQL> create tablespace test45 datafile 'temdg' size 10m;
Tablespace created.
SQL> select name from v$datafile;
NAME
/u01/app/oracle/product/11.2.0/dbhome_1/dbs/temdg
7 rows selected.
second example: with using + sign to specify diskgroup
SQL> create tablespace test55 datafile '+temdg' size 10m;
Tablespace created.
SQL> select name from v$datafile;
NAME
/u01/app/oracle/product/11.2.0/dbhome_1/dbs/temdg
+TEMDG/orcl/datafile/test55.261.844200359
8 rows selected.
HTH
Tobi
Tobi&#39;s Oracle DBA &amp; UNIX Blog

Are you using the MathScript Node in LabVIEW or the MathScript Interactive Window?

Are you using the MathScript Node in LabVIEW or the MathScript Interactive Window? I am very excited with the MathScript Node inside LabVIEW. However, I would like to see what other people think.
Avalim

Avalim,
Personally, I am determining that I like to use the MathScript Node in LabVIEW. It makes it easier for me to pass my data in and out of the LabVIEW environment!! But, like you, I am excited to see what any other users think!!
-Jeff P
Jeffrey P.
LabVIEW Product Management
National Instruments

Why is the first value missing in the Chart when I use Property Nodes to clear my Charts programatically ?

Hello everybody,
I am using Property Nodes to clear my Charts right at the beginning of the program. The Property Nodes (History) are outside a While-loop.
When I connect a Chart with the counter-variable "i" inside a While-loop, the first point I see in the Chart is (0,1) instead of (0,0). It looks like the Chart misses the first point !
If the Chart is outside the While-loop the Chart displays all points.
Can anyone please explain this behaviour ? How can I solve this problem ?
Thanks,
Cesar

Make sure you have the error output from the property node connected to
the loop border. Even if the error os not used in the loop, this will
ensure that the property node clears the chart before the loop starts
running.
What is probably happening is the loop start running at the same time
the chart is being cleared, so the first point is also being cleared.
Ed
Message Edited by Ed Dickens on 04-11-2006 09:50 AM
Ed Dickens - Certified LabVIEW Architect - DISTek Integration, Inc. - NI Certified Alliance Partner
Using the Abort button to stop your VI is like using a tree to stop your car. It works, but there may be consequences.
Attachments:
Clear chart before loop.gif ‏4 KB

How to use Crossbow Xmesh WSN LabVIEW drivers for downstream communication with motes

Hello,
I am trying to use LabVIEW Crossbow Xmesh WSN driver for downstreaming commands but driver programs are not working.
I am interested in changing node (Iris mote with MDA300 board) update rate from LabVIEW program running on host PC .
I have used Set node update rate.vi with open stream.vi and start stream.vi in proper sequence and developed a program to change node update rate. When program is run no error is shown but node update rate is not changed.
Pl suggest what I should I do.
What is the function of WSN write VIs (WSN write Raw 1sensor1point). For what type of message this is used.
I want to actuate relay on MDA300 with mote id 2. What VIs (from driver ) I have to use and how to issue command related to it.
Incase any one can help I will be grateful
Roop

Hi Arjun,
I am sending you snap shot of VI developed to change node update rate.and also the heirarchy of drivers VIs used in the program for better understanding .
In case you can figure out why the command message send is unable to communicate with mote .
Also for downstream communication with motes the packet format used is described in Moteworks user manual from MiMSic.com
I think the developer of these drivers can help you out in solving my problem.
Thanks
Roop
Attachments:
sreenshot to arjun ni for checking downstream comm.doc ‏288 KB

Using C structures in LabView

Hi,
I want to use this function into LabView:
struct my_output my_function (char * signal, unsigned size_signal)
the output of the function is a C structure:
struct my_output
double d_value;
unsigned u_value;
unsigned u_value2;
double d_value2;
}my_output;
I would like to retrieve the C structure in a cluster in LabView.
Is it possible to convert from C structure type to cluster type in LabView?
Thanks in advance,
Miguel.

Reinis,
Thank you for the program. This is just I need.
Miguel.
"Reinis Kanders" escribi� en el mensaje
news:[email protected]...
>
http://digital.ni.com/explprog.nsf/75c7cd5de6d387788625663d00558a4c/3d9437c9
> d630e5e48625683a000a8332?OpenDocument
>
> Check this example, that should do it.
>
> "Miguel" wrote in message
> news:[email protected]...
> > Thanks for the information, but I have a dll function and I want to use
> > "call library function"
> > to access to the library.
> >
> > Miguel.
> >
> > Reinis Kanders escribi� en el mensaje de noticias
> > [email protected]...
> > > First create CIN on your VI, then connect cluster to CIN's output.
> > > Right click on CIN and choose to create .c file.
> > > Output is belove.
> > > More info on how to compile lsb file to be used by CIN is on NI
website.
> > > CIN=code interface node
> > >
> > > /*
> > > * CIN source file
> > > */
> > >
> > > #include "extcode.h"
> > >
> > > /*
> > > * typedefs
> > > */
> > >
> > > typedef struct {
> > > float64 d_value;
> > > float64 d_value2;
> > > uInt32 u_value;
> > > uInt32 u_value2;
> > > } TD1;
> > >
> > > CIN MgErr CINRun(TD1 *Cluster, float64 *input_d);
> > >
> > > CIN MgErr CINRun(TD1 *Cluster, float64 *input_d) {
> > >
> > > /* ENTER YOUR CODE HERE */
> > >
> > > return noErr;
> > > }
> > >
> > > "Miguel" wrote in message
> > > news:[email protected]...
> > > > Hi,
> > > >
> > > > I want to use this function into LabView:
> > > >
> > > > struct my_output my_function (char * signal, unsigned size_signal)
> > > >
> > > > the output of the function is a C structure:
> > > >
> > > > struct my_output
> > > > {
> > > > double d_value;
> > > > unsigned u_value;
> > > > unsigned u_value2;
> > > > double d_value2;
> > > > .....
> > > > }my_output;
> > > >
> > > > I would like to retrieve the C structure in a cluster in LabView.
> > > >
> > > > Is it possible to convert from C structure type to cluster type in
> > > LabView?
> > > >
> > > > Thanks in advance,
> > > >
> > > > Miguel.
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > >
> > > -----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
> > > http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
> > > -----== Over 80,000 Newsgroups - 16 Different Servers! =-----
> >
> >
>
>
>
>
> -----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
> http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
> -----== Over 80,000 Newsgroups - 16 Different Servers! =-----

Feedback node in LabVIEW

Hi everyone,
I am trying to simulate the second-order generalized-integral SOGI in LabVIEW and compare step by step with Simulink. The results are the same until I make two feedback loops by using feedback nodes. The graphs in LabVIEW show nothing. Can you give me some recommends for these iteration loop?
I attach SOGI and my simulation model for detail.
I really appreciate your nice help!
Best,
Tuan
Attachments:
SOGI_fig.png ‏96 KB
Implementation.png ‏11 KB

You need to initialize your feednode nodes to an array of the appropriate size to match your waveform length.
In LabVIEW, what happens if you have {1,2,3} - {0,2}? The output array will be of length of the smallest of the arrays being subtracted. So you will get {1,0}. So what happens when you subtract an empty array? You will have an empty array as your output.
Here's a quick edit of your code.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines
Attachments:
TestPhase.vi ‏30 KB

Why knob need to use property node to change its value

Refer boiler vi in CLD exam sample question.
In the vi the knob vlaue is changed with a property node, it is not wired directly to a constant. The comment in the vi is something like "writing using property node because of the latch action of the booleans in the cluster"...
Huh? How do the booleans influence the knob even though they are in a same cluster? What principle is this called? I need to google this up, I didn't read it in.
my Labview books.
Attachments:
Boiler Main LV86.zip ‏61 KB

That comment doesn't make any sense.
There are two main reasons I can think of why you want to use a Value property node.
1. You want to control the order of execution by using the error wire.
2. You want to use a property node on multiple controls by feeding it references to different controls.
Neither of these appear to apply in the screenshot you show.
However, looking deeper, it looks like you can set the value of a specific item in the cluster by way of the property node. Check out the Link to section of its shortcut menu. I don't think you can use a local variable to set a given element of the cluster. Now you could change the value of the entire cluster. Read the cluster, bundle the new value for that one element, write to a local variable of the cluster. But you won't be allowed to do that because of the latched booleans that are a part of the cluster. Hover over the context help of that property node and read the description there as well.

Cin node and c++ code

Hi.
I need to make a LabVIEW program to call and use c++ code. Not only calculate numbers using the c++ code, the LabVIEW program needs to send boolian signals and be able to talk to the c++ code. Such things possible? Any good article or information to teach how to do it?
Thank you.
Airo

I'm not sure why it shouldn't be possible. At least as long as you are somewhat C savy and know how to configure your C compiler and linker to create specific output. However to be honest I think CIN programming has had its days. It does not really have that many advantages anymore but definitely some disadvantages above calling an external shared library through the Call Library Node.
As a reference about CIN or DLL usage in LabVIEW I recommend the online help documentation Using External Code in LabVIEW accessible through Help->Shearch the LabVIEW Bookshelf.
Rolf K
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

General Labview Error Handler question discussion

Recently two functions were brought to my attention, the General Error Handler and the Simple Error handler.
And I cannot wrap my hand around these two features. While I have been using Labview I have always used the Labview error cluster. When would you use these two features? As I feel the cluster error is much help.
Maybe it is my defnition that I have confused:
The general error handler will display a dialogue box describing the error that will be passed and shuts down the code?
The simple error handler notifys the operator that an error has occured but it can be customized for adding functionality, it takes the error cluster input and determines if an error was generated. "If an error has been generated, the VI displays a dialog box with the error code, a brief description of the error, and the location of the error." How is this not the same as an error cluster?
If anyone has any simple code examples for this or knowledge I greatly appriciate it.
Caleb

Jacobson wrote:
Psireaper9 wrote:
The simple error handler notifys the operator that an error has occured but it can be customized for adding functionality, it takes the error cluster input and determines if an error was generated. "If an error has been generated, the VI displays a dialog box with the error code, a brief description of the error, and the location of the error." How is this not the same as an error cluster?
You are correct that they give the same information. The difference is that if you want to use an error cluster you will need an indicator on your front panel. If you use the simple error handler you won't have to have an error cluster on your front panel but the user will be notified if an error does occur.
Think about all the programs you normally use (excel, chrome, etc.). As a user you expect that errors aren't happening, and if errors do occur then the application will usually just close out and you get an error dialog about the error.
I use the simple error handler with no user interaction to extract the error text. Is there an easier way of doing that?

How to terminate TestStand Application after a LabView error.

We've just started launching TestStand from a command line, and when it (TS) stops sequence execution due to a LabView error, the command window doesn't know its status. So, I have a two part question:
1) Is there a way to COMPLETELY STOP the TestStand application when a LabView error is encountered? (I have been able to get the error popup to stop, but TestStand is still active and the command line is still sitting there thinking everything is fine).
2) Assuming that there is a solution to #1, is there also a way to get LV or TS to report the error to an external command prompt or batch file?
Thanks,
   - Paul Iovanna
Solved!
Go to Solution.

Hi Manooch,
We've managed to get the TestStand sequence to stop when we want it to (by using the /quit option in the command line), but now we can't seem to get Reports to generate.
Specifically what we are doing is including a particular test sequence in a fully automated Build/Test/Report system. After an automated build of our product completes, we have tools and command files that load all appropriate code into the various components of our system, and then we lauch a TestStand sequence that exercises much of the newly imaged system. Since we are running from the command line - and that command line is being monitored by other processes within our Build/Test/Report system, we need to have TestStand stop AND exit, or else the command line just hangs.
So, we really need two things to happen:
1) Get TestStand to stop execution AND exit - and we seem to have this working.
2) Report the results from the test sequence:
   - We have no problem doing this when the Sequnce Editor is launched directly, and the sequence is started from its GUI.
   - However, when we use the command line to launch the sequence via your "TestExec.exe" - there's no report! All of the Report Options settings are the same as for the Sequnce Editor GUI.
So, at a minimum, we need to get the usual report to be generated and saved when we launch from the command line - and the preferred option would be to have any error codes from TestStand (or LabView, since the test sequence uses only LV steps) reported directly to the stdout, in this case the command line.
Hopefully that explains our setup and requirements a little better - and thanks in advance for the assistance.
FYI - TestStand version 4.1.1 running on Windows XP.

Using cin node in labview error happen

Similar Messages

Maybe you are looking for