Eugen Graf

And what is with tunnels ?

Thank you all for explanations.

Regards, Eugen

QUOTE (crelf @ Jun 9 2008, 03:01 PM)

No, it doesn't. I see it as a pointer back to the output of the last node. That said, LVOOP wires might be considered differently, as branches instantiate?

Ok, a pointer, not a "C-local variable"?

Or is it like this?

struct inputs1;

struct inputs2;

struct outputs1;

struct outputs2;

and if i call a SubVI, than

VI2(inputs2)

{

return output2=0

}

VI1(inputs1)

{

return output1 = VI2(inputs1);

}

and so on. I think you understand what I mean.

Thank you

Some VIs for download you will find here:

http://www.labviewtutorial.eu/viewforum.php?f=71

Regards, Eugen

Is a data wire a node ?

I think a node shoud have:

Input

Output

Functionatity

A wire has it (Funktionality is the tamporary saving of data value).

What do you think about it?

Ok, thank you for answers!

1) Where can I see if a member VI is dynamically or statically defined (e.g. if I get a OOP project from other people)?

2) Can I change a static member VI to dynamical and back after definition? Should I always take better dynamical?

3) Can I use one dynamical member VI on more than one loop in my programm parallely (for copies of the same class) or it's the same as staticaly use in this issue? Reentrant VI is other thing as statical or dynamical member VI?

QUOTE

Doing so would also save you from ever having to update the Bundle/Unbundle nodes, since you'd just unbundle the cluster as a whole and bundle the cluster as a whole, not each individual element.

Is there a possibility to update Bundle/Unbundle Node by rightklicking or sth. like this?

QUOTE

Yes, right, but I think e.g. if I change a name of an member, my Bundle/Unbundle will not be automatically updated like if I use Strickt Type Definitions.

So, ok. I will use a task (loop) for each class and communicate over queues, notifiers or user events.

Can anybody explain me please when I should use dynamic member VIs and when to use static member VIs?

And the next question is how can I define class members so, if I add new members or remove some members, all member VIs will update the class cluster? Should I define the class cluster as typedef for it?

Thank You.

Can be, VISA driver is not installed on your PC ?

Ok, thank You both! I understand this very good, but that is really bad!

Do NI want in the next time implement this feature or it will always stay by "pass by value"?

If not, I don't see any advantages in use LVOOP.

Thank You

Hello LAVAs!

I began with OOP and want to use one Class in two parallel while loops.

I have created a class with a Enum Member and Read and Write this member VIs (Set& Get Methods).

So the upper loop should Increment this Enum on Buttonclick. I Read this Enum using Read, increment and Write the enum.

The bottom loop should Read the enum and Swith the Switch-Case structure. But nothing happens.

Can You explain me please why it doesn't work?

Thank You, Regards, Eugen

I don`t understand why you do not connect the data from Enqueue to the loop termination terminal. And I think to use "0"-timeout is not really good. I preffer "-1" as timeout value.

Hello, your company uses SVN Server as SCC and TortoiseSVN as front end for it. I bought the PushOK plug in to be able to use SVN directly from LV Project Manager. It seems to work, but I get some problems in understanding it.

My questions are:

1) Which architecture do you use in repositories?

2) I or we use this one:

Local path of a project is e.g C:\MyFiles\LVProjects\TestPrj

So the main module in rep is:

TestPrj\trunk (the current copy of the project)

TestPrj\branches (versions of the project)

TestPrj\tags (releases of the project)

What is the best way to set up SCC in LabVIEW to realize this architecture?

3) If I create a new project I do project-specific settings for SCC:

main-module for Project-Repository is TestPrj\trunk

branches and tags directories will be automaticaly detected

But the local path too ( C:\MyFiles\LVProjects\TestPrj\trunk ), but this is wrong, so I have to change it manually. Any better ways to make it automatically?

4) How can I get any older version of my project from the repository-server? Should I delete my current Project-Directory and check out version I need in the empty directory? I think I get some problems on this step. How do you do this? Can you explain me please?

5) Are there any tutorials how to use SCC in LabVIEW rightly?

Thank you in advice, Eugen

QUOTE (hepman @ Mar 31 2008, 09:30 PM)

Dear All,

is it somehow possible to find out with code if a terminal in a Sub-Vi Connector pane is connected or not.

Best Regards

Hepman

You can define your connectors as required, so you will get an error if this connector is not connected.

QUOTE (ibbuntu @ Mar 21 2008, 09:29 AM)

Thanks for that, this does look like exactly what I am trying to do. I will have a look and see whether I can incorporate this into my code. I guess I am suffering from this problem with my implementation (from the wikipedia page):

In my application I do require the guarantee that all messages will always be delivered, as my system requires the messages to undergo transitions in state. Such as going from a state of waiting for path information to a state of capturing data and saving to the provided path.

Tom

Yes, I agree, the dispatcher tryes to send a message to a client, and if it doesn't work, than gives up. But that it only a implementation problem. I am working now on the handshake between dispatcher and clients, that should give more safety in the communication. So you can detect if a client is alive or not. If not you can fire a error message in your programm.

Bot othersides if you want, you can try to send your message again and again from dispatcher to client. In fact I never got problems in communication in my design pattern. Only if a client is not alive or the (TCP/IP) connection is broken.

I don't think the implementation of this pattern in your code is a big issue.

E.g. I installed a dispatcher executable on a web server, and rewritten (in 5 minutes) my TCP-Client-Example to the string messages, so I got a working web-chat. That works very stable. If anybody want to test it, so mail me.

Regards, Eugen

Hello Tom, please try this design pattern, I think it will solve your issues.

http://forums.lavag.org/Publish-Subscribe-file122.html

With this pattern you can communicate between different loops and PCs.

P.S. I think any type of variables (locals, globals and shared) takes some traffic. If you don`t want to check if a variable is blank or not, so use VIs from the synchronisation palette. E.g. Queue or notifier, if you want to mix user input with programm data, so use user events.

Reagrds, Eugen

QUOTE (Ale914 @ Mar 20 2008, 04:20 PM)

Very Nice Eugene, you can do whatever you want, this is a free world.

my point was different, take it like a suggestion, not waste your time duplicating something already exist, but again you are free to do it.

Anyway, please, can you explain me the differentiation factor between what we have now and what you want setup?

When i setup ilvg.it i had clear in my mind this factor, built up a local italian community, that was different to simply translate Lava in italian but was to create user gruops in various italian cities, this was an innovation not a replication.

Alessandro, would you tell me please if you got synchronized your PhpBB3 Forum with your Mambo CMS? Or you don`t have users in your CMS, but only in Forum?

Thanks

QUOTE (Jim Kring @ Mar 20 2008, 05:40 PM)

Eugen,

I'm looking forward to seeing your blog and tutorials. It sounds like this is something that you are very passionate about. One piece of advice that would give you, is to focus on creating something special/unique that you are passionate about and strive to do it better than anyone else.

Cheers,

-Jim

Ok, my first Idea was to publish the Design Pattern "Publish Subscriber", am realy ardent about such things. But not only this design pattern, more the communication between parallely threads, and administration tools for such projects. So I want, that other people discuss my tutorials, and installed a forum on my site. Now I installed CMS, so any people can publish their tutorials and discuss them in my forum. So they are my motivation and intention.

Eugen

QUOTE (crelf @ Mar 19 2008, 10:49 PM)

My thoughts here. I figure I must really misunderstand the motivation for this new forum, because I don't understand it at all.

The motivation is:

To create a worldwide LabVIEW community in multiple languages (everybody can mail me and ask if I open a new subforum/tutorial site in his language. I don't speak more than three languages, so I have only this three subforums and tutorial sites)

To make tutorials for everybody, who want to write own articles.

And the basic motivation is, that I want have my own blog, where I can publish my tutorials

I think LAVA is very good, big and nice LabVIEW Portal, but it's only in english-american. Please don't misunderstand me, I only want to have my own ressource, why not ?

Look on C/C++, Java, PHP and so on Communities. There are thousands of them, and for LV only

NI

LAVA

LabVIEW Forum

and some russian forums

(I don't bear other countries in my mind)

Not to much.

Regards, Eugen

QUOTE (Ale914 @ Mar 20 2008, 02:12 PM)

Nice, Alessandro. Is it forbidden to support italian language, because an Italian foum exists? Sorry, I don't understand you.

If anybody will want to open an italian subforum in LVTutorial Forum, I will setup one. No problem.

QUOTE (TobyD @ Mar 19 2008, 10:50 PM)

If you take the /en off of the link you'll find the other languages. Still, I agree with your post - LAVA is an excellent forum for all things LabVIEW and it's relatively easy to "keep up" with what's going on in the community. More is not always better.

Ok, the website is under construction now. But I will have following.

this forum on the main page www.labviewtutorial.eu and three links (country flags) from forum to three tutorial pages:

http://www.labviewtutorial.eu/de

http://www.labviewtutorial.eu/en

http://www.labviewtutorial.eu/ru

From each tutorial page you will be able to switch back to the forum or select one other language tutorial page.

Thanks for feedback, I hope my tutorials will be helpfull to all LabVIEW users.

Can you say me please if it's allowed to use LAVAs RSS Feeds on my website?

Thanks in advanced.

Please look this example:

http://www.labviewtutorial.eu/forum/viewto...p?f=22&t=24

So if you want to read serial port continiously, put the VISA read VI into the while loop!

QUOTE (crelf @ Feb 12 2008, 06:57 PM)

The main page's English translation doesn't seem to work (it stays in German), and I can't see how to set the forum to English...

:question: I don't want to discourage you in any way, but I wonder if it might make more sense to have those items over here, perhaps in a new sub-forum?

So, english version should work now

http://www.labviewtutorial.eu/en

The content will come.

I use Queues and Notifiers for this.

QUOTE (mross @ Mar 11 2008, 11:56 AM)

I can also edit directly the values in a table indicator.

...

You said, "Of course you can double click on the table (or klick on the edit button) and pop up a new window and enter new values from there."

...

I am using 8.5 - I don't seem to get this action you describe. When I double click I just move between the front panel and block diagram. And I couldn't find an edit button at all. I obviously am missing something that you are trying to explain.

I think on a running VI or Application, so not in edit mode.

You can use an event structure to catch the (double) click event on the table.

Eugen

If you use a table control you can manually edit some values directly in the table. Like in MS Excel. Of course you can double click on the table (or klick on the edit button) and pop up a new window and enter new values from there.

So I use sometimes a table control as an indicator(using a local variable) to import a spreadsheet file and then to edit and save them to a file.

Or import a file, than select some columns and show them in a plot ...

Eugen