TobyD

QUOTE (Maca @ Dec 21 2008, 02:59 AM)

There has been a lot of homework questions lately though...

The HH's always come out in full force near the end of the quarter/semester at school - days before their final projects are due.

Well said. I couldn't agree more :thumbup:

QUOTE (Psyfusion @ Dec 14 2008, 01:08 PM)

Hi!

My bigger problem is solved i think but now i'm stuck with the following:

I have a while loop nested into a true/false case structure. If i change the true/false input, the change only comes if the inner while loop is finished...this is normal, but i would need a way to do the 2 processes parallel. So if i change to input to false, the while loop would be ignored and the process would stop immediately!

Please help me solve this!

Thanx!

Please post your code - it is much easier to comment on code than on a vague description. That said, look into the "producer consumer with events" design pattern. I think it will handle your problem nicely.

QUOTE (Aristos Queue @ Dec 15 2008, 09:40 AM)

The latest revision of my LabVOOP Design Patterns document -- with some revisions and with all the implementations filled in finally -- is now available...

This is great! I look forward to digging into it a bit deeper when I have some time. :thumbup:

QUOTE (Altobo @ Dec 9 2008, 11:55 AM)

We were able to figure out a way to make it work.

Glad to hear it all worked out! I especially appreciate your use of Fluke products - it keeps me employed :thumbup:

QUOTE (Norm Kirchner @ Dec 8 2008, 12:54 PM)

If anything, NI folk should be granted premium status just by the sheer fact that they support the careers of most people on the forums...

It could be argued that we $upport your career

Congratulations by the way - I haven't had much time to reply in the last couple of weeks.

-Toby

QUOTE (BrokenArrow @ Nov 25 2008, 09:48 AM)

edit: Toby, your member info says you've been on LabVIEW since 2007? I'd like to nominate you for "Fastest LAVA Ever".

Thanks! I think I just caught the bug. I still don't know half as much as a lot of people here, but I really enjoy LabVIEW. I need to get into a job where I can use it a bit more aggressively.

QUOTE (jdunham @ Nov 25 2008, 10:43 AM)

This is likely true. I've found my local reps to be quite helpful and they could probably scrounge up a copy for you. It never hurts to ask.

QUOTE (BrokenArrow @ Nov 25 2008, 07:29 AM)

I apologize for this being tangential, however: why use the Open Visa before the Setup?

My point here was just to demonstrate the while loop. I kept his original code unchanged (other than running the diagram cleanup tool on it). That said, the VISA driver used to require a VISA Open at the beginning of a program. It was later changed so that the driver would automatically open a VISA reference if it needs one. So, it is not even necessary to have it in there at all - although it is probably still a good practice from a readability point of view.

QUOTE (BrokenArrow @ Nov 25 2008, 07:19 AM)

How do you "upsave" to 8.5?

The only way I know to do it is with an intermediate version like you suggest. If it's small I'm sure someone here can upsave it and send it back to you or I think NI will usually hook you up with a trial license of the intermediate version of LabVIEW if you need it for the upsave.

We have one application where we are using 12 USB to RS232 dongles + the one on board RS232 port with no issues. You can pick the adapter dongles up for less than $15 each so that might be an option as well. The only thing we had to do is to force each adapter to a specific com port so that if it got plugged into a different USB location it would keep the same COM port number.

QUOTE (brian @ Nov 21 2008, 03:46 PM)

Fixed in a future version of LabVIEW whose existence I can neither confirm nor deny.

That's a pretty quick turn-around time. Thanks for the explanation!

Toby

QUOTE (Aristos Queue @ Nov 19 2008, 12:48 PM)

Reported as CAR 134006.

:thumbup:

QUOTE (chocobar @ Nov 18 2008, 06:59 PM)

im trying to say that my VI will be running 24hrs...and yes i started the VI with the Run Continuously button...

With the VI that you posted, your trigger will always be true (0+0=0 --> True) so if you set to "run continuously" your vi will run, send the message and then start all over again. The "run continuously" button is generally only useful for debugging and should not be relied on for a permanent solution.

You need to build some code around this VI that keeps it running and passes it a legitimate trigger. A simple example is shown below.

Original

Modified

QUOTE (Wolfram @ Nov 18 2008, 05:54 AM)

Hi folks,

attached I have a VI that produces a memory leak. It works ("misworks") in LabVIEW 8.6 and 8.5/8.5.1 but not in LabVIEW 8.2. The attached VI is saved in LabVIEW 8.5.

Wolfram

I can confirm it (LV8.6 on Vista) but I can't explain it. Did you send this to NI?

QUOTE (chocobar @ Nov 18 2008, 04:50 AM)

my target is to run this thing continously and when it triggers...the sms system will be activated and thus send out 1 email to respective numbers

Can you clarify run this thing continuously? What do you mean by that? Are you starting the VI with the Run Continuously button? Post the code of how/where you are calling the VI that you posted previously and I think we'll be able to help you.

-Toby

QUOTE (neB @ Nov 18 2008, 05:37 AM)

Congratulations Rolf and thank you for all of your participation in the various public forums.

Indeed. Thank you for all that you contribute!

-Toby

QUOTE (bmoyer @ Nov 18 2008, 06:08 AM)

Is there a way to determine if .NET is installed programmatically?

You can also check the file version of mscorlib.dll. It will be located in a subfolder of C:\Windows\Microsoft.NET\Framework. The file version is the .net version - there may be more than one version installed.

I understood semaphores a bit better after learning Italian. The Italian word for traffic light is semaforo, which tranlsates directly to semaphore. If you look at the intersection as your shared resource, the traffic light is the semaphore controlling access to that resource. It only allows access in a safe way to everyone involved. (I'm not sure if data ever runs red lights though)

QUOTE (blitzkrieg @ Nov 13 2008, 12:13 PM)

Here it is

Sorry for my lack of knowledge.

You don't have to apologize for your lack of knowledge, that's why you're in school. But if we do the work for you, you will never gain the knowledge.

I'm not sure what you are trying to do with the latest VI that you posted. You need to understand that the PID VI I posted is not even close to the full solution. That is just one piece of the system (or one subVI). You need to be calling the PID VI in a loop where each iteration passes in the updated Process Variable (and you'll need to connect the terminals because I forgot to do that ). The graph will then be updated in the same loop that calls the PID subVI.

After looking at the Lab you posted, there are some pretty specific requirements. You need to layout the front panel, check the PID VI I posted to ensure it is using the same PID equation that the lab refers to, etc. You have a lot of work left to do. We all enjoy helping people out, but don't expect anyone to bail you out and do the work for you at the last minute. This looks like a lab that should require many hours of work on your part. Good Luck!

(Read up on shift registers - you're going to need them)

Toby

QUOTE (dannyt @ Nov 13 2008, 07:18 AM)

TobyD, that's twice in two days, I must say a big thank you, as it does my ego good :beer:

Dannyt

It's http://forums.lavag.org/A-guide-on-how-to-behave-in-Forums-t12418.html#' target="_blank">the video you posted. It has inspired me to wait until I see someone give a good answer and then add "I Agree". It keeps my post count high. :thumbup:

QUOTE (sharon08 @ Nov 12 2008, 07:55 PM)

Hi,

I can access the file...for example..the following is path to the remote machine:

http://file://%5CSgpl129a4_Software_DeptAlpha' rel='nofollow' target="_blank">\\Sgpl129a\4_Software_Dept\Alpha (thru 'My network Places' also works with 'Run' option..)

I agree with Danny. I think your path must be incorrect. I noticed your vi open with \\sgp1935c\\Dial_S_for_Success\Shiva.txt in the path. There is an extra backslash in there after the computer name. Could that be your problem? I was able to open remote files using UNC (\\computername\folder\filename.txt) with no problems.

QUOTE (crelf @ Nov 12 2008, 02:31 PM)

My bad. I think that "hustler" is generally a negative term (let's not talk about the magazine ). Perhaps it would be more constructive to limit it to just "homework"?

That works for me.

QUOTE (Ton @ Nov 12 2008, 02:08 PM)

Sorry I thought you meant to. (sincerely)

OK, I forgive you

QUOTE (Ton @ Nov 12 2008, 02:08 PM)

I agree.

QUOTE (Ton @ Nov 12 2008, 12:55 PM)

I deleted your tag.

I think a PM letting me know why my contributions to the community are being thwarted was in order.

QUOTE (crelf @ Nov 12 2008, 01:27 PM)

I disagree. There could be a post that I need to search for in the future where one of the things I remember is that it was a homework type question. In the case of this and many other HH's, I did try to offer some useful advice to the poster - I was not tagging just to be negative . Besides, I thought I couldn't go wrong following the advice of the Admin.

QUOTE (Michael_Aivaliotis @ Jun 2 2008, 11:04 AM)

QUOTE (Ton @ Nov 12 2008, 12:55 PM)

I deleted your tag.

Ton

Why?