Re: Capture right mouse click in image
Obviously i was not explicit enough in describing the problem. Event structures work on VI's only (as far as I know). It may even be possible to set it up to detect an event on an external (not your own) frontpanel. BUT NOT on a associated sub window such as an IMAQ image (not a picture on the frontpanel). And the IMAQ Event does not discern left and right click. Gabi
Re: Week returned by Format Date/time String
I have found two resources about date and time and their formats. One is the a href=http://www.iso.ch/iso/en/prods-services/popstds/datesandtime.html;ISO Standard 8601/a, the second is a german a href=http://www.pjh2.de/datetime/weeknumber/index.php;page/a. On this page along with other information all definitions used by Windows is listed. According to this page the ISO Standard has been established in Europe and most industrial countries. In USA it is ANSI X3.30-1985(R1991) and NIST FIPS 4-1. Since the ANSI definition you mentioned allows only Sunday (Jewish) or Monday (Christian) as first day of the week it ignores the Islamic world. For them the first day is Saturday. I could not gather information about Buddhistic or Hinduism based countries. For my application and the market aimed the ISO format is the one which will be choosen. Using %W and handling of week 0 should do it. Waldemar
Re: Capture right mouse click in image
Obviously i was not explicit enough in describing the problem. Event structures work on VI's only (as far as I know). It may even be possible to set it up to detect an event on an external (not your own) frontpanel. BUT NOT on a associated sub window such as an IMAQ image (not a picture on the frontpanel). And the IMAQ Event does not discern left and right click. Gabi
Re: Invoking an event from another event
Hi Joe, Thanks for the template. I think now I know what you were talking about. Thanks Kumar
Re: Week returned by Format Date/time String
The german page has also an a href=http://www.pjh2.de/datetime/weeknumber/index.php?l=en;english/a version. Waldemar
Re: Invoking an event from another event
Thanks a lot Grant, Your example came close to what I wanted to do.
Re: What is the most efficient way of passing large amounts of data through several subVIs?
I have real huge sets of data originating from an image-like (many pixels) data aquisition that is interpreted according to a similar large set of objects with many properties. This is all fed also through different GUI windows. Before I had this fed into and out of the sub vis via ontrols/indicators as learned. Now I just finished converting into keeping the master set of data in gobal variables and creating a local copy at the entry of the sub VI. Background of this not so common approach is, that once a front panel was open ( as in a user interface happens eventually) the data in the controls/indicators is still using up memory, Whereas since LV 7, I can release local memory like copies of global variables on exit. Of course in a man/machine interface speed is not so essential and timing performance may require a different approach, but my problem was reaching the all terminating limit of 2GB / process. Linux 64 with lots of RAM might have helped otherwise ;-) Gabi
Re: Search string in Array
Hi, it's me again, I just wanted to add that you maybe need to be careful with upper and lower-case letters. Since the upper-case letters are lower in the ASCII table than the lower-case letters, zz is the last possible match, not ZZ. If all your letters are upper-case, this won't make any difference, but just in case. Shane.
Re: Open a labview window to display GPIB data.
Hi Dennis Knutson, thanks a lot for your help. I am using ScopeExplorer as a scope. I am sorry, I don't really understand in which form the data will be. Shall I use the Read Visa vi like another person suggested and if yes how can I found out about the GPIB address? Thanks, Ninskaya
Re: Search string in Array
Dear Shane, Thank you for your comments.I verified with my requirement and it is working. Sathiyanarayanan
Re: Hiding Main VI's Window in built application
From my experience (6.1) At the top level VI: A) if I use property node FP.Open and wired False Value to it and the reference input is empty at run time when the property node is called the vi FP is close and the vi executing terminated. B) If I open reference in the top level vi to it self and wire it to the property node the FP panel is close and the vi keep running. C) In the executable app the top level vi FP is show always - I think the show FP when load is ignored. my question are: 1) way did closing the front panel of the vi is stop the vi execution (case A)?. 2) can I build app that the top level vi FP didn't open by default (silent mode)? Yonatan Tidhar X-Sender: [EMAIL PROTECTED] Date: Tue, 24 Feb 2004 09:37:12 -0500 To: E. Blasberg [EMAIL PROTECTED] From: Scott Hannahs [EMAIL PROTECTED] Subject: Re: Hiding Main VI's Window in built application X-NHMFL-MailScanner: Found to be clean At 11:41 +0200 02/23/2004, E. Blasberg wrote: A colleague wants to build an application where a Password dialog appears and only if the correct password is entered would the main VI appear. 1) Launch Password which then uses VI server to launch Main VI 2) Embed the password VI in the Main VI, but move the Main VI off-screen 3) Find a way to have the Main VI not show until the password is entered. I think #1 is a clear winner. First you throw up the password dialog, but in parallel, open a reference to Main.VI. This will cause the Main.vi to load while the user is entering the password. Ah, but doesn't loading the Main show its window (exactly what he's trying to avoid?) No. Opening a reference to a VI does not open its window unless it has been set to open window when loaded in the VI properties. You have to have the main vi, explicitly show its front panel when it is called by the password vi. Or you can have the password VI show the front panel, just before it runs the main VI. There is an example: http://sine.ni.com/apps/we/niepd_web_display.DISPLAY_EPD4?p_guid=B123A E0CB932111EE034080020E74861p_node=DZ52054p_submitted=Np_rank=p_answ er=p_source=External (watch out for line wraps by your email client!) -Scott ** The contents of this email and any attachments are confidential. They are intended for the named recipient(s) only. If you have received this email in error please notify the system manager or the sender immediately and do not disclose the contents to anyone or make copies. ** eSafe scanned this email for viruses, vandals and malicious content. ** **
How to use Labview to control measurement in a vector network analyzer?
I just purchased LabView7.0. I would like to use this software to control wireless propagation channel measurements in a vector network analyzer (Agilent 8722ES). I have also purchased the GPIB PCMCIA card for my laptop. I would be grateful if someone could let me know where can I get some information or manuals that will guide me for this purpose.
Re: Open a labview window to display GPIB data.
Sorry, the scope is a Lecroy Scope Explorer version 2.12. Ninskaya
Re: Instrument driver for Hewlett Packard E3631A
That is not an instrument driver for LabVIEW 5.1. That are the drivers for LabVIEW 7.x and 6.x.
Re: Open a labview window to display GPIB data.
Thanks a lot. Ninskaya
Re: Can you find and replace all sub-VI's in memory at once?
The only other sub-vi replacement situation in which you would not need to re-link sub-vi's is if the connector pane has not changed and the only change to the connections on the connector pane is that the only additional controls/indicators have been added to some empty terminals. In this case, you just need to save the change to the caller. So there is a small possible future time savings advantage of choosing connector panes with extra unconnected terminals when you first write a VI which will likely change and will be called from many callers. But if you change a control type or the connector pattern, or remove an item association from any terminal of the connector pane, relinking will be necessary. If the problem justifies the effort, you could always write one or more sub-vi call wrappers that use VI server methods to set and get the sub-vi's control/indicator values by iname/i. If your sub-vi has certain inputs that only take effect in some types of calls, this could allow you to have different simplified wrapper sub-vi interfaces to the same core sub-vi.
RE: [A] Infinite continuous logging of 16 TV (A+V) channels
I would initially say it is not feasible. You would need multiple PCs with several IMAQ cards (+ audio) each to get all the data into a system, and very large, fast hard drives to store the data. The drives would fill up very quickly. If you went to on demand recording of selected channels, it becomes reasonable, but still big. It would depend on the actual requirements. One thing I would consider if you decide to do a system like this is to look at video to firewire converters that combine a video and audio signal and convert it to digital video for firewire. I don't know if this format is compatible with the NI firewire drivers (I doubt it), but that might compress the video enough to record several channels on a single computer. They might be cheaper than IMAQ cards, which could only handle one channel each. They would also take care of synchronizing the video and audio for you. I don't know if the quality would be considered professional quality, though. I would probably just look at a large tape machine that records several channels to a large magnetic tape, and have backup system ready when you need to change the tape. Bruce -- Bruce Ammons Ammons Engineering www.ammonsengineering.com (810) 687-4288 Phone (810) 687-6202 Fax -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Roman Golubovski Sent: Monday, March 01, 2004 4:24 AM To: [EMAIL PROTECTED] Subject: [A] Infinite continuous logging of 16 TV (A+V) channels Hello, This is out of my expertise so I am posting it on the forum. A friend from a TV station would like to set a system for continuous 24h (or on-demand) recording of 16 TV channels (composite or AV) with professional quality. What would be the cheapest and most efficient solution HWSW - single or multiple IMAQ cards, single or multiple PCs, drivers, software, ..., considerations on reliability? I appreciate any info regarding any aspect, especially concrete products. Thanks in advance, Roman Golubovski, MSc Dipl-EEng [EMAIL PROTECTED]
IVI and traditional drivers for same device
I need to load both traditional and IVI drivers for an HP33120a. I loaded the traditional driver first and used it on a project and want to keep it so I can update the project. The directory it installed in was hp33120a. I tried to install the IVI drivers for the 33120 and it insists on installing in the hp33120a directory. So I renamed the hp33120a directory for the traditional driver so the IVI drivers would install, thinking I could rename the IVI drivers directory once it installed. Now LV (7.0) won't recognize the new directory for the IVI drivers and doesn't show up in the function palatte. I tried to edit the palatte but I can't seem to find any way to get it to recognize the new directory. Any ideas? George Medtronic Neurological, Inc., Sullivan Lake MS: N240 800 53rd Avenue NE Columbia Heights, MN 55421-1200 (763) 514-7264 [EMAIL PROTECTED]
Re: Process enum labels dynamically...
If you mean by labels of enum, the strings, then you cannot do that for an enum. This is how an enum is You can use a ring and change / set the strings using the strings attribute property. For an enum type, this property is a read only. However you can create a enum type-definition and change its strings, This would affect all the instances of the type definition. , and yes, the strings (of the type def) have to be changed manually
Re: Open a labview window to display GPIB data.
Like I said in my answer to one of your other postings, you've got the wrong driver. The HP34401 is a DMM. You should be able to use the VISA Open from the Instrument I/OVISAVISA Advanced palette to open a connection to the instrument. If you create a VISA resource name control or constant you should be able to click on the little arrow on the right side to see a list of all valid VISA resource names on your system. This is assuming that you've had MAX do a scan for instruments. Do this by expanding the Devices and Interfaces listing in MAX, select the GPIB0 listing, and right click on it.
Re: Process enum labels dynamically...
You cannot set the strings of a Enum control or indicator. See help under Programmatically controlling VIsVI Server properties and methodsGeneric ClassGObjectControlPropertiesNumericNamed NumericStrings[]. We use a Menu Ring. This one you can set with the Strings[] property. Waldemar
Re: Labview GPIB connection.
This question has been mailed to Dennis Knudson.
Re: Labview GPIB connection.
An HP34401A instrument driver will not work for a LeCroy scope. I don't know why the driver uses the old VISA Open function but that's the only thing that should work in the driver assuming that you have the correct address. Do a scan for instruments in MAX to verify the address or check the scope's menu.
Re: Open a labview window to display GPIB data.
ScopeExplorer is not a scope. It is a program that communicates with LeCroy scopes. Go to LeCroy's web site for A href=http://www.lecroy.com/tm/library/software/LabView/LabViewDrivers.asp?menuid=4;LabVIEW Drivers/A or NI's Instrument Driver Network for A href=http://search.ni.com/query.html?lk=1col=alldocsnh=500rf=3ql=pw=595qp=%2BContentType%3AInstrumentDriver+%2BIDNetManufacturer%3A%22LeCroy%22qt=layout=IDNet;LeCroy/A and download the driver for your brand of hardware. If you have a choice, get a LabVIEW driver as opposed to an IVI driver. An IVI driver will work but it's a bit harder to setup and you won't be able to modify the program or even see the code unless you also have LabWindows/CVI. In either case, with the driver you won't have to do any VISA Reads yourself unless you feel like you want to recreate what has already been done for you. The A href=http://www.ni.com/devzone/idnet/;Instrument Driver Network/A main page has some links to definitions of the different types of instrument drivers and how they should be used.
Re: Update from 2.0
I'm not sure if LV 5.0 can load LV 2.0 VIs. If this is true first convert your VIs to LV 5.0 and then to 6i and then to 7.0. If LV 5.0 cannot load 2.0 VIs contact NI support. They have a conversion toolkit which will convert all versions. Waldemar
Re: arabic
Look a href=http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101RPAGEID=135HOID=506500080048B0UCATEGORY_0=_49_%24_6_UCATEGORY_S=0;here/a. This one is for chinese but it will also apply to arabic I think. Send your email address to [EMAIL PROTECTED] and I can forward you another email from NI Stuff for another solution. Waldemar
Re: LabVIEW coding using wnaspi32.dll
Dear Ian, 1: a) The problem with this structure is that it holds a pointer to a callback function, parameter void(*SRB_PostProc)(); // Post routine. This is not supported under LV. If you can guarantee that this function will never be called by setting of some of the other parameters or will not be nesseccarilly be called to complete succeefully you can fill this with a U32 containing 0. Maybe this will be the only way by design that this function is not to call. b) The next one you cannot do is the BYTE*SRB_BufPointer;// Data Buffer Point parameter. You cannot tell LV that the element in the Cluster should only contain a pointer to the data and not the data itself. c) LV does not store array data directly in a cluster. So the last three parameters cannot be represented as data in a cluster. Maybe this will be corrected by the Adopt to type Property in the Configure DLL call. 2: a) This is done by using Initialize Array with a U8 and 32 elements set to 0. This will create a buffer. b) This is done by bundle by name. But for problem 1b 2b will not do the right thing. It will insert a handle to the array and not a pointer to the array. The only chance you have is building a wrapper DLL or CIN to avoid those pointer operations. Waldemar
Using Compound Aritmetic function
I have the readings from eight sensors going into an OR compound arithmetic function and would like to perform a task when any ONE of the values on the eight sensors goes below 450 (max is~ 500). However, as, if only one is below 450 the rest are not obiviously 'false' will be outputted. So its odds on that 'true' is never outputted. Does anyone know a way to use the single reading with the compound aritmetic or perhaps antother method? Thanks Sam
RE: SubVI location utility?
I have been using the Find Used and Unused VI's at http://openg.org/tiki/tiki-index.php?page=Find+Used+and+Unused+VIs It works very well. Johann Junginger. -Original Message- From: Ross, Michael [mailto:[EMAIL PROTECTED] Sent: Monday, March 01, 2004 10:10 To: info-labview Subject: SubVI location utility? In a recent thread Greg McK mentiuoned a some subVI location utilities? If y'all know where I can get one, please let me know. I did wander around the OpenG site a bit but nothing jumped out at me. Thanks, Mike
Re: Process enum labels dynamically...
Yes, you can change (write) the strings of an enum. However, the VI containing the enum must be idle (not running) in order to write to this property (it doesn't matter for reading). To do this, open a VI reference from another VI and then get a reference to the enum by getting a panel reference, and then searching through the Controls[] for one with a Label.Text whose name is the same as your target enum. -Jim
Re: Using Compound Aritmetic function
I think you need to clear up your question a little more. When one or more elements in an OR ca function is true, the output will be true, so if you don't care how many are below 450 (what I'm calling the TRUE state), the output will be what you want, just use a case statement with your task in the TRUE case. Dave.
Re: Call to WinAPI Kernel32.dll doesn't work in runtime
Hi Allen, a href=http://digital.ni.com/public.nsf/websearch/838170FB4A3EA0FB862561C60065C2F7?OpenDocument;Here/a is a link that talks a little bit more about Error 21. If I understand your problem correctly, I would lean towards making sure that you have all of your DLLs on the target machine and that they are located in an accessible directory. Good Luck! Jeremy L. National Instruments
Re: LabVIEW modules for Varian Mult-Gauge Controllers?
Chris, A good resource for instrument drivers is the NI website at this URL: http://www.ni.com/devzone/idnet/ If you cannot find an instrument driver for your device on this site, you should submit a request for the driver by clicking the [request driver] link. Also, if the device has a RS-232 port, you can use LabVIEW's VISA express VIs to communicate with the instrument. You may also want to flash an email to the manufacturer to see if they can provide you with a LabVIEW instrument driver for the device. I hope this helps. Have a great day! Joe Des Rosier National Instruments
Re: I have a problem during the collect data and save it in file with the HP8753C
Hello, Thank you for contacting National Instruments. It sounds like your instrument is hanging or freezing when you try to read and save data from it in LabVIEW. I took a look at the context help for that particular VI. It appears that if you attempt to read data from the HP8753 while it is also taking measurements, it can cause the instrument to hang. This may be the problem you are experiencing. Look over your program and ensure that the instrument is not trying to take new measurements as you read data from it in LabVIEW. Sequence structures may be useful in this regard. If you are still experiencing problems, however, let me know. Matthew C Applications Engineer National Instruments
Re: buffered digital output
Hello Thijs, The Port List connection of the DIO Config.VI should be wired with an array of the digital ports you wish to use. Each port has 8 digital lines. Unfortunately, the E-series devices do not support hardware-timed digital I/O. You could still output your points in a software loop, but you would not be able to guarantee 1000 Hz.For a card that does support this, look at the a href=http://sine.ni.com/apps/we/nioc.vp?cid=1104lang=US;6533/a. For further assistance in obtaining the correct board, go to http://www.ni.com and click on Contact NI at the top to speak with a customer support representative. Grant M. National Instruments
Re: Confounded and Ranting
I wonder if the following would be useful. How about a tool using a tree view control, which would present a hierarchical overview of a LabVIEW application in the left pane of a window, and detailed VI/Library information in the right pane. One of the details presented could be where the VI is loaded from. I could even see something along these lines becoming the main user interface for a LabVIEW project management tool. There are probably a lot of feature that could be included in such a tool that would be very handy to people working on multiple projects. Perhaps you could define project properties such as automatic prefixes/suffixes for all VI's in a project. Integration into a configuration control engine could be included. VI's actually loaded in memory could be highlighted somehow. I could keep going, but I think you get the idea. Would something along these lines be beneficial to a lot of developers or just a few crazy ones such as myself? :) (Needless to say, what I am picturing is not original. It kind of resembles the GUI for many text based IDEs such as Visual Studio.) John Howard George Gatling (Contractor) 03/01/04 11:05AM Thanks for the great feedback here! It seems that at some point a save operation failed and caused labview to write to the temp folder. I rarely save things outside of the normal folders and never to something buried and hidden in Documents and Settings. Also the hard drive is not even close to full... some 10% full with 100GB remaining. But many other things could cause a file write to fail. Then I suspect that I got presented with a search dialog starting in the temp folder (although I did not notice this at the time). After i had chose the first VI there, the garbage path was now in found vi/* and so it likely started pulling sub-vis from both the main and the temp depending on which parent was trying to load the file into memory. This would explain the seemingly random pattern of temp vs main files. The end of the story is it took about an hour to sort out, but I did eventually fix it. I think this is a very important topic, and if you have further questions or gripes, it is a good time to cover them. Might even have something to do with what I'm working on. I agree that this is an important topic, but the idea of further questions or gripes is mindbendingly open ended. I can say on a very high level that I am not satisfied with the way labview manages files and filenames. It is much harder to say what would make me happy. But I will let it percolate for a few days and see what revelations come to me :)
Re: labview advantages Over other languages
Hello arbm - First and foremost, you want to stress that LabVIEW is a programming language designed specifically with engineers and scientists in mind. You can point them to the a href=http://www.ni.com/labview/;LabVIEW website/a where they can learn more about the product and view demos. Let them know about the great support NI offers for its products and the NI developer zone where customers share ideas and solutions. Have a great day! Becky B. Applications Engineer National Instruments
Re: pid with transfer function
Hi Comerford1, a href=http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B45EACE3D88156A4E034080020E74861p_node=DZ52338p_source=External;Here/a is a link to an example PID Controller program that may help. Jeremy L. National Instruments
Re: VI's to demonstrate RZ and NRZ sampling?
Hello St Augustine, Thank you for your inquiry regarding sampling examples in LabVIEW. It sounds like you would like to demonstrate different sampling techniques. Is there any specific hardware that are using that you would like to demonstrate these effects of some of these things. I have provided some links that should get you headed in the right direction. http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=3DB45EACE3= DBE356A4E034080020E74861p_node=3DDZ52008p_source=3DExternal This link applies to aliasing... http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=3DB45EACE3= D82356A4E034080020E74861p_node=3DDZ52000p_submitted=3Dp_rank=3Dp_answer= =3Dp_source=3DExternal Other resources similar to this can be found on the ni.com website by clicking the support tab at the top of the home page. Then scroll down to Example Code towards the bottom of the page. There you can search for =93Referenced Sampling Demonstrations=94 or topics similar to this. I hope these resources help. Let me know if I can further assist you. Shea C. Applications Engineering
Where can I download VISA IC?
I am trying out VISA on Win XP. I need VISA IC to figure out what instruments VISA can recognize.
Re: Update from 2.0
Hello Tx, Unfortunately, LabVIEW 5.0 cannot convert VI=92s from LabVIEW 2.0. Info about the free upgrade toolkit can be found a href=3Dhttp://ae/operations/ae/public.nsf/webPreview/429E45271CFD683786256D= 87006B1EEF?OpenDocumenthere/a. Have a nice day! Robert M Applications Engineer National Instruments
Re: XY dot plot slows down over time
Hello Amir, Thank you for contacting National Instruments. I am assuming that you are building X and Y arrays using shift registers within a loop and using these arrays as the inputs to the Express XY graph VI. If this is the case, during every iteration of the loop, the XY graph essentially redraws all data (new and pervious). As you accumulate more and more data, this process slows down considerably as the XY Graph has more to plot. You may want to consider using a chart. A chart does not re-plot all of the previous data in the way a graph does. A chart plots one point at a time as it arrives. I hope this helps! Let me know if you have further questions. Matthew C Applications Engineer National Instruments
Re: Using Compound Aritmetic function
Sorry if it was a bit muddled, I think I know what to do now. Use AND instead of OR. Then use the false statement of the case for my task when all the sensors readings are not more than 450.
Re: Hiding Main VI's Window in built application
Because in A, once you close the front panel there is no reference to the VI, unless it has opened its own reference. At 1:38 PM +0200 3/1/04, Yonatan Tidhar wrote: From my experience (6.1) At the top level VI: A) if I use property node FP.Open and wired False Value to it and the reference input is empty at run time when the property node is called the vi FP is close and the vi executing terminated. B) If I open reference in the top level vi to it self and wire it to the property node the FP panel is close and the vi keep running. C) In the executable app the top level vi FP is show always - I think the show FP when load is ignored. my question are: 1) way did closing the front panel of the vi is stop the vi execution (case A)?.
Re: Select disabled item in tree
Hello Ben, Thank you for your inquiry regarding tree controls. It sounds like once a branch is disabled you cannot enable it again. It might help me to look at some simple code demonstrating the problem but there are a few suggestions that I can make. It seems like you need a control that would allow you to enable the branch on a value change of the control. One possible solution may be to use a LED next to each branch that would allow you to do this and use this value change in the Event Structure to enable the branch again. This could get complicated however and you might want to rethink your approach of controlling the experiment. I hope these resources help. Let me know if I can further assist you. Shea C. Applications Engineering
Fatal internal error:memory.cpp,line 593
I need some help.
Can some please explain what i am doing wrong here. i have created a
Dll from a LV 7.0 vi. The header file looks something like this:
typedef struct {
long dimSize;
double elt[1];
} TD2;
typedef TD2 **TD2Hdl;
typedef struct {
double f0;
double df;
TD2Hdl magnitude;
} TD1;
void __cdecl Spectrum(double freq, double amp, TD1 *Spec);
And i have the following code where i allocate memory and attempt to
call 'Spectrum':-
TD1 *Power;
double frequency=10, amplitude=1;
Power = (TD1 *) malloc(sizeof(TD1));
(*Power).magnitude = (TD2**)malloc(sizeof(TD2));
*(*Power).magnitude = (TD2*)malloc(5000*sizeof(TD2));
(*Power-magnitude)-dimSize = 5000;
for (i=0; i500; i++) {
(*Power-magnitude)-elt[i] = 0;
}
Spectrum(frequency, amplitude, Power);
I keep getting Fatal internal error: memory.cpp, line 593 when it
tries to call Spectrum. I believe i have allocated memory correctly
although i may be wrong. (I was getting 'exception' errors before).
The VI i used to create the Dll contains a basic 'Function Generator'
(sine wave) and a 'Power Spectrum'.
I have looked at the Knowledge base and dll examples that come with LV
7.0 and have tried setCINArray and NumericArrayResize but have not had
any luck. It seems like the documentation is for LV 6.0 and 6.1.
Has anybody seen this or have any idea why i am getting this?
Thanks
Re: Inputing multiple files at once
thank you very much... i really appreciate your help!
RE: CDR Writing with LabVIEW
Thanks Rolf. I see they also have an SDK that you can download from the Nero website. It seems you have to install the Nero software package in order to use the neroapi.dll. I found a website the sells it for $7.99. This is a great starting point and I appreciate your help. Thanks again, Guy Holland Intralase Corp. -Original Message- From: Rolf Kalbermatter [mailto:[EMAIL PROTECTED] Sent: Saturday, February 28, 2004 2:45 AM To: Holland, Guy Cc: Info LabVIEW (E-mail) Subject: CDR Writing with LabVIEW Holland, Guy [EMAIL PROTECTED] wrote: I don't remember if this topic was covered before but I am interested in writing data to a CD programmatically from within LabVIEW. Has anyone out there tried this? Does it matter which type of CDR it is or is there a common interface for all CDR's?I would like to check if there is a blank CD in the drive, if so, write the data to CD and then open the drive and send a message that tells the user it is complete. I'm using LV7.0 on Win2k. CIT Enginering has developed a LabVIEW library NeroVIEW for Windows to control the Ahead Nero Burning Rom software directly from a LabVIEW program. It was developed for Nero 5.5 but should work just as well in Nero 6. http://www.citeng.com/pagesEN/products/cdrec.aspx Alternatively Nero supports also a command line interface tool which you could call with the System Exec function. Rolf Kalbermatter CIT Engineering Nederland BVtel: +31 (070) 415 9190 Treubstraat 7H fax: +31 (070) 415 9191 2288 EG Rijswijkhttp://www.citengineering.com Netherlands mailto:[EMAIL PROTECTED]
Re: Hitting Back Space in Remote Panel while entering character in string control
Cut and paste this snippet into your the HEAD of your HTML document
to make IE ignore the backspace.
lt;script language=JavaScriptgt;lt;!--
function mykeyhandler() {
if (window.event window.event.keyCode == 8) { // ignore the
backspace
window.event.cancelBubble = true;
window.event.returnValue = false;
return false;
}
}
document.onkeydown = mykeyhandler;
//--gt;lt;/scriptgt;
Why does priority of NON RUNNING vi affects execution time of subVI?
I'm chasing a weird timing problem. LabVIEW 7.0 + Windows 2000 I have a VI (called the Object), whose purpose is to store and retrieve numerical values by name. The name is hashed, converted to an array index and the values are read / written to an array slot. That all works fine. I have a tester for the Object. It generates random names and random values. starts a timer, stores the values (say 1000 of them),marks the timer, reads the values, and marks the timer again. The point is to judge the execution time of the Object. That all works fine. EXCEPT I measure a particular case at 11.44 mSec for 1000 writes. Repetitions result in numbers similar to 11.44 I then load a particular VI from a program I'm having trouble with. The trouble is it's taking more time than expected to process data. This VI is normally set to execute at TIME CRITICAL priority. This VI uses (indirectly) the Object. If I load this VI WITHOUT RUNNING IT, and run the tester, the execution time goes from 11.44 to 27.08 mSec. The VI is NOT RUNNING, yet it's presence affects the execution time of a VI it uses. If I change its priority to NORMAL or BACKGROUND, then the tester reports the shorter times (11.44 or so). If I change its priority to ANYTHING above NORMAL, I get a 27+ mSec time. I can change it back to normal, and get the normal execution time. Why does a given VI's priority affect it's subVI's execution time IF IT IS NOT EVEN RUNNING? And how do I fix it?
Re: Hitting Back Space in Remote Panel while entering character in string control
Thanks Shaun Martin for your help, the code snippet was very useful. Now the back space is not going to the previous page. Still it is not able to clear the last character entered in the remote panel string control. Is there any labVIEW settings to do this?
Re: Why does priority of NON RUNNING vi affects execution time of subVI?
MORE INFORMATION: If I put the Object VI (normal priority) in a brand-new VI, the tester shows the faster execution time. If this new VI is set to ABOVE NORMAL priority, the execution time balloons upward again. If I raise the TESTER's priority to match (or exceed) the new VI's priority, it's back down again. In other words, it looks like calling a lower priority VI from a higher priority VI puts a fence around that lower-priority VI, EVEN IF THE CALLER IS NOT RUNNING. Other VIs of the same lower priority suffer the penalty of that fence.
RE: Hiding Main VI's Window in built application
Yes I thought so, but way should the execution should be depend Were the front panel is open or not? No meter if I leave open reference to the VI I was expect that the vi execution will continue until the code ends. Yonatan Tidhar Bae systems ROKAR International Ltd -Original Message- From: Scott Hannahs [mailto:[EMAIL PROTECTED] Sent: Monday, March 01, 2004 21:11 To: Yonatan Tidhar; [EMAIL PROTECTED] Subject: Re: Hiding Main VI's Window in built application Because in A, once you close the front panel there is no reference to the VI, unless it has opened its own reference. At 1:38 PM +0200 3/1/04, Yonatan Tidhar wrote: From my experience (6.1) At the top level VI: A) if I use property node FP.Open and wired False Value to it and the reference input is empty at run time when the property node is called the vi FP is close and the vi executing terminated. B) If I open reference in the top level vi to it self and wire it to the property node the FP panel is close and the vi keep running. C) In the executable app the top level vi FP is show always - I think the show FP when load is ignored. my question are: 1) way did closing the front panel of the vi is stop the vi execution (case A)?. ** The contents of this email and any attachments are confidential. They are intended for the named recipient(s) only. If you have received this email in error please notify the system manager or the sender immediately and do not disclose the contents to anyone or make copies. ** eSafe scanned this email for viruses, vandals and malicious content. ** **
Re: Call Library node with function returning C string
I prefer cautious, (but paranoid might also apply). I had a bad experience back in the LV3/4 era when we forgot to size the string buffer connected to the input side of a string in the CLN argument list. Thanks for the clarifications, I will sleep better now. Rich
