Re: How to list files from directory in list box?
You must be using a news reader and not going to A href=http://zone.ni.com/devzone/devzoneweb.nsf;NI Developer Zone/A. Enter the discussion forum through there and see an answer with an example. I think there's another example on the Developer Zone, so try doing a search from there as well.
How can I reset the value of an array?
How can I reset the value of an array at the beginning of my program?
Re: multiple images
Hi Dr Berns I tryed to work withthe picture VIs but the help on them is not the best... They seem to be the ideal solution for my problem can you direct me to some example code ? thanks for your help. regards Luis
Re: I have a digital storage oscilloscope tektronix 2430,and an...
Hi there, My suggestion is start try with MAX to communicate with your scope, Download the driver for the scope from NI.com. And from there you can get started. Good Luck and if you need any help, just post in this forum.
Re: multiple images
HI LuisM, Go with George's suggestion. The techniques outlined by George Zou were used in the demo I posted here http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101RPAGEID=137HOID=506500050014570100HTHREAD=87828UCATEGORY_0=_49_%24_6_UCATEGORY_S=0 In that example I used about 25 images but you can get by with less. 30 frames per second will look smooth, so figure out how long you want the valve to move and start drawing!. Have fun (the example is supposed to be funny and enlightening). Ben a href=http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101RPAGEID=261HRedirected=TrueHUserId=101_3529RFORMNUMBER=6;Ben Rayner/a a href= http://volt.ni.com/niwc/common.jsp?page=products_certification_cldnode=10638; Certified LabVIEW Developer /a www.DSAutomation.com
Re: DAQ Noise with Laptop
It sounds like you are trying this in a an extremely noisy environment! 1m of unshielded wire could induce that much noise only if your environment is real bad. MOST laptops will float rleative to ground. Even when plugged in. Try running a ground wire to the AI GND input to see if that helps. The diferential input is good up to the CMR level of your device. Ben
Re: UK LabView user group?
Not yet! The LV Zone has a UG locator here http://www.ni.com/devzone/lvzone/usergroupsearch.htm But the UK is not listed YET! THat same link will help you start your own if you are so inclined. I have thought about starting one in the Pgh PA area but... Why do that when I have the Dev-Exchange to keep me jumping. I hope this help, Ben
Re: DAQ Noise with Laptop
Additional thought on wires. try twisting them to see if the noise level goes down. If so use use shielded twisted pair cable to shield from your noisy environment. Ben
Re: Changing the brightness and contrast of an image displayed in a picture control
This is no easy task! The simpler of these two request would be the brightness. To make a color brighter would involve shifting the color value in RGB space toward white (255,255,255). This shift in color values can not be a fixed amout for all three components (RGB) but should be scaled based on the original color and its distance in color space from white. I believe brightness will be the easier part because it involves only comparing a single pixel color with white and adjusting. Contrast is more complicated because it will involve shitfting some of the colors toward white and others toward black. So... The image Toolkit just may be worth it cost! Ig you write this yourself, please share what you find. The world of images and color are both subjects that interest me. Trying to help, Ben a href=http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101RPAGEID=261HRedirected=TrueHUserId=101_3529RFORMNUMBER=6;Ben Rayner/a a href= http://volt.ni.com/niwc/common.jsp?page=products_certification_cldnode=10638; Certified LabVIEW Developer /a www.DSAutomation.com
Re: How to list files from directory in list box?
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101RPAGEID=135HOID=50650008000AC4UCATEGORY_0=_49_%24_6_UCATEGORY_S=0
set vi icon invoke node
The invoke node in LV7.0 (windows) has a Get vi icon and a Set vi icon property. The Get vi icon works just fine (can save bitmaps to files etc). But I can't get the Set vi icon to work. Even if i wire the output from one Get vi icon directly to the input of a Set vi icon, nothing happends. What am i doing wrong? Thanks
Re: multiple images
I Ben the extension of this file is .llb, is this a valid LabView extension ? I will try this method and see if I can get it going. my approach to this was to build a main VI with the main schematic drawing of the system and then use sub VIs to just change the valves and switchs but the idea of changing the hole screen at once seems a good idea if I can get it smooth enought. thanks Luis
Re: xy graph point tip strip
Well not exactly like Excel but Excel cheats and limits you to 65535 samples in a plot! The built in functionality you should investigate is the cursor legend. That is available from showCursor Legend You can resize the cursor legend as you see fit. The cursors can be set to snap to a point on a plot and the cursor legend will show the X and Y values of where the cursor is positioned. You can drag the cursor or use the arrows to move teh cursor one step at a time. I have written custom code that will do the mouse over thing but that is over-kill in most cases (mouse overs can kill most processors!). I hope this help, Ben a href=http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101RPAGEID=261HRedirected=TrueHUserId=101_3529RFORMNUMBER=6;Ben Rayner/a a href= http://volt.ni.com/niwc/common.jsp?page=products_certification_cldnode=10638; Certified LabVIEW Developer /a www.DSAutomation.com
xy graph point tip strip
I am using LV6.1 with Win2000. I would like to have the mouse pointer show the value of a point on an xy graph like Excel does. Is there a way to do this?
Re: multiple images
A .llb is a library for LV. I usualy avoid /llb's but that example was intended for demonstrating dynamic instanciation of VI's. That meant I had to make sure all the support file where present to work correctly. The .llb was just a convienent way of solving the problem when I posted the example. .llb's can be thought of as a LV folder (becuase that is what they are!). Ben
Re: Creating an executable program to control a machine
To create an .exe, you need the application builder. It is included with the Professional versions of LabVIEW or you can purchase it separately as an add-on. I think the current price is U$995. The app builder inlcudes an installer that you can use to package the .exe and any support files that you might need.
Re: I have a digital storage oscilloscope tektronix 2430,and an...
Go A href=http://ni.com/support/gpib/versions.htm;here/A and find the exact model of your GPIB board and get the correct driver for it. Your LV 4 CD probably has a driver that will work but not all OS's are supported by all versions so you're going to have to make some decisions there as well. If you can get the GPIB driver installed, then any of the LV versions you mention should work OK but try the latest first. Instrument drivers are currently available for only LV 6 and 7.
How I can open Labview6.1 files form Labview5.1, or how to...
How I can open Labview6.1 files form Labview5.1, or how to save file using 6.1 in order to open it by 5.1 I tried save with options but there are only 6.0/6.1 versions but no prior. How I can convert files from LV6.1 to LV5.1?
Re: How I can open Labview6.1 files form Labview5.1, or how to...
You will at least need LV 6.0.X to do the conversion IF POSSIBLE! There were many features and functions added between 5.1 and 6.1. None of these are backward compatible. If you have 6.0.x then first do a save for previous from 6.1 the 6.0.x then repeat uisng LV 6i. Ben
Re: set vi icon invoke node
invoke node save instrument. without diagram is false. I do not think loading FP is required. Ben
Re: set vi icon invoke node
Thanks I think my problem was that i didn't understand how the function-node worked. What i was trying to do was to 're-icon' several bunches of files while re-naming them in LV. I have several source files that was to be copied to a lot of target files with slightly different names and correspondingly icons (using the picture tool). It worked when using the invoke node to load the FP, then set the new icon, then use the save instrument node and finally close FP node (not sure if i actually have to load FP?). I thought the Set Icon node would actually 'Set' the icon, it didn't occur to me that the vi had to be saved for the icon to stick.
Re: OLE LabVIEW
Werni, OLE ist dasselbe wie ActiveX. Microsoft hat dies umbenannt - entweder ein dummes Verwirrspiel oder ein strategischer (Marketing)Einfall - egal. Jedenfalls kannst du mit dem ActiveX Interface von LabVIEW die OLE Controls ansprechen. Microsoft's MSDN gibt noch mehr Infos z.B. a href=3Dhttp://msdn.microsoft.com/library/default.asp?url=3D/library/en-us/d= naxctrl/html/msdn_actxcont.aspMicrosoft ActiveX Control Overview/a Oder bestimmt findest du geeignete NI LabVIEW Beispiele um den Einstieg zu finden. Welches Steuerelement von OLE m=F6chtest du denn ansprechen? Hoffe, dass et etwas half. Roland
Purchased 6025E, Demo Labview, need example to eval
Hello All; If I may ask for your guidance please? We have purchased a 6025E card and want to evaluate which direction to go. Our plan is to use the demo of labview 7 express first to develop a simple test, and then use the labwindows demo to develop and evaluate the same test. This would give us a good feel (we thought) for which product we want to purchase. Our problem appears to be that without a license (Labview or LabWindows) we can only modify an existing task, channel, or scale according the measurement explorer. We are not sure what that (Message from ME) really means except that we are left to wonder what it means not having experience with the products. We need an example program that we can use directly or modify for the 6025E card that will give us a sense of what the test programming will be like in Labview 7 express. Our test scenario is to set a state, read our inputs, wait a period of time, change state, read our inputs, wait a period of time. We would like to use a spread sheet form to control the output states and compare the input states against, as well as set the period of time for each state. Setting a state includes setting the direction register for those ports or bits that can be set. If this is an easy demo or if it already exists in a state that we should be able to use and evaluate then please point us to the right location or source. Our operating system is Windows XP Pro, internet connected, and can be set to host for GOTOMYPC or Windows remote assistance should there be an active interest in getting us going. We have a contractor in house whose job it was to set up a demo test but we are afraid that we shackled his efforts by not having the software already purchased. Is this a fair assumption? Your thoughts, assistive actions, and criticism is welcome. Sincerely, Rob Roy
how to get the selected items from listbox
Regarding listbox i have two questions 1) I want to get the selected items as per the order in which ihave selected.Presently i'm getting in the ascending order.For example after selcting the 1,2,6 if i select 3 then its giving 1,2,3,6.But i want it in the order 1,2,6,3 2)I want to select items from a single list box to many other listboxes.(ie) my first selection should goto first,second one to the second listbox and like this.How should i write the logic. please give me a suggestion.
Re: Labview ausführbare Applikation
Hallo Fahri, du brauchst entweder den Application Builder oder die Professional Version von LV um Anwendungen zu erzeugen. Der Application Builder kann auch einen Installer erzeugen, mit dem auch andere Dateien, die zur Anwendung geh=F6ren, z. B. Konfigurationsdateien, hinzugef=FCgt werden k=F6nnen. Waldemar
