Need help reg labview control *.ctl

What are the uses of creating labview controls i.e. *.ctl and how to do this?
thanks in advance.

The simple answer as ssk pointed out is that it will save you lots of time using a custom control because when you need to modify it, you only need to change the master.
To create one, simpy select under the Files menu, New, and browse to the bottom to select Custom Control. See attached image.
FILES>NEW>Custom Control
Message Edited by JoeLabView on 10-03-2007 08:01 AM
Attachments:
customCtrl.PNG ‏40 KB

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Need help writing Labview Program!!!!!

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Need help reg SUBTOT

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I am using slis_sortinfo_alv for doing subtotal in a report,but the problem is i even wat to display some text like 'Subtot'before the value.
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Hi,
Make use of the below statement :
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Hello –
Something that you need to consider is the fact that when you are sending an image over Data Socket, it is not really the image what is being transferred but a pointer to the image. Please take a look into this Knowledgebase.
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Need help with LabVIEW code for motor control.

Hi,
My name is Sasi. I am a BME grad student working on my thesis topic of evaluating spine implants for low back pain. For this I am building a test machine that would apply pure moments to a spine specimen. I am using LabVIEW 8.5 to implement control of a brushless AC servo motor. My requirement is,
Step 1: Initialize the motor.
Step 2: Start moving it at a uniform RPM to the right (This RPM value too user can enter).
Step
3: While doin Step 2; simultaneously read torque cell data (Using DAQ
asst.). DAQ o/p is from 0 V to 10 V; 0 V being -10 Nm n
10 V being +10 Nm
Step 4: When Torque value reaches +10 Nm, i.e 10 V, the motor stops.
Step
5: From the position where motor stopped (i.e no need to reset to
initial position) Start moving in the opposite direction at the same
uniform RPM as in Step 2 while reading torque cell data.
Step 6: Once again when torque reaches -10 Nm, i.e. 0 V, the motor should stop.
Step 7: Repeat 'Step 2' to 'Step 6' 3 times.
Step 8: Reset motor postion.
Till now I have managed to get the motor to move forward n backward @ a desired vel, accl, n deceleration for 3 cycles. I am attaching my code. I am having problem inserting the code for reading DAQmx amidst all this. Can anyone help me out.
Thnks,
Sasi.
Solved!
Go to Solution.
Attachments:
Test_012609.vi ‏35 KB

Hi Sasidhar,
I took a look at your problem and I think I have a workable solution for you. I definitely agree with Lynn's suggestion of using parallel loops. This will allow the DAQmx portion to run uninhibited by the motion portion, and vice versa. Plus, you only need to iterate the motion loop whenever the voltage level crosses a threshold. So, by iterating on the motion code in the same loop that you are iterating on DAQmx code, you are essentially wasting processor.
I created a VI that should do what you are wanting. I tested it out myself and it works great. You might have a tweak a few things to apply to your system (like motion board ID and DAQmx physical channel, etc.). I used two parallel loops and event-based programming. Basically the motion loop starts the motor spinning at the specified velocity. Once the motor is spinning, it waits for the DAQmx loop to tell it that the voltage value has crossed the threshold. When the voltage value exceeds the maximum threshold (which I set to a value slightly less than 10 to allow for jitter and saturation), the DAQmx loop signals the motion loop that it can finish its iteration. The motion loop stops the motion, reverses the direction, and starts the motion again. Once motion has started, it again waits for the DAQmx loop to tell it that a threshold has occurred, but this time, it is looking for a minimum threshold. I used "Occurrences" to implement the event-based programming in LabVIEW.
I have commented the code rather thouroughly, so hopefully the comments will answer any remaining questions. The benefit of using event-based programming for this is that you save processor time, and your motion is more closely synchonized with the DAQmx. Instead of iterating the motion loop as fast as you can, checking for updates each time, you just pause it, and wait for the other loop to tell you when to start up again. In the mean time, the processor doesn't have to worry about iterating that loop over and over again. Also, when the occurrence does occur, you catch it immediately, instead of having to wait until the next iteration. Thus, you are more closely synchronized with the DAQmx portion of the code.
I hope this will help you. Please post back if you have any questions about the code or its implementation. Good Luck!
Message Edited by Wes P on 02-03-2009 05:18 PM
Wes P
Certified LabVIEW Developer
Attachments:
Motion and DAQ.vi ‏59 KB
DAQmx Loop.png ‏24 KB
Motion Loop.png ‏17 KB

Need Help w/Labview

I need urgent help on a program that I am suppossed to design using
labview(5.1), in conjuction with circuit boards designed by national
instruments. The program calls for controlling Eurotherm 818
temperature controller and National Instruments ER-8 relay control
board. Both controls use digital and analog I/O board designed by
national instruments. I appreciate all the help I can get.
Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't.

Check out the Functions>>Structures>>While Loop. You can set the
condition and wire it to the stop, or you can use a boolean switch.
Beware, though, if you use the latter, wire it to an inverter and then
to the stop.
Hope this helps.
Jon A. Rinkenberger
Atmospheric Physics Research Laboratory
Physical Science Department
Embry-Riddle Aeronautical University
Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't.

Need help finding a control

I want to list all of the connectors on a board on a vi front panel (e.g. J1, J2, etc...). If the user clicks on e.g. J1, all of the pins on J1 will be displayed, like when using a treeview. The user will then be able to select multiple pins from J1 (e.g. he/she clicks on J1-1 and J1-3). Whatever pins are selected I will set high. I thought I'd be able to put multiple treeviews on my vi, one for each connector, but it seems that with a treeview no more than one selection can be made. Basically I need a control that is expandable and multiple selections can be made. Is there a control that does this?
Thanks and regards

Could you please draw us a picture (text is fine) of approximately what you are looking for.
It sounds to me, if I read your question correctly, that a text indicator will do the trick.
For example:
Before:
J1
J2
J3
J4
After J2 selected:
J1
J2
Pin 1 -
Pin 2 -
Pin 3 -
Pin 4 -
etc...
J3
J4
This can be done with a bit of work using a simple string indicator, a table, a list, etc.
For a string indicator, you would detect the selection by either polling the selection and an "Okay" button, or using a mouse up event on the control then checking the property corresponding with selection.
List indicators may be easier to work with programmatically, but I don't know if they are any cleaner looking. I suspect they are
probably the same. I can whip up a simple example if you wish...
I hope this helps
-Mike Du'Lyea
Advanced Test Engineering
http://advancedtestengineering.com

I'm new to flash and need help with some controls

I'm builidng a site that has a portfiolio of work to display.
When the visitor arrives at the portfolio page he (or she) is
faced with a split panel. The right panel displays a summary of a
client and the work. The left panel displays the work examples
attributed to that client. By clicking forward and backward arrows
in the right panel, the visitor can call the summaries of the
different clients. Landing on a client page 'opens' a separate swf,
called using loader component, that contains the portfolio of that
client's work into the left panel
1. I want forward and backward arrows located on the main
movie in the left panel to control the progress of the loaded swf,
rather than using forward and backward arrows on the loaded swf.
2. I want to prevent the forward and backward arrows in both
panels from clicking beyond frames in the Portfolio area of the
timeline.
3. I want the backward arrow to be innactive on the first
frame, and the forward arrow to be innactive on the last frame.
I have no problems making the arrows work on the main movie
controlling the client summaries. What I don't know how to do is
make them control the movement of the loaded swf, or #2 and #3.
Any help will be greatefully appreciated. Thanks in advance,
Art

"Art Lazaar" <[email protected]> wrote in
message news:[email protected]...
> Tralfaz,
>
> Thanks for your response. I must be missing something
very simple here, but I
> can't make this work no matter what I do. Let me see if
I understand some of it:
>
> On my main movie I put the fwd_btn and rew_butn
codes...do I put these on the
> actual buttons, or in an actions time line? When I put
them on the buttons, I
> get an error report saying they need to be in an 'on'
event handler. I thought
> that's what 'onRelease' was.
>
> On my loaded movie, I place the 'one.swf' code. I'm not
sure what you mean by
> placing the code inside a loop, I don't seem to be able
to find a reference to
> using 'loop' anywhere. When I use an 'onEnterFrame', I
presume I do that with
> onEventClip(enterFrame). When I do that, if I run the
'one.swf' by itself, i
> get an error report saying onEeventClip is for movies
only. But there's no
> error report when it loads from the main movie. What
happens tho' is it loops
> continuously, even if there are stops() in it.
>
> Boy, am I confused ;)
>
> I am really baffled by this seemingly simple little
task. Your help is
> gratefully appreciated.
>
> Art
>
>
>
Hi Art,
There are different coding methods, depending on where you
put code..
1) Frame code
Click on a frame of the timeline to enter frame code
2) Attached code for movieclips and buttons
Click once on a movieclip or a button then enter attached
code
To make an onEnterFrame event for a movieclip, first chose
either frame code or attached code method. I personally rarely ever
use
attached code because it hides code in places that can be
hard to find. Almost all my coding is frame code, but it's a
personal
choice.
Frame code method to make an onEnterFrame for the main
timeline..
// put this code into a frame on the main timeline
this.onEnterFrame = function()
// do something once per frame at the frame rate
checkMyButtons(); // once per frame we will check on the
button status
OR
Attached Code method to attach an onEnterFrame event to a
movieclip
// click once on the movieclip (don't dbl click it .. stay at
the root timeline level)
onClipEvent(enterFrame)
// do something once per frame at the frame rate
Those two types of code are not interchangeable. One type
must be entered into a frame and the other style must be attached
to a
movieclip or you will get errors.
Then there is the DOT syntax way to write frame code that is
equivalent to attaching code..
myMovieClip.onRelease = function()
trace("release");
myMovieClip.onPress = function()
trace("press");
myMovieClip.onDragOut = function()
trace("drag out");
tralfaz

Need help regarding tree control

hello guys,
i m working on one Flex slideshow application and i m using Xml loaded tree control with swf loader for this. i want to create next previus button for nevigate this slideshow but i dont know much about action script... please help me
i will provide u code of my script if you need to correct it or suggest me how to make it.
thanks in advance
sagar

here is sourcecode of my file
<?xml version="1.0" encoding="utf-8"?>
<mx:TitleWindow xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" showCloseButton="true" close="PopUpManager.removePopUp(this);" width="1366" height="768" title="Promotions" fontFamily="Verdana" fontSize="13">
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                    panel1.status = "";
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                var children:ICollectionView;
                var suffix:String = "";
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                    children = tree.dataDescriptor.getChildren(item);
                    suffix = " (" + item.children().length() + ")";
                return item.@label + suffix;
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                panel1.status = (swfLoader.bytesTotal/1024).toFixed(2) + 'KB';
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                    systemManager.stage.displayState=flash.display.StageDisplayState.FULL_SCREEN;
        ]]>
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        <mx:XML id="dp" source="data/dp.xml" />
   <mx:Canvas x="30" y="-1" width="1315" height="725">
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                height="712"
                backgroundColor="white"
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                borderThicknessBottom="0"
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                borderThicknessRight="0"
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                    scaleContent="true"
                    complete="swfLoader_complete(event);" />
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            </mx:ControlBar>
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<mx:Move id="panelOut" target="{panel}" xTo="0" effectEnd="btn.label='Close'"
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      <mx:Grid x="10" y="10" width="299">
         <mx:GridRow width="100%" height="707">
            <mx:GridItem width="100%" height="100%">
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                    labelFunction="tree_labelFunc"
                    showRoot="false"
                    width="269"
                    height="706"
                    itemClick="tree_itemClick(event);" alpha="0.85" backgroundColor="#C0E1FF"/>
            </mx:GridItem>
            <mx:GridItem width="22" height="100%" verticalAlign="middle">
               <mx:LinkButton label="" id="btn" width="22" height="707"
                        click="toggleBtn(event)" icon="@Embed(source='assets/index.png')" enabled="true"/>
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        </mx:Canvas>
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Need help with Labview code for DAQmx

I'm currently trying to write Labview code for some thesis research and am having problems. I'm using the cDAQ 9172 with strain gage modules and two voltage input modules. I'll be reading/recording a voltage from an external source on one channel, while recording strains and accelerations with the other channels. I need to do all this simultaneously.
Everything I've done to this point has been in SignalExpress so I'm not sure how to program any of this. I also need to be able to calibrate the strain gages prior to each set of recordings. Any help you guys could offer would be greatly appreciated. Thanks.

Hi,
I'm not sure how much this will help you, but I've attached a screen dump of code from a project I did that sounds pretty similar to what you're working on. The code is from a subVI that I used to create the daqMX measurement task for my data acquisition. I was also using a 9172. This was written in 8.5, but the only thing that you may not have access to is the functions for null offset and shunt cal of the strain gage channels. Hopefully this will at least get you started on your way to setting this up.
Andrew Carollo
Attachments:
create task.jpg ‏208 KB

Need help with Referer Control 0.4.3 add-on

Hello,
I can't seem to make this add-on work as I expect, and I can't find any way to contact anyone, except maybe here. If there is a better place to get support for Referer Control 0.4.3, please let me know :-)
It doesn't seem to work as I expect, although it's entirely possible that I don't clearly understand how it's supposed to work. Afaiu, it's supposed to change how the referer header is handled, when you click a link to go to another website. It puts a dropdown list on the toolbar, with several choices for what to do when you follow a link. So you can change it as needed, per website. It's default setting is "remove" which means (apparently) to remove the referer header before sending the request (which I guess they say makes it ready to go "out of the box").
Before I found this add-on, I had changed network.http.send.RefererHeader from 2 to 0 (in about:config). The only website where I had trouble, is Launchpad.net. Without setting it to 2, all I can do is view the website. If I want to post a comment, or search the site, I would have to manually change the referer header control in about:config. So I thought this would be a good website to test the add-on. (When I would try to post a comment or search the site, I would get an error message about the referer header.)
So when I found this add-on, I put it back to 2, assuming that the add-on is now going to block the referer header from being sent. I went to Launchpad.net (https://bugs.launchpad.net/inkscape) and with the new add-on's dropdown control list, set to "remove", I'm still able to do anything I want, without getting an error message about the referer header. So it seems like the add-on just doesn't work.
Out of curiosity, I opened about:config so I could look at what happens to network.http.send.RefererHeader when I change the add-on settings. But apparently, it works in some other way, than altering about: config, because no matter which control option I choose, the referer header stays on 2.
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Can anyone help me with this Referer Control 0.4.3 add-on?
(https://addons.mozilla.org/en-US/firefox/addon/referrer-control/?src=ss)
Thank you very much :-)

Oh, thank you Moses. I could not find that profile page. I found a website, but is all in a traditional Asian language (pretty, but I can't read it).
Thanks cor-el. I will try to search out some info about that. (I do understand, in general, what a cross site request/referer is.) The add-on under discussion probably does more than just prevent the cross site scripting, etc, assuming I can get it to work.
Now that I've got an email address, hopefully I can get some questions answered.
Thank you all very much.
Off topic, but the marking of a particular message that solves the problem is really rather annoying, at least it is to me. Most of the time, there are several replies from different people, which together provide the solution. I just don't understand how this feature is helpful. But of course, I try my best to choose 1 reply ;-)

LabView Control (.ctl) to VB Structure

I created a control in LabView. My LabView
code writes data of that type to a binary file. I want to read this
data into a VB Structure.
Can I do this programmatically,
or do I need to manually create a corresponding structure?

One end or the other will have to do some translation of the data. Are you saving clusters? If the data type is a simple type such as an integer or a double or an array of this type you should be able to read it directly. If it is a cluster than you will have to do some translation. Which side you do that on is up to you. Also, the write to binary VIs can place some header information (namely the array or string size) so you either have to not write this data or account for it in your VB program if you will perform the translation on that end.
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Need help inserting ActiveX Control

We provide an ActiveX control to talk to an instrument. We sell very few of these but nonetheless I've been asked to upgrade the LabVIEW sample (even though it only accounts for 10% of our few sales). I did make a sample a long time ago for labiew 5.1 but was going to make a new one for labview 2011 (as its too difficult to import the sample from 5.1).
For testing (and that I'm not releasing any proprietary stuff) I wrote a simple ActiveX control that contains some of the features of the instrument control. This includes going to a particular position, scanning between two positions and receiving events (data, message and status). I was very easily able to write a quick demo in VB6 and C#2010 but I've forgotten everything about labview (except I remember it was relatively complicated for a non-graphical programmer like myself to use an activex control back in the 5.1 days).
I would like to make a simple demo (like the one for C#)
On a button press it starts a collect, first taking the two values from the appropriate inputs as the range (sets the StartPos and StopPos properties) then calls BeginRun.
On another button press it "goes to" a position (calls GoToPos with a parameter from another numeric input).
Receives OnStateChanged events and displays the enumerated type in a string indicator. This event is fired when the state is changed (eg. by calling BeginRun).
Receives OnData events and displayes the position and value from the event in an indicator. This event is fired during a run for each sample.
Receives OnMessage events and displays the message string in an indicator. This event can occur any time - in this sample I'm firing it randomly about once per second and its just sending the time as a string.
Events are asynchronous - calling BeginRun returns immediately but events will follow later.
Can anyone help me build this simple example - I've forgotten all the (little) labview I did back in 2003. I've attached the ActiveX control (XTestControl.ocx) a very simple VB6 sample, a better compiled C#2010 sample and my fiddling, far-from-complete LabVIEW 2011 sample. Everything is 32-bit (although I'm running on 64-bit Win7).
There's a lot I don't understand about LabVIEW and the time I've already spent on this so far probably means several years ROI for the small company I work for because of the low volumes.
TIA
Attachments:
ActiveXTest.zip ‏277 KB

Thanks for your reply nathand and taking the time to look at my sample.
Yes, it is a very ligh VI because it doesn't have to do much. I want to numeric inputs that set the StartPos and StopPos properties of the ActiveX control and then call the BeginRun method (ie. 3 controls). Data is returned in the OnData event asynchronously and displayed (ie. 1 numeric display). I'me used to programming with the likes of VB and C# where events are a matter of course and you just select the event you want to code for and write the code so all this talk of "separate VIs" and "User Parameter List" is all confusing to me. The VB and C# samples I provided literally took me 15 minutes to write both and I won't tell you how embarrassingly long I spent playing with labview. From memory in (HP) VEE it was relatively easy to make a basic demo using our ActiveX control but we won't be supplying a demo for that this time (or possibly the old demo still works). This is supposed to be such a basic labview sample being provided by the vendor (our small company) as you suggested.
I downloaded the 30-day LabVIEW 2011 trial, which I was assuming had proper "event structure" but its counter-intuitive to use.
I've modified the attached control slightly (put a Run button on and a CallBack VI thingy) but I don't know how to wire up the run button to do something when clicked nor the event output to the (string) display.
Attachments:
ControlTest2.zip ‏15 KB

Need help reg sender JDBC adapter

Hi,
I am having a requirement like, i need to fetch the data from two data base tables. and after fetching the data, i need to update those two tables.
For selecting the data from two tables, two select statements i need to write, how i can give two select statements in sender JDBC comm channel.
In sender JDBC channel, only one update query we can give...how i can update two tables?
Regards,
Venkata Ramana.

Hello Venkat,
For your requirement, go for stored procedure and find the below thread.
Fetching data from JDBC without using JDBC sender adapter
Re: Executing an Oracle Stored Procedure from Sender JDBC adapter
Re: Sender JDBC adapter not picking up data
Re: Retrive data from two diffirent tables
hope this will help you
Thanks,
Venky

I need help in tabstrip control....helpful answers will be rewarded....

Hi All,
I am finding difficulty with the tabstrip control.i have created 3 tabs one for mara,marc and mard tables.i have to display few fields of these tables in their respective subscreens.using the material number i have to get the values from the table and display it in the respective subscreens.i am getting the output.but if i try to give another value for the material number it is not accepting...it holds the same value i gave before.i tried to use refresh,clear to clear the internal tabes i am using to fetch data.but i am not getting it....also
i want to use f3 function key to go back even if i havent given the value for mandatory fields. can u help me?helpful answers will be rewarded....
regards,
sheeba.

Hi,
http://help.sap.com/saphelp_nw70/helpdata/en/04/10f2469e0811d1b4700000e8a52bed/content.htm
http://help.sap.com/saphelp_sm32/helpdata/en/d1/801bd2454211d189710000e8322d00/content.htm
Check think link:
http://www.****************/Tutorials/ABAP/Tabstrips/page1.htm
http://www.sapdevelopment.co.uk/dialog/tabcontrol/tc_basic.htm
Regards,
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Need help reg labview control *.ctl

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