Labview& NI ELVIS

Hi to all,
I connect 1-phase supply to a diode bride full wave rectifier with R-L load
through voltage sensor(LV-25P) and current sensor(LA-100p). I take the source
voltage and source current and connected to analog channels of NI ELVIS.
Through NI ELVIS device Iam able to see the waveforms in Labview. I use normal
labview but not Labview real time.
Then I use transport delay block to delay the waveform by 90 degrees but I am
not getting the delayed waveform.
I am attaching the circuit , please go through it & tell me what i have to done
to delay the signal which I has taken through NI ELVIS.
Finally Is it possible to find out the harmonics in the source current which
i has taken through ni ELVIS if i build the control circuit either in normal
Labview???? or in Laabview Real time???
Waiting for reply.
Thnks in advance
Attachments:
ElvisII expt1(V and I) pra.vi ‏324 KB

Good it wanted to know since I can make move an engine using labview and N I ELVIS

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Error 2 when starting LabVIEW from ELVIS Instrument Launcher

I have a WinXP Pro SP2 box that's running LabVIEW 7.1 (academic license) and NI ELVIS 2.0.1.
When I perform the following steps,
1) Log on to the WinXP machine as a user who does not have Power User or Administrator privileges.
2) Click on Start > All Programs > National Instruments > NI ELVIS 2.0 > NI ELVIS
3) Wait for the "ELVIS - Instrument Launcher" application to finish initializing.
4) Click on the "Launch LabVIEW" button at the bottom of the ELVIS - Instrument Launcher window.
I immediately get an error dialog that says
_dialog_box_text_
Error 2 occurred at System Exec.vi. Command
was "LabVIEW.exe:\ "C:\Program Files\National
Instruments\NI ELVIS 2.0\ELVIS - LabView
Launcher.lib""
Possible reason(s):
LabVIEW: Memory is full.
NI-488: Write detected no Listeners.
["Continue" button]
_/dialog_box_text_
[n.b. The characters ":\" that immediately follow the LabVIEW.exe program name (see above) are not a typo on my part. Those characters are shown on the Error 2 dialog box.]
It seems unlikely to me that the ELVIS - Instrument Launcher application has run out of memory. The host machine has 512MB of physical memory and the ELVIS - Instrument Launcher application is the only (user-layer) application. The Windows Task Manager (via a "3-finger salute" - Ctrl+Alt+Delete) indicates ample memory resources are still available when the Error 2 dialog pops up.
For what it's worth, if I perform steps 1 thru 4 above while logged on as a WinXP administrator user, I do not get the Error 2 dialog. I get instead the "NI ELVIS - LabVIEW Launcher" dialog which offers the following 3 choices: View NI ELVIS Examples; View NI ELVIS Instrument Source Code; Open LabVIEW.
Is there anything I can do to correct the Error 2 problem for non-administrator users?

Hi,
Well since it works as an admin, I am assuming there is a problem with you being an admin all the time. If there is, then I would suggest giving full sharing privileges to the National Instruments folder, to whichever user you are. See if that works. Let me know.
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Hello Labview elvis daq
You can measure multiple NSRE simultaneously, just connect your higher potencials to the aiX and all the lower potentials to the aisense.The maximun number of channels will be equal to the number of Analog inputs that your device has.
Warm regards,
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Whenever I run my vi one time and run it again for a frequency sweep it sometimes shows an error
Possible reason(s):
Resource requested by this task has already been reserved by a different task.
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What does this means?
here is an image of my block Diagram
Attachments:
Bode_Plot.png ‏46 KB

Impact -
With the NI ELVIS Function Generator, the output impedence is spec'ed
at 50 Ω guaranteed. You can find the block diagram from the
Function Generator on page A-6 and C-6 (Appendix C: Theory of
Operation) of the NI ELVIS User Manual.
NI Educational Laboratory Virtual Instrumentation Suite (NI ELVIS) User Manual - http://digital.ni.com/manuals.nsf/websearch/11E6BA4103D9ADD086257103005C97E0
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NI Elvis throwing error 7, NI 488: Non existent board, NI Elvis traditional throwing error 2, NI 488: Write detects no Listeners when attempting to launch labview

I wrote a program on a laptop in our lab that used both the NI Elvis power supplies and DMM. On the laptops in the lab, which connected to NI Elvis through a board in the NI-PXIe device the program worked perfectly both as a vi and as an executable. The program needed to be put on some computers in another lab for student use with a different version of labview, and everything worked except for the variable power supplies. I activated debugging and it reported Error 7 at New File, NI 488: Non-Existent Board. After attempting to trouble shoot this and not finding any helpful results I attempted to rewrite the program on the computers directly, since I could only put the program on the computers as an executable since it was written in 8.6 and the computers only have 8.0 and 8.2. To begin I was going to launch labview from NI Elvis to use one of the example codes as a base for my program. When attempting to do this I got Error 2 with the possible causes being Labview memory full and NI 488: Write detected no listeners. My question is are the two errors related, and how can I fix these errors? All the NI Elvis software is 2.0, the original program was written in Labview 8.6, the computers have Labview 8.0 and 8.2 on them. The NI Elvis devices are connected directly through the computers, rather than through another device, I'm not sure if this might be causing some obscure hardware issue.

Hello Chris,
It looks like this error is associated with not having administrator privileges. Take a look at this other forum post for more information:
http://forums.ni.com/t5/Academic-Hardware-Products-NI/Error-2-when-starting-LabVIEW-from-ELVIS-Instr...
If you can log in as an administrator you should be able to avoid getting error 2 when you launch LabVIEW from NI Elvis. Alternatively, you can upgrade to NI-ELVIS 3.0, because the issue is fixed in that version of NI-ELVIS. You can find this by going to ni.com/support and searching for "NI-ELVIS 3.0"
Colden

Error 9302 occured at NI ELVIS VPS-close.vi

I tried to make an analog to digital converter using labview and
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Thank you for contacting National Instruments.
It is very likely that the reason you are experiencing this problem is because you are using a M Series Data Acquisition board with the NI ELVIS.
There is a great KnowledgeBase article that explains why the courseware VIs won't work with your device, and offers replacement VIs that do work.
Michael P
National Instruments

Mydaq usb connection - lost immediately

Hello,
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After unplugging, and replugging in the unit, I hear an audible sound from windows 7 confirming a new device has been connected (same sound as when plugging in a USB drive), and within 3 seconds, another sound is heard, (same sound as when unplugging usb drive).
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HI,
Just to let you know of my experience. I had the same problem as you . It kept loosing connection and making a sound every time it lost connection, very frustrating.
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Works fine now

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I am trying to install the ELVIS system on multiple computers. LabVIEW 8.2 has already been installed on all of the computers. I am trying to install the CD that accompanied the ELVIS as well as the PCI card. However, when I install both of them and try to run ELVIS an error comes up on all the computers with "Unable to locate the LabVIEW Run-Time engine"
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When you tried to unistall LabVIEW and ELVIS in your Windows Control Panel, did you make sure to select the National Instruments folder under the list of programs first? Also, do you have any other National Instruments software installed on your computer? If you navigate to the National Instruments folder in Control Panel and still do not see your LabVIEW software, please e-mail or call into support. We will be able to send you a special utility which will remove your software even if it doesn't show up in Control Panel. It sounds like this issue would be fixed by a reinstallation. Thanks!

Stoplights.vi

dear all,
I am trying to open the example in "intro to ELVIS" file but somehow it is executable because some of the vis can not be found. Does it require installing any add-on toolkits? Or is it because the LabVIEW or ELVIS I installed are not working properly? Thank you very much for your help in advance!!
Jia

amisare,
You are correct. The
stoplight.vi is an example and uses the ELVIS driver. The ELVIS driver is installed in the
instr.lib directory.
1. What
DAQmx VI’s is LabVIEW asking for?
2. Do you have multiple versions of LabVIEW?
3. Did you encounter any errors when installing
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4. When reinstalling did you uninstall the DAQmx
driver first?
If you perform a reinstall with the current driver still on
your system then the installer will recognized that and it won’t over write any
of the DAQmx driver files. I hope this helps.
Message Edited by Ryan N. on 03-31-2008 10:55 AM
Ryan N
National Instruments
Application Engineer
ni.com/support

Measure current and voltage in Elvis and labview

Hi! We're setting up a control system setup for class where we need to monitor the current and voltage that we are supplying/drawing from the ELVIS hardware within a LABVIEW setup. So far, we can accurately display voltage input and outputs from the AI and DAO terminals respectively. However, we can't seem to find a direct way measure current draw. I believe that we are supposed to be able to get DMM readings from the AI5 channel, but either we're not doing it correctly, or we still need to place a known resistance across it (which we cannot do, due to variable loads). Any advise please?
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Are you using Elvis I or II? From your post, I will assume it is Elvis I but please correct me if this is not the case. Page 38 of the manual shows that ACH5 is used for capacitor or diode measurements for the DMM. To measure current, use the connectors on the front of the Elvis unit and then route the current HI/LO on the protoboard to either the oscilloscope or an analog input channel. You can use the DMM Soft Front Panel to monitor current as well.
Message Edited by h_baker on 07-09-2009 04:54 PM
Regards,
h_baker
National Instruments
Applications Engineer
Digital Multimeter Resources

Output labview array to LED grid using DI/O on Elvis II??

I have been working on a project. I am attempting to use the DI/O on the ELvis II board to power an 10x6 LED grid similar
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http://www.appelsiini.net/2011/how-does-led-matrix-work
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Generate digital pulse from your D I/O to control the relay. With Digital High State, the mechanical arrangement will connect the COMM to "NO" .... and you will get your programmable Ground. (in your case NC is not necessary I hope)
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Attachments:
Relay.PNG ‏8 KB

Does anyone know how to use ELVIS in Labview to get current and voltage measurements?

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ELVIS 1 AND ELVIS II LABVIEW VIs COMPATIBILITY

I am currently working on a project that was previously using Labview (8.5.1) vis built for elvis I, we have now moved on to Elvis II and are experiencing problems that are believed to be steming from the differences in channel configurations. Could some one be as kind to avail channel configurations for both elvis I and Elvis II and what modifications we may need.

Hi,
First, I want to reference you to the support page for the NI ELVIS II and its help manual.
NI ELVIS II
http://sine.ni.com/psp/app/doc/p/id/psp-458/lang/en
NI ELVISmx Help
http://digital.ni.com/manuals.nsf/websearch/825085B4A34566818625745F006DF0F8
I want to verify what exactly is going on in your program when you upgraded to NI ELVIS II. Are there any errors you are seeing? Are you able to get it working in Measurement and Automation Explorer? Also, what drivers are you currently using?
Regards,
Jordan F
National Instruments

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Hello,
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When adjusting the time division, the waveform is not squeezed or stretched as it normally would.
The waveform stays the same, and the time division lines move! And if I decrease the time division below a certain value, the display itself shrinks.
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You can veiw the distance VI's here:
http://elvis-test.cecn.sabo.mtu.edu/oscope_test.html
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Hello,
When you installed NI-ELVIS library under LabVIEW 8.2, those
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Respectfully,
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What is the proper way to set up an encoder on an Elvis prototyping board with Labview 2010?

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Attachments:
MT-003-datasheet.pdf ‏381 KB

Hi jns0086,
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Have a great day,
Chris
Applications Engineering
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National Instruments

Labview& NI ELVIS

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