I am plotting two 1-dim array in an xy graphic into a while loop
(Reading continuous voltage for two sensors). I need to see the
continuous trace of the plot but I only can visualize the intantaneous
value of x versus y. The graphic is not keeping the trace. I really
appreciate any help. thanks in
I am writing a program in which access to different
screens through different options. The screen change is done
through state-machines, closing the origin VI and opening the
VI at which I enter. The problem ins on the screen changes,
there is an intermediate state of flickering and many
thanks for your ans.
Is it possible to use a while loop to read data, look for a certain
value and upon finding that value start a timer to end the while loop
after a specific amount of time?
If you are using a while loop to read data from various DAQ channels,
upon finding a specific value on one of the channels is
Hi All
I am upgrading some PXI-8156 systems to PXI-8176 systems and upgrading
the PXI-8176 systems to the new PXI-8186's.
To do this I want our IT to create a ghost/image of the harddisks but
they need DOS drivers for each of the above PXI controllers.
Has anybody got the DOS ethernet drivers
I have a lot of property nodes (direct) so all of them will change to
indirect and I need to wire referencees to them. But you are right,
even though it shall take some hours it is worth to try.
kind regards
Pawel
Hi Joe
I have almost the same graphic adapter (G450), so I believe it is not
graphics.
Maybe the idea with copyying everything to another vi and resave will
do the job. I shall consider that.
kind regards
Pawel
Juste pour faire remonter le post , j'ai toujours pas compris comment
marcher ce forum...
Seifert, George [EMAIL PROTECTED] wrote:
I thought I was taking the easy way out by using available drivers with all
the error handling built in. The setup on some GPIB instruments is not trivial
and it's nice to have the examples supplied with the drivers. It still seems
somewhat of a toss up to
Smith, Blair [EMAIL PROTECTED] wrote:
We have a LabVIEW program under strict revision control. Presently, the
code is at the LabVIEW Rev. 5.1 level. We are about to make changes (minor)
to that code. Version upgrades are way beyond scope. My preferred editing
machine is at the 5.1.1f level,
Daniel wrote:
I am sorry bu this question have to be made in Spanish. If somebody can
read it but cannot answer it in Spanish does not matter, I will take the
answer in whatever language is provided.
I am writing a program in which access to different screens through
different options. The screen
G Naveen wrote:
Is it possible to measure the voltage and currents of Power supply
module outputs, Without any cabling change in between test (Human
intervention).
You can't simply take two wires from the PSU to the card and expect to
measure either voltage or current with no switching.
You
Salve, negli esempi vengono riportati dei vi che mostrano come
scrivere e leggere attraverso datasocket ossia come trasferire
pacchetti di dati di un item.E' possibile trasferire pacchetti
relativi a pi=F9 items senza dover inserire per ogni singolo item la
funzione datasocket read e datasocket
Hi all,
I looked through the excel examples that ship with labview. I found
out how to get data into excel cells and read from them. But I still
look out how to create a hyperlink that is connected to a text in an
excel cell. I think this could be done without using the report
generation toolkit,
j'utilise une carte pci 6602 avec labview 7 , pour information les
signaux sont non p=E9riodiques et de l'ordre des microsecondes.
Exemple d'un des signaux =E0 simuler
4 us =E9tat haut, 1.6us etat bas, 158us etat haut, 100.6us etat bas,
2.6us etat haut.
j'ai donc utiliser pour realiser une
Thank you for your reply.
It is true that it is possible to work with TCPIP instrument if the
instrument does not presented in MAX. Unfortunately my task is to
discovery all TCPIP instrument switched ON for performing run time
dynamic instrument configuration.
Mikhail
I have tried this, but it sometimes works and other times not, so , it
is not a good solution for me!!
Thank you!!
Graci
Hi JLV!!
Thank you for your solution, but this vi works . The vi that doesn=B4t
works is entrada_analogica.vi, the first one that I attached. And the
problem is in the the frame 1(0...1), when I write other command and I
try to read the answer, the answer is one byte,and I have to receive
10
Hi all,
I try to use the intensity graph as an xy-input device. The user
should be allowed to drag the cursor to enter the value. However, the
user can always move the cursor outside the plot area, which causes
the corresponding axis to rescale. I want to have strictly fixed upper
and lower
Il me semble que les cartes d'acquisition fonctionnent avec les
exemples NI-DAQ et non NI-TIO. Cherchez un exemple NI-DAQ pour
r=E9alisez la fonction que vous d=E9sirez et testez le !
N'h=E9sitez pas =E0 me recontactez si probl=E8me !
Cordialement,
Julien
I had a similar problem, starting a sub-vi parallel to the system
exec.vi, esp. communicate with a power supply to switch on after my
firmware loader (external apllication) waits for the power-up sequence
of the D.U.T. The problem was to wait for the completition of the
loader for getting any
Sorry for my english ! If you can send me an example, it could be very
useful for me.
My e-mail is : [EMAIL PROTECTED]
Thanks.
Regards,
Filippo
Hello Vanessa,
You must install the newest version of NI-IMAQ IEEE 1394 1.5.1.
You can do that for free by downloading it from :
www.alliancevision.com.
Use the part Number : 850 413 E-03
Sanaa TAZI
Application Engineer
National Instruments
merci ... =E7a marche
Hello,
I'm currently waiting to hear from Anritsu (US) as to whether they
have a definitive set of LV drivers for this RF vector network
analyser.
Meanwhile, does anyone out there have these drivers, or know where
they might be obtained please?
Best wishes,
Matt Rhys-Roberts.
Hi all.
Is there a reliable way to programmatically get know a com port to
which a serial visa resource is bound? E.g. I can see in MAX that
ASRL1 is bound to COM1 but how can I get this info in a VI at runtime?
(LV7.0 PDS, VISA 3.0)
Thanks in advance
Hi kostya,
Using property nodes with your VISA wire, you can get the information
under Interface Information and then Interface Description. This
should give COMx as a string output. I use this to differentiate
between COM ports and LPT ports, something which it otherwise hard to
do.
Hope this
tout d abord merci d avoir repondu aussi rapidement mais j utilise
cette exemple avec le driver NI-DAQ
Est ce que l on peut simuler un signal sans rajouter d'appareil
exterieur tout en fesant varier la fr=E9quence pour diff=E9rents signaux
afin qu 'ils soient synchro et non periodique.
merci,
Diego wrote that Daniel wrote:
I am writing a program in which access to different screens through
different options. The screen change is done through state-machines, closing
the origin VI and opening the VI at which I enter. The problem ins on the
screen changes, there is an intermediate state
Thanks a lot!
For anyone interested: It turns out that the sub-VIs that were loaded, resided in
another version of my application. Oops! After a reorganization of our group's
folders, LV could not find the sub-VIs on the supposed location and therefore started
to look in its search paths.
Hi Oliver,
With Autoindexing it won't work, but manually indexing with index i
mod Arraysize should do it.
Not the MOST elegant solution, but it should do the trick.
Regards
Shane.
It is possible to record a macro that corrects the alignment, and call
the code inside the labview.
-Joe
Hi Richard,
Download the utility which you find here:
http://sine.ni.com/apps/we/niepd_web_display.DISPLAY_EPD4?p_guid=B45EACE3EF4556A4E034080020E74861p_node=DZ53008p_submitted=Np_rank=p_answer=p_source=External
This library has the VI which you're mentioning with block diagram.
Hope this
Andreas,
You wrote:
...I'm very curious but can't figure out a way to see what copy of
Out Port.vi was loaded the last time my top VI was saved, since
both copies I know of, seem to generate a change (*) in my top VI.
So, I'm wondering if there is a way to look inside a VI and see the
subVI
Si vous voulez simuler un signal re=E7u =E9tant donn=E9 que vous =EAtes sou=
s
LV7 vous pouvez utiliser un VI Express.
Si vous avez la version francaise de LabView vous le trouverez dans la
palette de fonctions Vi Express - Entr=E9e - Simuler un signal. Je
n'ai pas la version anglaise mais
I have a while loop within a case statement within a while loop. When
the inner while has done what it needs to do I need it to 'break'
rather than stop. At the moment it stops and stops the whole
application, which kinda defeats the object. Is there a 'simple' way
of getting the inner loop to
hey
Are you launching LabVIEW by itself or through a VI? If its through a
VI it could be a corrupted file! If its by itself then it would help
if you gave some more info. What version of LabVIEW are you running
and what OS are you using? Did you have any problems with the
installation of LabVIEW?
Hi there.
How can I force LabVIEW to go to a specific directory on the
hard-drive? I have a DLL function which loads some .exe files into a
DSP, but if (for example) a different directory had been previously
specified by the file dialog then the DLL function fails (to locate
the .exe files). I
Understood. I have to comment that this is serious enough that it
should be made more plain and should be fixed ASAP. I reiterate that
until I found and deleted all new files (not really knowing what I was
deleting...just assumed all data files in the MAX/DATA subdirectory
were configuration
Tacking a Boolean constant (TRUE) to the case structure seems to do
the trick.
Hi,
thank you for your answer. Autoscale has always been turned off for
both scales.
The problem is not the scales being rescaled due to data, but due to
cursor movement. This does not seem to be affected by the Autoscale
properties.
Matthias
Do you have the stop condition in the inner while loop wired to the
stop in the outer while loop? If that's the case, you need two
different stop conditions so that the outer while loop continues to
run. If that's not the case, it would be nice to see an example of
your VI to determine what is
je pense que je peux maintenant r=E9aliser un des signaux en jouant sur
les delais mais je ne sais pas comment convertir la sortie du signal
du vi express signal en task id qui correspondrait a l'entree du
controle compteur
merci encore,
cordialement
didier
In its current state your vi is very difficult to read. I don't
understand why you have the sequence structure in parallel to your
main loop. This appears to be an initialization stage but could cause
problems since it is running in parallel. I think, though, that you
may have already run into
I try to use the intensity graph as an xy-input device. The user
should be allowed to drag the cursor to enter the value. However, the
user can always move the cursor outside the plot area, which causes
the corresponding axis to rescale. I want to have strictly fixed upper
and lower limits.
Your VI is far too difficult for me to read because it is not legible
at all (sorry for that). The thing is that you don't plot your graphs
for each parameter but after all testing, and that's what LabView
does.
- First of all you have to get rid of all the sequences you have
except the first one
The DAQ card I am using LabView 7.0. and DAQ hardware is PowerDAQ
PD2-MF-16-400/14H. How can I write continuous data into a file for
about 15-20 min? Welcome any suggestion.
Does LabVIEW support (display) Unicode strings. It seems to me that it
doesn't. Can we add it to the wish List.
-Sam
Due to other duties (ie day jobs), the list move has been postponed until next Monday
(4/19/2004). This has the added benefit that any problems can merely be chalked up to
the Monday Effect!
-Scott
Jeff,
Yes, it would be nice if there was some consistency to the WMP
properties and methods, but they seem to vary drastically from version
to verion. You have convinced me not to move up to WMP 9.0!
I'm sorry we could not find a cleaner solution. My guess is that
there is some prescribed
Thanks to Craig. and PJM for replying.
From 1997 post:
If you need Unicode support, please let NI know. We would also be
grateful
to hear how you think it would make your life easier (data storage,
localization, etc.). We are also grateful for any suggestions you might
have on how we should
Sam,
Here what NI said about it in 1997
" Subject: Re: Unicode support in Labview?From: Stepan Riha [EMAIL PROTECTED]Date: 16 Oct 1997 10:50:04 -0500
I'm wondering if there are any plans to support Unicode character strings in Labview? I'm working on a multilingual embedded product, and we'd
Hi,
There is actually quite a complicated issue with the abort vi call
through activex. It does work in many cases, but is failing when there
are multiple references of a vi open at the same time.
Abort VI does work via activex, just make sure you are closing
un-needed references. Try making a
Dennis,
the DLL is looking in the current directory, but
using the kernel32 function worked perfectly! :-)
thanks a lot!
We created a data analysis presentation vi and then produced a dll
from it to be called from C#.
It seems to run fine the first time, but on subsequent (interactive)
calls, the front panel does not display.
It appears that the LabVIEW run-time engine starts up on the first
call (creating app. 6
If I remember correctly that when you expand the index array and do
wire a any constants to it then it will automatically do this for you.
Check the help and see.
Joe
Hi Azad,
Here are some basic steps to get you going. Sorry I'm not going into
details...
Place the vi's that acquire the data within a while loop. Initialize
a timestamp (using a Get Date/Time vi) and wire it to the same while
loop. Place another Get Date / Time within the while loop and
Hi Les,
You are right. I do get the same message. I simply start LV and then
use the File Open and select the file to open it.
It's a bit annoying, but doesn't prevent from opening the file
somehow.. ;o)
JLV
Yeah, never mind, I got it. Thanks anyway...
Ok Erick, give me a little bit of time and I'm gonna show you what I
meant earlier by telling you to get things legible.
The problem you have with your copy is that there is only one color
because there is a single plot. I'm gonna also try to show what I
meant.
The initialisation has to be done in
I'm not sure about how your specific application is set up, but here
are some things to look at:
1) There are several VI Properties in the Window Appearance section
that you can set, such as Show front panel when called, Close
afterwards if originally closed, and Show front panel when loaded.
2)
NI's coeficients are not normalized.
I have two elements in the 1-D array and use Index Array and wire the
first index(row) and index(col) to a constant 0 and the second to a
constant 1. The first element output gives me the first element, but
the second element output returns 0 instead of the second element.
Bernd
I have a VI called Get Task List.VI and has no diagram.
This VI lists Windows' currently running tasks.
Now I have labview 7 it is not possible to convert this VI.
I need this VI. Please can anyone help me?
Hi Matthias,
You've got 2 solutions. One on the front panel, one dynamically.
On the front panel, right click on your intensity graph - Properties
- Scales - no auto scale for X, no-auto scale for Y and your
intensity graphs won't scale automatically anymore.
On the diagram, create a property node
Sam Behashtei wrote:
Thanks to Craig. and PJM for replying.
we are now in 2004 and the use of Unicode is growing. I am looking at
Unicode so that I can display and process text in other languages than
the ones mentioned above.
I remember now why I gave up; the MS controls don't let you get
Vb or .NET or any other way its going to take a lot of work and I
probably have dive deep into the subject.
For now I am going to put on the back burner,
-Sam
-Original Message-
From: Craig Graham [mailto:[EMAIL PROTECTED]
Sent: Wednesday, April 14, 2004 12:01 PM
To: Sam Behashtei
Hi,
I have a LV7 built application that works well on many computers here but, of course, doesn't on the customer's computer.
As far as I can tell, the queue (LV6 VIs) of the UI state machine doesn't work as none of the events queued are triggered while event structure works when event is
After making some changes to my application, my custom Run-Time Menu
for some VI have been replaced with the Default Run-Time Menu. I
still have the *.rtm files.
Hello,
we have trouble to build an application (make a exe file) from a
LabView Programm.
The error message is as follows:
Error 1 Occurred at PIN Calibration.vi:\.
LabVIEW: An input parameter is invalid
NI-488: Command requires GPIB controller to be in charge
Any ideas how to solve the
You may want to post to the daq forum and include information about
your hardware. Are you using any hardware? Do you have drivers?
The speed of dc motors depends on the voltage applied to them but the
problem is that motors can require lots of current. If you are just
using a daq card to
The path the custom menu is saved in the VI relative to itself. If you
move the VI, saving to an .llb or building an executable moves it
since the path changes, the VI can no longer find its menu.
You can dynamically build a path the menu by getting the current VI=92s
path and checking to see if
I wish to set up an event handler for a msgqueue like in the following
c# code: any ideas?
private const string PROVIDERQUEUE= @Archimedes\SMTLabelQueue;
/// summary
/// The main entry point for the application.
/// /summary
I have a wave form graph. High sample rate data (5Khz) is displayed
on the graph and the x scale has the appropriate multiplier to show in
seconds.
I use the property node to move the cursor and another property node
to read the cursor position. The specification for the move does not
agree
Stephane,
You can use the motion assistant to visually determine the response of
the parameters that are entered. At this time the exact formula is
not available.
Austin Talley
Applications Engineering
National Instruments
Dennis,
Your listbox2 does what I need. Using this I can put the Active X
stuff inside the while loop and only have the while loop execute if
there is a change in the list box.
Thanks for your help,
Lou
During a continuous aquisition (60 channels; 200 Scans/s)I used AI
Read.vi to read 100 scans at a time, then the sampled data was
processed and written to a file as a 2D array of single precision
numbers to a file using Write File+ [SGL].vi. When the data was read
back, I found with each call to
One more piece of information about this error:
The error happens to us when a few radio buttons are pushed and the
program is getting around to handling them as an event, and then the
front panel window is scrolled via mouse or scroll bar.
Kathy
At 3:21 PM -0500 4/14/04, Swinarsky, DJ Derrick (5453) @ IS wrote:
Problem is that I work for a big defense contractor that is not too keen
about the idea of opensource. Have some paranoid individuals somewhere in
the chain that think code developed on sourceforge is not reliable and
shouldn't be
Swinarsky, DJ Derrick (5453) @ IS wrote:
Just curious if anyone has any tips on convincing the corporate types
that using software developed by the opensource community is a GOOD
thing. I would love to be allowed to use all the OpenG tools and
think that many in my group would also benefit
I understand the usual causes of -10005, but this time things are
different. I can read the channel with AI SingleScan or with AI Read,
but the same scxi string errors out on SCXI Strain Null.
The only thing that might be unusual is the remote computer is a
PXI-8146.
Also I have not setup any
I'm not really an expert to answer this question but I don't need to be, there are
hundreds of others that have gone down your path
before. Here is a link to dozens of documents that show the US government and other
governments around the world are embracing the
Open Source movement. Since the
wetdog wrote:
During a continuous aquisition (60 channels; 200 Scans/s)I used AI
Read.vi to read 100 scans at a time, then the sampled data was
processed and written to a file as a 2D array of single precision
numbers to a file using Write File+ [SGL].vi. When the data was read
back, I found
Les Hammer wrote:
I see the problem too - running LabVIEW 7 on Windows XP, while
starting by clicking on the vi icon. It normally only happens when
the computer is very busy. That is, just after a reboot when all the
services are being started. It's acting as if LV is expecting a
response
I have a series of values one at a time and would like to calculate
the average, SD and CV of these values. I use the Statistics Express
VI, but I'm not able to configure it so that previous data is
included in the calculation and the calculation is updated after every
incoming data point.
I have a PCI-6601 and a CB-68LP connector board. I want to control
(turn on/off and change turn directions of) two 110V induction motors
through labview using a solid state relay. Is this possible using the
PCI-6601 card?
If so, could you give me some hint as to how I can start?
I am running LabView 7 and for some reason when I click the run button
it automatically goes into step mode... Or what looks like step mode.
I tried cutting and pasting the code into a completely new VI and it
still won't run continuously. Any help would be so very
appreciated.
in 2-order wavelet,the shift is decided by what?thanks.
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