Giulia,
what Russell means when saying that you should acquire your trigger as
an analog channel is that this way, you would be able to perform post
processing of your acquired data. That is, acquiring your signal and
your trigger together, allows you to graphically or digitally see when
the
[EMAIL PROTECTED] wrote:
When I created a VI recently, I noticed that a control's label in the
context help did not match the control's label. I had copied the control
from another VI and didn't realize that it had a caption set different than
the label (only the label was visible). When I
Bonjour,
J'ai l'habitude d'ins=E9rer des VI dans d'autres VI.
Ma mani=E8re de proc=E9der est la suivante :
je cr=E9e un vi (deviendra sous-vi, je le visualise au niveau des
connecteurs).
Je le ferme (je l'enregistre).
J'ouvre un autre vi.
L=E0 je vais dans fichier/ouvrir
je clique sur mon sous-vi
at run time i am entering data in table,
i want to clear the entire table on button click.In the same run.
Help me please.
In short, because the table is a control, you'll need to use a local
and write an empty string array to it.
The button should be latched (right click on it on the front panel and
select mechanical action-latched until released) and wired to a case.
Right click on the table on the diagramme and
top_general wrote:
I want to configure my usb controller with this example in windows
2000. I use my pc computer's usb in equiment's managers. I have four
usb controllers(ONE:intel(R)82802BA/BAM USB Universal Host
Controller-2442. TWO:Intel(R)82802BA/BAM USB Universal Host
Controller-2444.
VanessaB wrote:
Hello,
I'm a beginner in Labview and I'm trying to build a VI that displays
an image snapped with a camera connected to an IEEE 1394 board. The
problem is that the type of the image out output of IMAQ IEEE 1394
functions is not the same as the one of the other imaq
christophe wrote:
Je le ferme (je l'enregistre).
J'ouvre un autre vi.
Là je vais dans fichier/ouvrir
je clique sur mon sous-vi et j'essaie de la faire glisser sur le
diagramme de mon nouveau vi mais çà ne fonctionne plus.
Auriez vous une réponse ou une autre manière d'appeler un sous-vi
Bonjour Christophe,
Comme Rolf l'a mentionn=E9, tu peux facilement ins=E9rer un sous-vi en
utilisant la fonction select a vi ... situ=E9e dans la palette de
fonction lorsque tu cliques avec le bouton de droite dans le diagram.
Martin
i am currently plotting data on a graph from a physical system.
However when i want to add new data to the plot, the old one is
replaced. I am trying to do more than one plot on the same graph,
where the incoming data is at different times. I want something like
Excel where i can just add a
Hello,
I'm a beginner in Labview and I'm trying to build a VI that displays
an image snapped with a camera connected to an IEEE 1394 board. The
problem is that the type of the image out output of IMAQ IEEE 1394
functions is not the same as the one of the other imaq functions and
the image display
Hi Dennis!
Sorry to disturb you again :(
It seems that your soulution doesnt work when you add an envent
structure to the while-loop.
Do you have an idea why this is not working?
Hi Chris,
I think setting to the default values is not possible in case the VI is
running. The VI server allows to set the default values for all controls
and indicators globally of a VI in memory but to my knowledge it is not
possible to set defaults for a single selected control of indicator.
In my vi,on button click i am adding new entries in table,now i want
1. when i press a button to write data in table, same time my data
(set of data(i have 7 columns))must append to excel sheet
help me to slove my problem
Hi mads
thanks for ans.
my problem is solve now
Tink wrote:
I'm having the same issue with my vi's. I'm running about 15 vi's on
win2000 server. I have had no problems the last 6 months. My vi's
usually run for a week before I restart them, but recently I have been
gettin drwatson errors. Any help would be appreciated.
What version of
Minty wrote:
How/where would a newbie like me even start to create an application in
LabView to display and capture live video from a capture card and camera,
without the use of the use of IMAQ VIs, drivers or NI hardware?
I would think you should in that case check out two good sites:
Irene
Craig,
You wrote:
...It's caught me out before that (using the default positioning) if you
display both, then the label appears in its normal place and the caption to
the left, but if you display only the caption then it moves to the place
vacated by the label.
I find that it is the the label
Hello,
Could you give me more details about your GPIB setup? How many
instruments do you have on the bus? It sounds like the 4083 is
breaking the GPIB bus where no other instruments can communicate on
the bus when you have the 4083 connected, is this what you're seeing?
What do you mean that
Thanks so much for your help, that is just what I wanted my vi to do!
I am lurking the discussion forum so my posting here is independent of
whether you are on trial or not. In response to your email that you
sent NI support, I activated your trial support period. This gives
you 1 on 1 access to NI support engineers via email (like myself) or
phone. The support I
No you're not crazy--that is a new feature. I'm not sure what triggers it
as I have only caught it doing it once, and tracking it down has been a
infinitesimally low priority...
Michael Porter
Porter Consulting, LLC.
... after all He's not a tame lion...
Thank you, Jeremy, for your reply. When I set the threshold terminal
to 0.0015 and the width to 3, I get 4 peaks and when I set the
threshold to 0.4 I get 11 peaks.
I noticed that Peak Detector.vi uses lvanlys.dll. Is it possible for
you to send me your lvanlys.dll file?
If this doesn't
Sometimes I open a VI, and upon opening (i.e., before I do anything),
it says the VI has changed.
If I use File/Revert, it still opens up that way.
In such cases, LabVIEW also asks if I want to save changes when I
close it.
When I look at the changes using File/VI Properties... under Category:
Thanks very much for the reply, Liz.
I can't seem to duplicate your diagram, as the only related ActiveX
object I can generate is WMPLib.IWMPPlayer4, instead of what you
have, WMP.
The actions I'm taking:
* create an ActiveX container in my Panel
* choose Insert an ActiveX Object from it's
I am using PCI 6034E board and SCXI 1100 module to do a multiple
channel data acquisition. I have 5 channels so I set the scan rate at
1000scan/sec, and acquire 20 sample/channel in AI mult PT. So I guess
that the computer will take 20 samples at each channel for all 5
channels. However, what is
I have used a low cost motor controller-driver successfully with LabVIEW.
The controller-drivers were AMS models DCB-264 - (up to 4 amps) and
DCB-261 - (up to 1 amp), (www.stepcontrol.com). Also, see
http://www.stepcontrol.com/ams_product.html#Driver-Controller%20Boards for
more info. You can
I don't have any experience with those drives but Compumotor
(compumotor.com) makes drives that will work with labview and they
have some ready made vi's to use. There are three flavors, one is a
drive only and the other two are controller drives (programmable).
There is a ascii version that does
You may want to use the config file VIs to read and write your values out
to a file that can be saved along side your .vi or .exe. That's the usual
recommended solution for programmatic setting of a default value.
Pojundery,
Stephen R. Mercer
-= LabVIEW RD =-
Error 1074135023 at IviRFSigGen Initialize With Options.vi, Primary
Error (Hex 0xBFFA0011) Function or method not supported. Error
occurs when using Agilent IVI driver for RF Signal Generator (E4437B)
with LabView. Instrument also does not switch to remote mode in
response to the IVI initialize
For years, I fought with LabVIEW, trying to keep things looking decent
in both Windows LARGE and SMALL font sizes.
By this, I mean bSettings - Control Panels - Display - Settings -
Advanced - General - Font Size/b
I love to use large fonts - I run my display at 1600x1200 and it just
looks
Nice answer. Once again, hadn't thought of this.
4 Stars.
Shane.
After converting boolean true/false to (0,1) I'd like to count the
number of ones during data acquisition or if better the number of
trues before the conversion. Everything I tried accepted a different
type of data (string or waveform instead of word)
Thank you very much for your effort in writing the code in LV6.1. I
tested it on my computer and it seems to work fine. Thanks again and
Happy Easter,
Jerome.
I actually wanted rate Jeremy's later replies in the discussion. But
I didn't how to do that.
His comments were very helpful.
Hello,
You might take a look at the following tutorial for more information
about calling a VI by reference. It's got some great visuals and
examples.
a
href=http://zone.ni.com/devzone/conceptd.nsf/webmain/04F9CCB32C67F24386256802007B878F?opendocument;Tutorial:
Calling a VI by Reference/a
You
Have you checked out the a
href=http://zone.ni.com/devzone/conceptd.nsf/appnotebynumber/6F25CBA2CD73417786256869005E5FC3?OpenDocumentnode=dz52000_us;Application
Note/a on encoders?
There are some good Knowledgebase articles too. The code will depend
on which DAQ board you have and what type of
Thank you Enrique, that works good. Just that I need to know the count
with every consecutive, incoming value, not after the loop is
finished. So a count in real time.
Bernd
Nirmal,
I have not tried to set up a duplicate system, but I did have an idea
for you. Are you using a SH68-68-D1 cable (it's black)?
The SH68-68-D1 is the only cable you should use with your 6534, or any
high-speed digital DAQ device for that matter. The D1 cable is
optimized for digital and
Splendid ;-)
Thanks again!
I get a -10005 device is invalid error when I try to run SCXI Strain
Null.vi on a SCXI-1520 which is connected to a PXI-6070E. The PXI is
being accessed via RDA/ethernet from a LV7 Windows computer.
Otherwise the SCXI-1520 can be configured and read without difficulty.
It seems to me that the example at
examples\comm\ExcelExamples.llb\Write Table To XL.vi
should give you a very good idea how to go about this.
Rolf K
Try putting the code for updating the cursor info inside the timeout
event with a small timout value and see if that fixes your problem.
The first place you should look is at the shipping example called
Write Table to XL (HelpFind Examples). It uses ActiveX. It won't do
everything you need because it creates a new sheet for writing but it
wouldn't take much to modify it to keep track of the last row written
in a shift register for
How about feed the boolean to a case loop selector and set a counter
in the loop?
Looks like the behavior you're seeing is reproducible on 1-D arrays.
The description in LV Help is correct for n-dimensional arrays, for
n1 (try a 2-D array as a test).
ihow am i wasting 2 bits. /i
By using only one fourth of the input range, you are in effect
throwing away two bits (2^2 = 4)
isince the full scale voltage reading is 0 to 5 volts then should it
not be 5/2048 resolution./i
But you said the resolution of the CARD was +/- 10 Volts. The card
doesn't
thanks a lot i have few more questions, how am i wasting 2 bits.
secondly i was thinking since the full scale voltage reading is 0 to 5
volts then should it not be 5/2048 resolution.
although i may be wasting 1/4 of the scale but is it having an effect
on the calculation as the calculations look
Thank you very much. I am glad to help.
Well that is exactely what I'm trying to avoid, an additional file!
So unless someone has a better idea I'll encode my single default value as a
VI name inside my llb.
Chris
From: [EMAIL PROTECTED]
Date: Fri, 09 Apr 2004 14:09:49 -0500
To: Scott Hannahs [EMAIL PROTECTED]
Cc: Christophe
In case of 2-D array you have to connect the element equal to size of
other dimension if you want to replace all the elements. For eg. if
you have a 5 row by 2 col array and you want to replace the entire 2nd
row with 0, then you have to wire 1 to the row index and the element
should be a array of
When you do a scan, it will sample Ch1, Ch2, Ch3, or in whatever order
you specify and then it repeats. This is called multiplexing.
There's a lot of tutorials and white papers on NI's web site. One of
them can be found A
Bernd R. wrote:
After converting boolean true/false to (0,1) I'd like to count the
number of ones during data acquisition or if better the number of
trues before the conversion. Everything I tried accepted a different
type of data (string or waveform instead of word)
Well, you could use the
Peter wrote:
I have looked at the ni.com site and several other labview support
forums on the web and have seen references to a similar approach but
have not been able to find any examples. When I have called the DLL
from Labview execution of the VI that calls the DLL is suspended until
Depending on how much trouble you want to go to...
You can make it a dynamically loaded VI in the built exe.
Then when you need to set its default value. Since it isn't running, then set the
value, make it a default then save the VI back into the llb. Then when you need the
value, just call
In my vi,on button click i am adding new entries in table,now i want
1. when i press a button to write data in table, same time my data
(set of data(i have 7 columns))must upend to excel sheet
help me to slove my problem
Measurement resolution is calculated from the range of the daq board
and not your measured signal. You had stated that it's range was +/-10
volts so CoastalMaineBird's 20/2048 is absolutely correct. To get more
resolution, you have to either add bits or change the range.
hey thank alot man, im gonna try to do it with the charts instead.it
doesnt matter if its graphs or charts i just want to be able to save
the data and add a new plot to it
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