Greetings!
You might want to do a search on SMITH CHART. There are quite a
few VIs related to this, although probably none specific to cat-x. As
with any transmission line, Cat-X only has a few parameters to be
concerned about: loss/frequency (expressed in attenuation per
Zvezdana,
That's great. This is exactly what I was looking to do. I have to
say though, that I think the usage of the "Array element" property
node of an array should respond to a highlighted cell, not the last
clicked cell. This would make the need for system DLL calls
unneccessary.
Still, it
Not absolutely crazy, I think.
I vaguely remember having had this problem once, and maybe not with
LabVIEW. However, I think the older installer receives the free disk
size modulo 2GB (I32)or 4GB (U32) so you may have to create a file
large enough just to get under 32GB or 30GB free space boundary
Hello
I need to print the Picture control (B&W) in the high resolution (300
dpi). I need to create a picture so it fits 300 dpi without any
resizing. I calculated it like follows. My picture shell have 10
inches x 7 inches. With a 300 dpi it gives dimensions: 3000x2100
pixels.
The problem is that w
Greetings:
CAn your sensor be configured to only send packets upon request?
If you're using an internal clock on in your sensor, you're sort of at
the mercy of the accuracy of that, and you will undoubtedly have some
drift over time. A little more information on your sensor wo
Thanks anyway but I fixed it by wiring 127.0.0.1 to machine name and
giving myself access to vi server :)
Hi,
If you have labview package, you can find lot of examples there.
Start Labview -> Help Menu -> Find Examples-> Hardware input and
output -> DAQ -> Here you either you can go to analog input -> then
general -> search vi as per your requirement.
Or you can use timer/counter/digital input & out
Hi,
in pci-6013 card, DIO state is pulled down by putting a resistor of
1.5 Kohm between DIO & DGND. If you connect 1.5K resistor between Vcc
& DIO, you will get 2.5V approx.
Further to increase voltage at this DIO, you have to reduce the value
of this resistor. Lets say, if you connect a resisto
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hello
You need to use a property node to open tree.
See enlosed picture.
hope it helps
Pawel
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Daniel,
you asked on Sun, 1 Feb 2004 20:31:07 -0300
> I need to switch diferents screens in my aplication and I need to set
> position and size in controls and indicators, like this, diferents screens
> will be the same reference position. I had used propertie node to set then
> but, when I add to
Hello Joe,
I am pretty new to serial comm, but I have enough knowledge to know that
not all protocols can handle more than one comm pair (master-slave,
master-master...) on a port. If there are more than two entities sending
data on the same line then you need a way for them to tell each other
ap
Hi,
I am having a .gif file which consists of vi code. I want to convert
that .gif file into vi & complile it. I am using LV 6.1 & 7 express.
Is is possible?
Reverse is surely possible like we can convert the vi diagram into
gif/.bmp file? But above i dont know?
Your help will really appreciated.
Hi,
I want to convert a number of llb:s into dir:s, while keeping the
llb:s parallel to the dir:s. The reason for this is that files in
dir:s would be easier to handl in our version control software
(Rational ClearCase), but we want to keep the llb:s in order to keep
track of our version history.
chulta, thanks for the offer to expand my question. The suggestion
and information you have provided are accurate and helpful.
I'm trying to test my UUT which is connected to the stimulus via
varying feet (varying lengths of CAT-x cable)of cable. The source may
be a signal generator or a PC.
My
Another way to do this is to get a reference for the control, then use
an invoke node to "get image". This output then can go into the
flatten pixmap function under the graphics format palette. At this
point you can use the other functions in the palette to save as a bmp
or jpeg, etc. This will b
Hi Alexander,
Well now that you have seen all of the normal answers to this Q, let
me bring up another.
Warning! This is not for the faint of heart!
Please see this thread for an exchange Jean-Pierre (I would have given
him 5 stars if this was an answer) and I had about two years ago.
http://ex
Hallo Greg! / Hallo everybody!
I called NI in Germany and they told me, that my problem is known but not
solved ...
While searching through different directories I found two different places
with the needed mesa library. To run the application I had to copy / link
the files /usr/local/lib/Labvie
Quote: "Not easy to explain to a customer...Good luck!"
No kidding... It's faster to come up with crazy solutions than to
explain something like that...
;o)
>>Well you usually have one caller and many subpanels. Implementing it
once in the caller instead of 50 times in each subpanel seems like a lot
of time saving to me. It also seems more logical to me to do it in the
caller but that may be just my warped mind.
Rolf,
I'm surprised by your comment.
Chenchen
It's not quite clear to my why you think the data are too complicated
for a queue. You can easily send the data to the queue as an array
and read the appropriate array elements for further processing since
the data that you are sending is just data retrieved from a data
acquisition. The
Hello Amrish,
If you go to ni.com and search on "Using Quadrature Encoders with E
Series DAQ Boards" you'll find an entry of the same name. This paper
explains all about using quadrature encoders with E Series boards.
The typical problem is that the counter on this board was never
designed for qu
>From the Allen-Bradley website for Ultraware
(http://www.ab.com/motion/software/ultraware.html) it looks like the
software comes with C functions in a DLL. You can call these C
functions from LabVIEW using the Call Library Node. Take a look at
chapter 2 in the Using External Code in LabVIEW manu
Many thanks for such excellent pointers to specific help features (and
the caution on trying to overachieve a fairly simple task !).
You're correct in the one-point-at-a-time data acquisition. I've been
lazy in simply taking one part of the prewritten driver and using that
for reading the data co
I have several thousand data files, each of which contains around
14-16 lines of information such as sampling frequency/channel
information at the top, followed by the data in CSV format and ending
off with another couple of lines of information. How would I go about
filtering out the unwanted info
Hello Ben. Thank u for your help. U know, i've actually seen the
thread you are mentioning about. I've came to it surfing NI site,
looking for the answer. Of course one can not deny the universality of
this approach. More over, those virtual controls look like real. And i
think that, calclulating p
Hello Ben. Thank u for your help. U know, i've actually seen the
thread you are mentioning. I've came to it surfing NI site, looking
for the answer. Of course one can not deny the universality of this
approach. More over, those virtual controls look like real. And i
think that, calclulating positio
Hi,
I try to build an executable from a vi which is working fine in the
6.1 development environment. The problem is with the local decimal
point settings. In the development environment I switched off the "use
local decimal point" option. Unfortunately if I build an executable
with AppBuilder loca
Hi alfa,
I try to answer your question in English as far as I got a clue of
your problem.
If you want to change the settings of the scale of a graph manually
just right-click on the graph in the front-panel and then click on
"x-axis", "format" and there you can change e.g. SI-Units and the
number
If the headers are fixed # of lines, just use "Read Lines From
Files.vi" to read in that many lines, then you will get an offset,
start retrieving the data at the offset to the end.
If there is a distinguishable phrase or character before / after the
csv data, then read in several lines at a time
Try Image Toolbox at:
http://www.geocities.com/gzou999/index.html
You can read/write bmp, jpg, gif, png, tiff, ico, wmf, & emf files
programmatically, and display the image in LabVIEW picture control.
If you want diaplay an image on front panel in edit mode, simply drag
& drop the image file
Thanks for the quick reply. I'd have to use the second option, as the
number of lines isn't fixed but there are distinguishable characters
before and after the file. I'm a complete beginner at this, so you'll
have to excuse my ignorance, but if you could give me a bit of
guidance as to how to searc
Hi Alexander,
If you want virtual controls NOW you will have to go with one of the
methods mentioned above.
I believe NI is working toward giving native virtual controls. The
method mentioned by BJD is an example of this fuctionality.
If you look at the releases of LV since 6.0 you can see the c
Hi,
In LabVIEW 7.0, you can easily add a scrollbar by right-clicking on
the control >> Visible Items >> Scrollbar.
If you want the scrollbar to appear only when needed, then you can use
the draw area size property Nirmal suggested i.e if the draw area size
is less than the picture size, then make
Thanks everybody, that's it! NT returns the free space modulo 4GB,
which is an unsigned 32-bit integer. So this problem can occur anytime
there's > 4GB of free space. Nothing important about 32GB as I had
first expected. Glad to know this is not a LabVIEW installer problem.
The windows calculator
At 22:41 -0800 02/01/2004, Joe wrote:
> I'm trying to read data packets from a sensor that
> is connected through a serial port and is
> configured to transfer data every 100ms. what is
> the best way to synchronize the reading intervals?
Set up a read to timeout after 200 ms if you know your term
This is a strange problem. I think what you need to do is isolate the
node that is producing the error. The idea is to open the bad subVI
and put several error indicators on the front panel and connect them
in critical points in your code. This way you can look at the front
panel of the executab
Peter, Dan,
Thank you very much for the useful information.
Danilo Melges
-
Biomedical Eng. Student (COPPE/UFRJ/BRASIL)
--- [EMAIL PROTECTED] escreveu:
> Peter, Danilo:
>
> As you said, these VIs do expect that you have some
> pretty detailed
> knowledge of U
Jim
>As you so keenly pointed out, if I only have one caller and many>subpanels it is relatively easy to implement it once. However, we>currently have 61 User GUIS that use about 15 GUIS repeatedly. I don't>want clutter up my GUIS with subpanel stuff. That can be handled by>another object very cl
That is a clever bit of LabVIEW coding. Thank you DFGray for posting
the presentation and the VIs. I learned something.
Hello,
You can enable or disable termination characters by using the Config
Serial Port VI in your flow of programming. See the LabVIEW <->
Serial.vi example that ships with LabVIEW (go Help -> Find
Examples...)for proper use of this VI.
Note that the termination character specified in the confi
Dear Friend,
I'm using VISA for communication with parallel port. I used the NI example for this. but when I run this VI It returns an error message " Error-1073807298 occurred at VISA Write in Parallel Exp.vi"
The lines 11 and 12 have been grounded.
What shoul I do?regards,
Hamid
Hamid Shojaei,
U
I am primarily interested in the chunking algorithms to optimize
display speed. So the two subVIs dealing with decimation are of great
interest to me as I have traditionally relied on the decimation
LabVIEW automatically performs rather than the programmatic min-max
decimation to deal with display
You need to decide whether you want things controlled by events, or by
loop polling.
Some things to consider:
Inside each event you have a loop where you read the booleans the
events react to. That means the events will be fired over and over
again inside the loop, and you'll have a stack of old
I have tried about a million times now to properly create a scale in
MAX 3.0.2
Essentially, all I want to be able to do - fairly simple you would
think - is apply a linear multiplication to an input channel of an AC
signal voltage. Without any scaling, I am seeing my input signal as a
+/- 8 VAC s
Hello,
It seems that you are trying to test LabVIEW to VISA support by
connecting 2 USB ports on your computer to a USB Hub, sending data out
one USB port and receiving it on the other.
This is not a supported configuration with NI-VISA, the underlying
communications protocol that will support US
Thanks, worked a treat!
I have a 3-D graph with tha appropiate data...
the next part of my assignment is to be able to have the user specify
the labels for the X, Y, Z axis, increment, and starting and ending
value for each axis. I know this could be done under the properties of
the 3-D graph, but I need to do it programa
VISA Bytes at Serial Port tells you how many. It's on the Instrument
I/O>Serial palette.
Hi!
Thanks a lot! I am new to the event structure and confused because of
that. Thanks for ur help!
Hema
Hi,
It may be that the linker is looking definitions(libraries) of the
functions you are using. Make sure the linker can resolve the paths to
any "external" functions, for example, C math routine functions.
'Ope this helps,
-ken-
Apparently I need a conversion kit to use old VIs in Labview 7, and I
even have the part number, 776874-03, but how do I get it?
i would like to know what the locations of the peak detector refer to?
what does the value of the location of the peak detector tell? does it
tell the location of the peak and if so, what unit is it in? also, if
i set a threshold value, does it mean that only one peak would be
detected or any value
I think you just call your NI rep.
"ANNMCNEAL" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Apparently I need a conversion kit to use old VIs in Labview 7, and I
> even have the part number, 776874-03, but how do I get it?
Greetings!
The peak value VI gives you four outputs, actually: positive and
negative peak values and the positive and negative peak "horizontal"
locations. The locations are in data points, not actual time. To get
the time, you have to calculate it from your sample rate.
> The thing is, that I want to realise a function with a back-loop
> within a subVI while the back-loop is positioned outside of the subVI.
> This is to e.g. read a bundled output of the subVI in the mainVI,
> unbundel it it in the mainVI, choose one of the list-items in the
> mainVI, give this as
Good evening!
There area a couple of approaches to this. If all you need is
for the axes to reflect the data, you can enable the autoscaling, with
either a loose fit or tight fit. (All the graph vi's have autoscaling
available). If you need to change the label text, you can
Thanx for your help, Luca.
As we know similar is possible for C code, for example i have sample
code put on the some web page, i can copy it in notepad file & save it
as .c file & compile it directly.
I feel if this feature is possible in LV, it will really give a great
help for direct conversion
Hi Walderr:
You might want to consider that the header information might be
useful, as well. Using the same technique as above, you can "pipe"
the header lines to actual header locations in your data file.
(Usually they don't represent a large use of memory, so it might be
nic
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