Matt-
Since this issue is now a signal coding problem with LabVIEW, I
recommend that you submit a new post to the discussion forum under a
different title.
This way, future users will be able to search for problem answers for
LabVIEW signal graphing proramming, and your entry (with answer) will
b
Matt,
Right-Click on the Convert to Dynamic Data Type icon and choose
[Properties], then select "single scalar." This should fix your
problem.
Good Luck!
-Joe Des Rosier-
National Instruments
Matt-
By all means! As a matter of fact, the "find instantaneous maximum"
code that I wrote for you may be added to our list of internal example
programs for others to reference in the future.
Best Regards,
-Joe Des Rosier-
National Instruments
Matt-
Thanks for getting back with me. I hope your vacation was relaxing.
Things have been a bit hectic in the office this past week, but I did
look further into your questions and have come up with the following:
First, I understand you wish to change the order in which the data is
plotted on th
Brett,
If your apparatus is already preloaded and you want to use the
preloaded value as the initial condition reference point, you will
want to use either hardware or software offset nulling.
Offset nulling is a method used to offset a series of measurements
with respect to an initial condition
Hello,
Your Discussion Forum post was a link to a previous post that appears
to have been answered by users. Do you have a particular question? If
so, please repost your question and I will do my best to help you
reach a solution.
Best Regards,
Joe Des Rosier
National Instruments
Germ,
Here is the http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RNAME=ViewQuestion&HOID=50650008001C3D&ECategory=LabVIEW.LabVIEW+General";>
link to the thread that I feel will help you resolve your
problem. I'm sorry the search did not work when attempted.
I hope this wor
Hello Brett,
I understand you're looking to programmatically blink a button between
the 'on' and 'off' states. This is a typical request of LabVIEW users,
and I have included several answers to this question in the links
below.
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RNAME=ViewQ
Hello,
In order to log the measurements every hour, you will want to
implement a "Wait (ms)" function. This function can be added to the
block diagram by [right-clicking] and selecting the following:
[All Functions] >> [Time & Dialog] >> [Wait (ms)]
You will want to place this wait function insi
Hello,
There is no way to "revive" your program in XP. Unfortunately, LV 2.x
cannot run on XP.
What we will need to do is migrate the program using the LabVIEW
conversion kit. More information about the conversion kit can be found
http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc
Hello,
In order to display Arabic text in LabVIEW, follow the directions on
the following post:
http://digital.ni.com/public.nsf/websearch/A85102C718443B3D86256B13007E559F?OpenDocument";>
Click Here
I hope this helps. Please let me know if I can further assist you.
Best Regards,
Joe Des Rosi
Good deal. I'm glad that you're up and running now.
Best Regards,
-Joe Des Rosier-
Jeff,
Keep in mind that the first element in the array is indexed as
'element 0.' That's the standard LabVIEW array formatting, so be
careful with your array syntax. If you had the following array: [a b c
d], letter 'b' is element 1.
I hope this helps.
Kind Regards,
Joe Des Rosier
National Inst
Chris,
A good resource for instrument drivers is the NI website at this URL:
http://www.ni.com/devzone/idnet/
If you cannot find an instrument driver for your device on this site,
you should submit a request for the driver by clicking the [request
driver] link. Also, if the device has a RS-232 po
Hello,
Using LabVIEW, the only option I can see you pursuing is to use a
timestamp to take the current time (first time the program is run),
write this value to a registry key, read the registry key during each
subsequent program compilation, take the difference between the
current time and the st
Hello,
Thanks for contacting National Instruments.
I found some information that I feel will help you to calculate the
sampling rate, so that you'll be able to use this constant in your VI.
Please see the link below.
http://digital.ni.com/public.nsf/websearch/5782F1B396474BAF86256A1D00572D6E?Ope
Hello Ryan,
Thank you for contacting National Instruments.
I am sorry, but you will need to contact the vendor of the DrawWidget
Control 2.0 component in order to obtain a current copy of the
software.
Kind Regards,
Joe Des Rosier
Applications Engineering
Hello,
The previously posted solutions are definitely valid. If you'd like
some example files to work with, you can (from the front panel of your
application) click [Help]>>[Find Examples] and search for "I/O" and
"strings."
Good luck!
Joe Des Rosier
National Instruments
Neal,
I'm sorry for the misunderstanding. If you need to use executables,
then queues are not the solution. Your best bet is to stick with data
sockets.
According to the newest post, memory mapped files are a possibility,
but I don't have any experience with this technique.
I'm sorry that queues
Hello,
I am sorry that the previous solution didn't fix the problem. I found
another knowledge base entry that may be the correct solution. Please
follow the instructions on the following link:
http://digital.ni.com/public.nsf/websearch/51A4147B66E59BA286256C690077109B?OpenDocument
I honestly fe
Skegsy,
Hello again. I'm a bit confused as to what you mean by "my load
indicator doesn't truly clear itself."
I noticed that you use a case structure that is designed to clear the
peak-load indicator. Once you press the 'clear peak load' button on
the front panel, your indicator will temporarily
Dear Neal-
I think that you can implement queues to communicate between LabVIEW
app's on the same computer. Queues are one of the newer LabVIEW
features, and I feel that they will be much easier to use than a Data
Socket.
LabVIEW includes several excellent queue operation examples, which can
be a
Dear Kirk-
What are your machine specs? I'm thinking that this problem may be
fixed by increasing your system RAM, processor speed, and/or video
card. One of these system parameters could undoubtedly be
bottlenecking your refresh processes if any of your hardware
components are outdated.
Another
Hello,
It sounds like you've sorted out your questions through the two
excellent response posts.
I found a couple of knowledge base entries regarding FFT analysis in
LabVIEW, and I thought you may want to reference them for further
information/instruction. Please look at the following links.
htt
Hello,
Do you already have the LabVIEW PID Control Toolkit? If not, please
visit the following link for more information about this excellent
package: http://sine.ni.com/apps/we/nioc.vp?cid=1394&lang=US
Also, I found some more information regarding the use of transfer
functions. Please see the fo
Dear Badhri,
I came across your support request and realized that I've seen a
similar circumstance occur in the past. A customer was having problems
building a MatLAB simulink DLL using a LabVIEW toolkit.
http://ae.natinst.com/operations/ae/public.nsf/fca7838c4500dc10862567a100753500/0e0740a80c80
Sam,
Unfortunately, this is not a LabVIEW error. You have a memory conflict
within Windows. The previous response to your thread is an excellent
evaluation of the problem. Because the error is a Windows
registry-level error, I cannot provide support for this issue. You may
want to contact Microsof
Hello,
What you will want to do is the following:
1) First, place a waveform chart on the front panel by right-clicking
on the panel and selecting a Waveform Graph under the [Graph Inds]
panel
2) Press [Ctrl]+[E] to go to the block diagram
3) [Right-click] on the diagram and choose [Signal Mani
Dear Spearing,
First and foremost, thank you for contacting National Instruments.
When you say that you want the user to be "isolated" from the shell
VI, do you mean that you wish to set some security options that
literally 'lock' the user out of the shell front panel and block
diagram? If this i
Hello,
The two previous posts are excellent solutions for your desired
action.
One thing to note, however, is that the use of local or global
variables can cause performance issues on a large scale. Every
instance of one of these variables will create a copy of the data in
memory. If you are tryi
Hello,
Thanks for contacting National Instruments.
The easiest way to control any form of FTP interaction through LabVIEW
is to use the FTP VIs within the connectivity toolkit (provided you
have this toolkit). If you do not have this toolkit, I highly
recommend that you visit the following link f
Hello,
Are you actually trying to install DAQ, or are you trying to install
LabVIEW? What software version(s) are you currently using?
If you're trying to install DAQ, I have a suggestion. Please go to
www.ni.com and click [Drivers and Updates] on the left. Click [All
software versions}, then scr
Dear Skegsy-
You will not be able to use the "customize control" function to modify
the indicator's disabled state. Because you're, in effect, changing
the image display of a Boolean indicator, there is no 'disabled' state
for the indicator. A 'true' or 'false' value is always being passed to
the
Germ-
I understand you're experiencing issues when taking continuous,
consequtive readings with your Keithley DMM.
While searching through the archive of similar customer experiences, I
came across a thread that may help you reach a solution.
Please do the following:
1) Goto www.ni.com
2) Scroll
Dear Bichillo,
I was searching through our knowledge base archive, and I may have
found some more information to help you learn about the differences
between VIs and VITs.
Please do the following:
1) Goto www.ni.com
2) Scroll down and click [KnowledgeBase]
3) Perform a search on "+vi +vit +diffe
Hello,
Thank you for contacting National Instruments.
It is my understanding that you are trying to find a VI that mimics a
thermometer within LabVIEW 7.0.
Fortunately, LabVIEW 7.0 has a library of built-in example VIs,
several of which deal with temperature analysis. First, open LabVIEW
7.0 and
Hello,
Thank you for contacting National Instruments.
I may have found a knowledge base entry that accurately addresses your
problem. Following these instructions will, hopefully, resolve your
Dll problem.
To access the knowledge base entry, please do the following:
1) Go to http://www.ni.com
2
Hello,
Thank you for contacting National Instruments.
I understand that you're experiencing issues when trying to build a
LabVIEW dll.
Fortunately, there is more information regarding this problem within
our online knowledge base. See the following link.
http://digital.ni.com/public.nsf/websear
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