Hi,
If you create virtual channels, you can use virtual channels directly
in your software program to get the engineering values for strain,
temperature etc.
If you dont make virtual channels then in your software program, u
need to perform all the setting which becomes sometime difficult. And
yo
I also just found what Michael has noted re the Application Edit menu
undo and redo items not working in a LabVIEW runtime when they are
made part of a custom menu. Selecting the menu item tag to be
APP_UNDO or APP_REDO doesn't help. It all works fine from the
development environment.
i have no. of variables,in multiple vi's and if value of any bariable
changes in any vi other vi need to do something.i know i can use
occurences but i do not know how to implent them
I believe that the Front Panel of the VI which is to be inserted into
a SubPanel Container cannot already be opened (or already inside
another SubPanel Container). To solve this problem, you can set
VI.Panel.Open = FALSE just prior to inserting the VI into the SubPanel
Container. I hope that work
Hi,
there are numerous examples which you can find at this path:
C:\Program Files\National Instruments\LabVIEW 6.1\examples\daq\counter
or Goto Find examples in Labview launching Panel -> Hardware Input and
Output -> DAQ -> Counters
If you are using DAQ card, Goto ->Count buffered edges or count
I want to measure different parameters such as Strain,Temperature & if
iam using DAQmx vi's,Do i need to create the "DAQmx Create virtual
Channel.Vi" for configuring each parameter i measure separately and
use the same number of DAmx read vi's or is there any other way?
Hi,
I think there are some misunderstanding, I think I am not clear
enough. Actually I wanted the front panel of the subvi to appear on
host side. But on the client side (through web-publishing) the front
panel of this subvi will not appear.
Thank you
Best Rdgs,
Sky
I have multiple threads - in one thread (Thread A) I want to show the
front panel of another thread (Thread B) using the SubPanel Container
- Thread B is already running prior to Thread A starting. It appears
from the examples of using the SubPanel container and my attempts that
when using the Sub
How Can I call resource manager ,and save my visa resource name sets
in my labview program?
Hi!
I am searching for an example vi of a down-counter for
ttl pulse trains.
thnx,
Holger
Hello,
First it is necessary to have both devices properly configured in MAX
or T&M. Remember that the User Manual of your VME device will let you
know what are the allowed Base Addresses that you can use, and then
you need to enter those numbers in MAX.
Some VME devices will require for you to s
I try to initiate a single sweep command using the following code
"INIT:CONT OFF". The R&S FSP7 does not seem to except or recognize
this command. Can you help as to why this is the case. I want to use
single sweep mode and average my signal with the average count of 10.
Manual it is fine but thru
The User Manual of your VME device will tell you what are the valid
parameters for your device. The configuration in T&M Explorer or in
Measurement & Automation Explorer (MAX) is completely manual.
You need to tell T&M or MAX all the information of your board, as
explained in exercise 2 in the PDF
You might try moving the "Saving Data" led off the graph. I know in
Windows that when you have controls overlapping it can slow things
down quite a bit. I also have found WinXP to be slower than older
Windows versions, especially if you don't have at least 500 MB of
memory.
Hello,
I would like to Programmatically change the display of the
windows title bar of my application so that it reads the name of the
file I currently have open inside of it. I can not find any
documentation for dynamic changes, only static ones using the VI
properties wi
You will need to use the Worksheet.Copy Invoke node and wire the
Before or After input with a reference to a worksheet in another
workbook.
If you are already accessing both workbooks, just create a reference
to a sheet in the target workbook using the Workbook->Sheets Property
and Sheets->Item In
If you do not have VI profiler, edit your code to use the tick count.
This way you can have the program itself tell you the timing
statistics.
I could not see anything that would explain why the code is slower on
the Mac. This is not to say that there is no problem--I just could
not see it. Does the Mac have a lot of memory? I recommend running
the VI profiler (if you have pro) to see what is taking so much time.
You should also disabl
Thanks!
I didnt realize that it is possible to have more than one cursor!
This means I need to generate as many cursors as points in my array
and just make it look like an ordinary point.
Then I can use this cursor to move the point to any position within
the graph.
I hope my guess is correct!
Th
Yes, this should work.
p.s. If you want to give someone the best rating, it's four stars. One
star is a lousy rating.
The problem is that this module doesn't have open thermocouple
detection. That's why I asked the question to begin with. But when I
read your comment about the resistance measurement I was curious to
the details of how exactly to do this.
right!
really nice - I hate it !
thanks
As Matt stated, that particular module has .5 Volts tied to it to give
open circuit detection. In that case I would not attempt to measure
its resistance. I'm more familiar with DMM & switchboxes. For those, the configuration is all in
the programatic commands sent to the DMM - so changing from
The example that Nirmal posted is pretty much exactly the same as one
of the shipping examples called Cont Acq&Chart (buffered). Looking
through the examples that come with LabVIEW is the best way to get up
to speed and should be the first place to look for help.
Hi Mike,
I am using ftp transfer with LV7 and have used it with LV6.1 with no
problem.
What ftp server are you using? Give us more details.
However, I did have an experience where at first I thought the files
were dissapearing. I was sending the files to an embedded system
running Linux. The f
Hi Les, how do you propose taking a resistance measurement on the
channel if the channel has been configured in MAX for temperature?
Can you reconfigure channels programmatically using LV?
Thanks very much Nirmal,
i used this in my project, Now the continuous acquistion is working
fine
hemaa
Look under:
Functions
All Functions
String
String/Number Conversion
[EMAIL PROTECTED]
One thing that you didn't mention was whether or not you were using
one NIC or two. If you are using two NIC devices, I would suggest
connecting both to the default NIC. Do you have a separate IP for
each NIC? If so are you pinging the one connected to the external
network or the one connected t
Why not simply add another display which has the property "Hex
Display" already set. You could put the display next to the ASCII one
and see both as the vi is running.
-JLV-
Mike,
I have not seen this, however can you attach a simple program and file
to transfer so that we can reproduce it. Maybe I can help you that
way. Sorry I don't have an immediate response.
For those who don't know, here is a link to http://www.mupad.de/schule/en/Documentation/eng/stdlib/pade.shtml";>pade
approximation.
I did not work out the details but it looks like you can use a couple
of the fitting functions in LabVIEW. There is the rational fitting
and the lev-mar fits. You c
Oops, There is no rational fitting--it is rational interpolation.
Mads is correct in all respects. His usability suggestion is a valid
one, but we still need to fix the bug (and will). Sorry for the
inconvenience.
I'm trying to copy an excel sheet to another sheet in another workbook
(and save all formulas and formats).
I'm using LabView 6.1 and win2000.
can you help me with that ?
Thanks.
Probably because the Boolean is set to a "latch" mechanical action.
Change it to a "switch" mechanical action and the error will go away.
James, this is a very interesting problem. I am trying to get my hands
on an HP 53131 or something similar to see if I can reproduce what you
are seeing. One option you can try is to right click on the
Instrument I/O Assistant block and select "Open Front Panel". This
will convert the Express VI
Jim,
You can wire an array or strings indicator to the output of Channels
property node.
Zvezdana S.
You can do this to a graph cursor. These look like points. You can
programatically change the data in the graph, so what you want to do
is possible, but it will take a little bit of coding.
I have developed an application using LabVIEW 6.1 in English. I am
expecting to upgrade to LabVIEW 7.0. Will I be able to handle strings
in Chinese? I am using Windows 2000. Will I need to use the Chines
version of Windows 2000? Will I need a Chinese version of LabVIEW?
Will I still be able t
I use LabVIEW 6.1
I'm reading an instrument using RS-232 and the "Serial Port Read.vi"
The vi reads 3 bytes in ASCII format I need to convert it to decimal
or hexadecimal in order to calculate the instrument output.
It is possible to do it offline (when the vi isn't running) by rigth
clicking on th
Thank you Mr. Greg McKaskle
Can you help me for finding some technical note about "LabVIEW Remote
Front Panels" because I used this feauter of "LabVIEW" in my thesis.
You might try putting a 50 msec delay somewhere in your program loop
to give the CPU time to perform other tasks. With no delays in a
LabVIEW program, it *will* hog all the CPU time.
Rob
The file read functions have a count and an offset input. Just tell it
where to start in the file (offset) and how many elements of the given
data type you want. Read the block, analyze it and then read another
portion of the file. If you want to start where the previous read
stopped just wire the
I would suggest trying to use GPIB Analyzer
(http://www.ni.com/support/gpib/max/analyzer.htm) or NI-Spy
(http://www.ni.com/support/gpib/max/nispy.htm) to see what the bus is
doing. I would also reommend checking out the trouble shooting wizard
at http://www.ni.com/support/gpib/gpib1.htm.
I hope t
I have to navigate through my application without a mouse, using the
tab key, return key, etc. As I tab through the controls I've noticed
that as a control receives focus it is outlined with a black box. This
doesn't seem to be true, however, for the tab control. Is there
someway I can get the tab
I've not heard of anyone doing a device driver in LabVIEW though I
suppose it would be possible using the Inport/Outport functions to
read/write to the boards' registers. I did a little of this once and
it was not a pleasant experience. Typically, these sorts of things are
written in C because of t
This is where LV's polymorph functions make things very simple: just
wire the strings into an Equal? function (from the comparison
palette), if they are equal the output will be a boolean true.
It will be a while before I can finish this up.
So far the laptop does NOT have that ini file setting.
I will check my tower when I get back to work.
I will post here if I figure out why this is happening.
Ben
You are correct!
That gives you two options;
1) Right clcik and choose disconnect from typdef,
or
2) Customize control and make it a normal typdef.
Ben
Is there any simple way to compare two strings. The output should be true or
false.
Thanks
rutekp
I'm not sure if this has been posted before (about 4400 hits came up
for "event structure bug"):
Start with a blank VI, drop an event structure, add dynamic
registration terminals, add and wire register, unregister for events.
Next, drop two "create user event" vis and wire a plain boolean
consta
Because your LabVIEW program can't control when your hardware sends
data, your first issue is going to be synchronisation with the
incoming data and this will be determined by how the data is
formatted. Is each item always terminated with a unique character
(e.g. a carriage return) that never occur
Hi,
1. Charts takes sigle point value like plotting DC voltages, Graph
takes set of values like arrays (1D) which are plotted on Y-axis with
respect to x axis which is integer number like 0,1,2..etc.. ,
XY graph takes bundled array of X-axis & Y axis.
2. Charts are used where a single point value
Excusez-moi que je ne reponds pas en francais...
You also need to install the NI-VISA runtime on the target PC. If you
don't have this already you can download it from the NI site (search
for 'NI-VISA' in drivers & updates). It may be possible to make the
installer for your executable run the VISA
Hi,
1. The graph interprets the data as points ont the graph and
increments the x index by one starting at x=0. If you want a different
starting point or increment, then use the bundle function. Check the
graph examples in the "LV examples".
2. In this case you've to use a continous data acquisiti
"I've got a VME-MXI-2 interface and a VME card connected to a VXI
crate. I'm using the ni-vxi driver to access the VME cards with
Labview in the crate. Using T&M Explorer, I have added this device and
mapped it to A16 address space 0x0 to 0x03F.but The card has a switch
that is set for "Base Addres
User events seems to be a bit bug-infected, it's e.g. very sensitive
to what and when you wire to the create user event function.
When I tried to recreate your problem I was unable to, probably
because I named the boolean constants before wiring them. Then I tried
deleting the constants and wire a
I have an array which contains sample points.
I would like to be able to pick exactly one of those points in the
graph (using the mouse) and move it to another position.
Thanks
Thomas
i am caught in bizarre situation my labview programee takes
100percent cpu time and creates a deadlock
i am communicating with java programme through data socket but labview
creates problem
Dans une application Labview, nous communiquons avec le port s=E9rie
(VISA read/ write). Sur le poste de d=E9veloppement l'application
fonctionne correctement mais lorque nous g=E9n=E9rons un ex=E9cutable
(cr=E9ation d'un programme d'installation) pour l'insaller sur un autre
PC, la ressource VISA
I need to import a 40MB .wav file for analysis and doing so at once
takes up too much memory, can I import a bit of the .wav file at a
time?
I want to fit numerically exponential signal with pade approximant.
Help me please
What is the protocol? How much data are we talking about (KBs) and how
often do you read the data? Is the data just spit out, or do you need
to poll for it? If so do you have to poll for each value, or do you
get all the values in one reply...
Can you provide an example of the string you will rece
An important note - I have the slider set up as a strict type def so I
guess this is why I can't change the value...
Chris, I've never reloaded the USB-232 software or attached the box to
my laptop since your reply, so I don't know if this was the problem or
not. Thanks for the information, and whenever I do get around to using
this box with my laptop, I'll definitely let you know what the story
is on this.
James - what does the response you are parsing look like? I know of
one bug that exists in the Assistant that this could be; if you show
me a sample response I can let you know if this is a known issue or a
new one.
Is it possible to change a slider scale maximum programmatically - it
appears that this value is not a write value using property nodes?
Hi ,
I have always been facing problem while working with graphs and
charts. First of all let me be clear with the data these accept.
further questions as under:
1. If I wire an array (1-dimention) to graph/chart , it plots it on Y
axis. In this case, what are the values on x.axis?
2. If I want to
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