I've seen this happen when I stop a VI without closing all the GPIB related
references. Closing LabVIEW closes these references. Trying to rerun a VI
without closing the references can cause LabVIEW to just quit and a reboot
seems to be the only way to clear the problem after that.
Kelly
Kelly
Hi,
I'm trying to write a simple labview program that accesses and
extracts some information from a SQL database. Can anyone give me
some pointers? Thanks in advance!
~Julie
I have a problem with menu of child window VI.
When I click a menu item and sub menu is expanded on one of opened windows
(window is a front panel of VI template - child wnd) mouse click on any
other window cause that system W98 crushes (only W98).
The only solution is to restart the PC.
Regards
Hi All,
This may sound naive, but I have a customer who wants to sample up to
6 channels across 3 boards (2 channels/board) at a sampling rate of
10 Megasamples/sec/channel (i.e., 60 MS/s in total).
Three different units are being measured simultaneously, which is why
3 boards are necessary (t
I have a Silicon Graphics 320 visual workstation which I wish to grab
frames from the integrated video I/O system. The operating system is W98
and I am using Labview 6.0. As this is out of my normal area of programing
with Labview I was hoping that there would be someone that could point me
in
Hi Dan, - quick note, your direct email addr bounced back to me as
undeliverable - I hope the list doesn't mine the reply.
I think the 1000 degree requirement is unusual, but probably not
impossible, since the thermal shock testing would probably involve
moving the test object from one -40 ch
Hello newsgroup!
I´m a newbee reagrding labview, and want to get data from an ELV M232
A/D-Converter.
In the handbook of the converter the commands are listed...
Every command beginns with [SOH], and ends with [CR]. I´ve tried to use
LabView 7´s Instrumental I/O-Assistent, but i get an error wit
Hi,
Is it possible to associate a type of file, like *.txt with Notepad.exe,
with a LV7 app.
I know that LV7 have a new feature that permit to retrieve the command line
used to call the app.
But I dont think that would be useful for what I want to do.
I want to Double-Click on my file and my LV
Our measuring instrument returns its data in three 8-bit bytes. We
are trying to log this data in a nice format to a log file. Currently
we have the logging, but translating the data to the format used on
the display of the actual measuring instrument is turning out to be
amazingly difficult in L
Ok it works, I forgot to enable, "Pass all command line arguments to
application" in Application Settings of the app builder... by the way for
what reason is it optional?
Thank you all for replies
Dany
-Message d'origine-
De : Dany Allard [mailto:[EMAIL PROTECTED]
Envoyé : 11 février 2
I know how to associate the file, but how to retrieve the path of the
file???
Khalid,
I try the 'App.args' property and the file path is not in the second
element. I only get the name of the app at the first position of the array
and the rest is empty.
Do I have to do some DDE thing in the file
Hi
I got a strange event behaviour. I have an interface with an event handler
in a while loop (#1) and a while loop (#2) in parallel. In the WL#2 I
generate event and the event handler react. When I exit the panel, the close
panel events is trigged and stop the WL#1, but some time I have couple of
Hello!
Thanks for your response!
I´ve already read this thread, but the termination character doesnt seem to
be the problem...
I´ve tried usinf a COM-Spy who shows everything that is sent or received
from the com port.
When i try the program that came with the ADC, this string is sent:
#01a0 [
I'm having a bit of hassle getting an RFID reader to work- Texas S6050. It
is very simple; you send it a carefully crafted stream of bytes and it sends
a similar stream back. Or goes completely dead. It has a "data" light on the
front that flashes when it's communicating with the PC. This light fla
I'm the only LabVIEW programmer here and just talked out IT guy into
"storing" an extra 19" monitor next to the one already on my desk. He had
to install a PCI video card so I have two cards. The new one is a PCI ATI
RADEON 7000 and the original is an AGP ATI RAGE TURBO PRO 2X. Both work
well bu
- Original Message -
From: "Scott Hannahs" <[EMAIL PROTECTED]>
To: "Craig Graham" <[EMAIL PROTECTED]>;
<[EMAIL PROTECTED]>
Sent: Friday, February 13, 2004 3:29 PM
Subject: Re: Serial comms
Thanks all for the responses.
> One start bit is the only option. I have never seen a device tha
- Original Message -
From: "Scott Hannahs" <[EMAIL PROTECTED]>
To: "Info LabVIEW" <[EMAIL PROTECTED]>
Sent: Friday, February 13, 2004 4:08 PM
Subject: why I hate express vis.
> Opening diagram extends over about 7 screens horizontally and 6 screens
vertically (1600X1200 pixel screen
Thanks guys. We already had the bytes picked out of the array and
ready for processing. The solution was to use the 'number to
hexadecimal' function under the Strings heading. Then we had a string
literal representing the direct, actual characters of the hexadecimal
value of the byte.
This was q
Hi there!
i´ve now managed to send the correct command to the ADC.. and the ADC
responses with 13B1#06 for example. But i still get the timeout errot - the
I/O assistant doesnt seem to recognize the answer from the device.
I´m using the command \1a0\r with the query and parse - command.
any idea
Hello All,
I'm new to LabView.
Would someone be able to supply me with a complete 34970A VI ?
Thanks..
Craig Graham wrote:
> Nope, I am indeed on Windows. However I have found a couple of
> software-based snoopers that I'll try later if shoving a terminator in
> doesn't help. Glad it's looking like I don't have to write my own
> analyser.
Arse. The snooper (PortMon- thanks to whoever suggested that
Jonnie 5 <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> If you're talking about an HP/Agilant, there are vi's included with
> the driver:
> http://zone.ni.com/idnet97.nsf/9b2b33e1993d877786256436006ec498/e4c553c139f78062862568ab005fba3c?OpenDocument
>
> See also:
> http://excha
I tried the examples for rs232 communication, it works fine.
but my equipment is slow and needs delay between each character.
i didnt find any input to Visa write or other control which enables me
to do this.
can someone tell me how to do this?
again: to make a delay (inter digit pause) between ea
Hi
I am looking for a Labview program to allow the freq. response of say a
tuned circuit.
I will be using a GPIB Function Gen. From 1Hz to 10MHz and measuring the
peak-peak value across a shunt resistor that is in series with the tuned
circuit.
Thus as the frequency increases then the tuned c
Hi
I have just installed the demo from NI of Labview. I am trying to run
Instrument I/O Assistant. Open blank Vi then select GLIB and sure enough
Instrument I/O Assistant dialogue is there. However, when you double click
the box, as the help suggests, it report that Measurement and Automati
Hello,
I have NEVER used Labview before so I will be registering for the
basic course soon. But one of the things I would like to do with
Labview is to read two columns of X and Y data from an excel file,
plot it and determine the area under the curve. I found various
examples that would do this,
Try this. Activate the Windows Task manager so you can see the
processor usage then make your version 7.0 application the active
window.
Press the ALT Key down and release it.
This will cause the processor to go to 100% and stay there. Press the
key again and your processor will return to normal
In my VI, I need to set a digital line if the measured input voltage
changes too rapidly.
I've created a simple VI and placed the DAQ Assistant in a While loop
that measures a 0-10V input voltage via my 6024E-DAQCard. The VI uses
a global channel named MyVoltage that I've created. I've set the
Ana
shoneill <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> I understand from Greg McCaskle's answer that this is something which
> may come in future (And judging how far LabVIEW has come, I'm sure it
> will be incorporated).
>
> If you're developing code in other languages which
cosw <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> I cannot understand this. Why its better not using continuously
> running? Its very difficult for me to change the whole program.
>
> I have a while loop which execute code every some milliseconds. The
> loop runs until a bina
Jack,
Well, please don't kill ME for suggesting it, but you may get some
relief by adding:
UseDefaultNumDisplayFormat=False
to your preferences file. Having to do this ONCE for each LV
installation where you work can't be as bad as getting carpal-tunnel
from option-clicking and changing the for
On Wed, 18 Feb 2004 09:55:03 -0600, Jeremy Braden wrote:
> Testing what?
Well, I guess this is a test and measurement forum ;-)
Hello
Due to an outbreak of anal retentiveness (or maybe it's due to
carelessness!) I need to set certain Labview installations to match the
License numbers. We had several licenses but I installed the same copy to
several computers, now I need to align the machines to the Licenses. I've
gotten the
Hello
We have a differential pressure gauge which shows a different zero depending
on the absolute pressure. The curve of offset to pressure is a parabola over
the area of interest. How do people normally deal with this issue? Is it a
bad gauge or do we just incorporate an offset calculation into
Hi all
I am capturing data ( kN values ) Also a peak value detection as well , I
want to make the stop button blink red when the current value is less than
the peak value therefore showing the sample has failed. I have been working
with the property node blinking property node, and using the compar
First step would be to contact your admin. If the admin was the engineer
himself, contact him. BTW these suggestions assume you are using W2K
-
Mohan Pawar
"Paul Lopez" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> The Engineer that designed our Labview Data Aquisit
Hi all
My equipment is connected via rs232 to the pc, it has its own MMI
which is pretty slow, meanning menemonic rate..
when sending command using the serial examples given by labview
the equipment loses characters..
What i need to do is to send commands (via rs232) to the equipment with
delay b
"[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> I have a memory leak problem with an application built under LabVIEW
> 6.0.2. I have found that the source of the problem lies within a loop
> of code that runs every minute. It reads numbers from a remote data
You just have to send char by char with the delay between instead of
sending the hole string.
Hope that helps, Niko
Simon wrote:
> Hi all
> My equipment is connected via rs232 to the pc, it has its own MMI
> which is pretty slow, meanning menemonic rate..
>
> when sending command using the seri
Hi:
If it is a standalone machine it is going to be difficult. For a standalone
machine my best suggestion is to backup all files related to that account
before doing any experiments with files related to that account. Windows
2000 is remarkably unforgiving in case of inadvertant changes made to
The default users menu will cause the processor to go to 100 % when
the alt key is pressed. With a special runtime menu for some reason if
the menu drops down the processor speed drops but if the menu is
highlighted it goes to 100%.
If there are no performance hits perhaps I over reacted. I first
Thanks Carlos
The latter method I did not think of but will try it.
Cheers
Wayne
"JuanCarlos" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Wayne,
>
> Looks like a sweep sine analysis should give you a good idea about the
> frequency response. Make sure that you measure the inp
> I don't remember the details, but the Alt key is tightly tied to
> numerous behaviors on Windows. Either LV has started the menu walking
> behavior and the events are pouring in, or I seem to remember some other
> Alt key modified actions defined by Windows, sort of like Alt-tab, but
> affec
Process Systems <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> Take a look in the Functions/analyze/signal processing/time domain and
> select the Derivative x(t).vi. This should do the trick for you.
>
> Good luck.
>
> Dave
Looks promising! So, given 100 samples to read at
Hi
I have recently bought a PicoScope ADC200/20 and downloaded the "drivers"
from pico.
However, I am keen to acquire any further examples in Labview. Has anyone
out there either attempted or have acquire further example vi's for the
ADC200 range
Cheers
Wayne
I have a file with 41 channels in it... every chn is 4 byte. So I want to
make a VI reading every 41x4 bytes put it in an array and write to ASCII
text file.
I am very new to LabView.
Can anyone point me to an example?
I was searching here http://www.ni.com/devzone/dev_exchange/ex_search.htm
but
Hi all
I am capturing data ( kN values ) Also a peak value detection as well , I
want to make the stop button blink red when the current value is less than
the peak value therefore showing the sample has failed. I have been working
with the property node blinking property node, and using the compar
i posted a message 3 times but it didnt show up
how comes?
"Van626" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> 'C:\Program' is not recognized as an internal or external command,
> operable program or batch file.
> Error executing c:\winnt\system32\cmd.exe.
The error message leads me to think about file naming method .***
with 1
George,
I use this technique frequently for large control systems where multiple threads
update their corresponding front panel data. I have even toyed with
the idea of allowing the threads to detect their own events (instead of the launching
thread detecting and messaging) with the dynamic eve
Looks like the webserver from NI's exchange could be messed up. The news
server has been working fine for me. Haven't missed a message yet. If you
use windows try FreeAgent. On Linux try Pan or slrn or ...
Use NI's news server:
newsgroups.ni.com
port 119
no authorization required
IMO, everyone
I have a VI that communicates via GPIB to an instrument (Keithley
2400). When I execute it step-by-step in debugging mode, it executes
correctly, but if I let it run freely, some commands do not execute.
Any ideas?
Thanks,
--
germRemove "nospam" to reply
dear sir
i want to programe a cuteftp with LABVIEW
but i am not clear about how to do
Hi
I am using datasockets to connect to a third party program which drives a
DAQ system (Fluke DAQ with a 2680 system). That program comes with an OPC
server which publishes the measurement data. With Labview I can subscribe to
this data using datasockets, and this runs fine for most of the time.
On Tue, 24 Feb 2004 09:18:42 +0100, Helmut Halfmann wrote:
> I have a shared library on my linux system I like to use from labview. To
> exchange simple integers and strings between there are no problems.
>
> Now I like to get an array of integers from my library which I like to treat
> as an arra
Process Systems <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> The number of samples is irrelivent. The delta-T is derived from the
> sampling rate. In this case, 1000 HZ sample rate corresponds to 1 ms.
> delta-T.
>
> Good luck.
>
> Dave
Hmmm...I've wired it up, but it looks
For simplicity's sake, lets say I have a cluster with one boolean
control named "OK". Is there a way I can set it up so that the event
for OK->value changed is executed whenever I write the entire cluster?
I'm only interested in executed that event when one particular element
of my cluster has ch
In article <[EMAIL PROTECTED]>,
<"[EMAIL PROTECTED]"> wrote:
> Hi germ,
>
> I have some of these K2400 in use - wrote my own driver at a time,
> when the "official" drivers were
> not available - up to now without problems - in stepmode or fast.
> Pls send your vi - or picture of Diagram for disc
In article <[EMAIL PROTECTED]>,
JDesRosier <[EMAIL PROTECTED]> wrote:
> 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
Dear Shea,
Many thanks for your answer. I am running Labview 6.i (version 6.0) so it is
likely that my problem is caused by the reason you are describing. However,
I found on the NI website some discussion on the compatibility of DataSocket
with OPC servers, where it was mentioned that the OPC exa
Wireworkers
How can I do a comparison in that, I have a machine witch travels up and
down and the linear transducer sends this data position (displacement) to my
application, I have a vi witch will accept a t/f and will flash arrow
pointing down or up . I want to wire this up to the rest of my ap
When I have a strict typedef as the datatype of a queue, and I hold the
reference to the queue in a global, changes to the typedef don't propagate
to the global reference. Is there a way to make it happen? A different way
of creating the reference for example? I'm presently using the context menu
"
Interested?
Check out
http://groups.yahoo.com/group/eaglecad/
George Gatling (Contractor) wrote:
> but I am still latched on to the idea of moving the updates into
> their own sub-hierarchy and out of the top level. This will incur
> the by reference performance hit, but for now that is not a big deal
> for me as I only need about 0.5 updates/sec. And when
Thanks to those who replied.
I had a caffeine deficiency moment when I posted this message and it was
completely wrong. The problem was trivial and elsewhere and I jumped too
quickly to thinking the global wasn't updating!
Interesting idea on the queue wrapper, but I don't think I'll make much us
Brett Scott wrote:
> Wireworkers
> How can I do a comparison in that, I have a machine witch travels up
> and down and the linear transducer sends this data position
> (displacement) to my application, I have a vi witch will accept a t/f
> and will flash arrow pointing down or up . I want to wire
Hi
I am pretty new to LabView programming and am having a
project that involves acquisition using GPIB. I have
never used GPIB before.
The two instruments that that I will be using are
Keithley 237 HV Source and a HP Agilent Multimeter.
The process is basically applying current from the
HVsourc
On Tue, 24 Feb 2004 07:50:58 -0600, Joe Guo wrote:
> One way is to use ActiveX if cuteftp supports it.
> Another way is to use windows script object through labview.
> I also believe labview has some ftp utility available, It might be
> included in the Internet toolkit.
>
> Joe
Or you can get th
Dear List,
I've tried just about everything to solve this problem
with no luck, so I was hoping if the list had any ideas.
Basically I have two parallel loops running (Event Loop and
IMAQ Display loop), however every now and then when
I click on the IMAQ window to draw an ROI on the front panel
t
Hi David,
DM> I'd like to know if it's possible to capture webcam
DM> images with LabView ... Any ideas/comments?
I've done some rather brief google-ing on the subject about
a year ago, and here is what I found and bookmarked:
http://www.warwicktech.freeserve.co.uk/lvdownloads.html
http://www.mi
[EMAIL PROTECTED] (Rob Hulsebos) wrote in message news:<[EMAIL PROTECTED]>...
> Hi,
>
> For those of you who are interested in fieldbus networks
> and their protocols, take a look at
> http://ourworld.cs.com/rahulsebos/Links.htm,
> where you'll find further references to more than
> 350 systems,
Hello,
I'm busy writing a little programm wich should generate different digital
outputs:
Is there a simple vi which demonstrates how to fill a buffer with say 1000
points (an array of 1000 U8's) and the writes the data to my digital output
with a frequency of 1000 Hz and then stops!
I thought it
There are "Drivers" for most instruments. You can find them at National
Instruments web site, which is a great resource.
For the Keithley 237
>http://zone.ni.com/idnet97.nsf/9b2b33e1993d877786256436006ec498/c09c16a5d9f
97468862568ab005fb963?OpenDocument<
You didn't specify the model of the Agile
While I've visited the OpenG.org website, I am a little surprised that
there are not more ready-made VI's available for various common
gauges. Does anyone have any general pointers on where to look?
Thanks,
- Chris
Let's say I have a one-dimensional array with 100 elements. I need to
average the 3rd through 97th elements. How would I do this?
Jeff
Hi,
I use VNC to remotely control a PC executing LabVIEW VIs. It
works, but "menu ring" (pop-up menus) controls do not work when
remotely clicking on them.
Any idea?
Thanks,
--
germRemove "nospam" to reply
We have a web cam application where images are made from 2 cameras once per
minute and stored for 24 hours. Other parts of the application can pick a
particular image or play an accelerated view of them for trouble shooting.
The application relates to monitoring a physical property in the ore
conce
Thanks for you answer, I have an E-series board AT-MIO 64 board, I'm trying
to connect a DIO config VI, but i don't know what i have to fill in at the
"port list"connection? It should be a 1D string array? All i want is the
first 8 digital channels, 0 -7 and i want to call them with a U8 array.
I h
George,
I understand your frustration, and came up with a solution a long time ago (LV 3.1
anyone??) that works for me. Unfortunately it does require a little discipline at the
start and during the development of a project. I ALWAYS keep my projects in their own
folders within the LV subdire
Hello,
I've just come to the conclusion that my AT-MIO-64E doesn't support the
function of a buffer for digital output.
Does anyone know if there is a secure (ms level) way to build a vi that
reads an array of U8 (150,000 points array) with digital data (1000Hz) so
the output array take 150 second
Hi there,
I am currently writing a shared library to do some specific image
processing. This is very application based library and is currently only
designed for one application. The problem i have is that i am very new to
the world of Mac OS X. I have my code to compile in Win32 a DLL that
expo
Scott Hannahs wrote:
> Compression/Compression/Compression! MPEG-4 can maybe give you a
> factor of 24 if you turn the key frame rate way down. Lossy
> compression is acceptable since the alternative is Analog tape that
> One of the kickers is "professional quality". That may be at least
> 32
Yonatan Tidhar wrote:
> Yes I thought so, but way should the execution should be depend
> Were the front panel is open or not? No meter if I leave open
> reference to the VI
> I was expect that the vi execution will continue until the code ends.
As I recall, this was the behaviour a few versions b
i'm having problems setting up the express vi for write to
spreadsheet. I'm trying to write data to an excel spreadsheet. I'm
getting and error
Error 1 occured at Open File
Possible reason(s):
LabVIEW: An input parameter is invalid.
---
NI-488: Command requires GPIB Controller to be Controlle
Launch LV7, make a new blank VI. Place an "OK" button and a decoration (a
triangle, in my test). Select the decoration and ctrl-C to copy. Edit the
"OK" button and import the triangle from the clipboard as a decal. Labview
gives a failure message and dies.
Reported using the "investigate now" opti
Hi,
First Thanks to everyone for replying to my previous
post for GPIBs. I found the subVIs required for
communication with the Keithley 237 and also HP
Agilent 34401A and started communicating. While
reading from the HP multimeter I sometimes get error
messages. This does not come always. The sy
I've done a bit of code that lets the user drag a frameless VI about the
screen by clicking+dragging on the inert parts of the panel. It's a fairly
big and self contained while loop that would be better off in a sub-VI, but
I can't figure out how to register the event structure in the sub-VI for
ev
Dear Group,
Please can anyone tell me roughly how to achieve the following, before
I obtain LabView:
We have a GPIB instrument that takes many measurements; we need to
create an automated test routine using it. I'm assuming it's easy
enough to set up 2-way comms between our PC and the instrument.
Thanks, Rolf.
I thought about trying an iteration on "callees" so that the scheme
would work even if more functionality (and thus more subVIs) were
added. (I got caught first by Simple Error Handler calling General
Error Handler.) Originally, I had hoped to avoid subVIs entirely, but
I managed
Hi
I have been working with a vi witch connects to a serial port and reads load
and displacement, how can I simulate the type of data I would normally be
receiving , so that I can test everything thoroughly, without actually
connecting to the instrument at work. There is a peak load detection and
Sorry for the second post.. Its actually been a day
since my first post. Sorry if two mails come up.
Hi,
First Thanks to everyone for replying to my previous
post for GPIBs. I found the subVIs required for
communication with the Keithley 237 and also HP
Agilent 34401A and started communicating.
LabVIEWers,
GhostBuster.vi has been fixed to run on all versions of LabVIEW from
6 through 7. If you have the version that uses Simple Error
Handler.vi, please download the revised version from
http://www.SULLutions.com/LabVIEW.html.
GhostBuster still does not detect minimized VIs. If anyone c
Hi
Does anyone know if there are example programs for the Velleman PC function
Generator?
Cheers
Wayne
Hi
Does anyone know if there are example programs for the Velleman PC function
Generator?
Cheers
Wayne
Hello
I am working with a Watlow controller via serial interface and finding the commands a
little cryptic. Can you tell me where I might find the Watlow96.llb you mentioned?
Thanks
Hi,
Can anybody help me out here?
Thanks,
Allan
Halloechen!
I try to find all conncected GPIB devices with the GPIB function
"FindLstn". However, additionally to the really connceted devices
this function find something with address #21. If I disconnect all
devices, it really finds nothing (as expected). But no matter
which devices are activ
Hallo,
ich habe einen ausführbaren Programm erzeugt den ich einem Computer (nur
Treiber für Ni-karte mit daq und runtime) installieren möchte um eine
Maschine zu steuern.
Wie kann ich diese Applikation speichern, als exe, install oder setup
file? Wie kann ich die Bibliothek, dll-files und vi-fil
Halloechen!
Fahri Sari <[EMAIL PROTECTED]> writes:
> ich habe einen ausführbaren Programm erzeugt den ich einem
> Computer (nur Treiber für Ni-karte mit daq und runtime)
> installieren möchte um eine Maschine zu steuern.
>
> Wie kann ich diese Applikation speichern, als exe, install oder
> setup
I'm directly measuring the voltage from a 1.5V battery for example
using differential input with unshielded 1m cable from the terminator
board to card. Even using the Test Panels with my DAQCard 6024-E
PCMCIA card in my laptop I see lots of noise, +/- 1 volt or more. When
I remove the AC power and
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