This is usually not too much of a problem. You can create a local
variable from the button and use that to read in one of the loops. You
will not be able to use the mechanical action "Latch when..." for the
button, but have to change it to "Switch when...". This also means
that one of the loops wil
According to the manual, 410 is Query Interupted and 420 is Query
Unterminated. The first can happen when you send a query but there is
still data in the output buffer. If you've requested a certain number
of bytes during a read, you probably need to increase that number in
order to sure that all d
What bit twiddling are you doing and what kind of error codes are you
getting? As one of your previous questions pointed you to the bit
twiddling challenge, it's certainly possible to do in LabVIEW but a
bit more information is required. Posting an example VI with help a
lot.
Hello,
Dave has posted a couple of example programs which use DDE in LabVIEW.
You can find a tutorial by going to
http://www.ni.com
and clicking on "Support." Under Option 3, search
"Tutorials/Application Notes" and enter "DDE LabVIEW" (without quotes)
into the keywords box. One of the first li
Hello tst,
Thank you for your inquiry regarding CPU usage when using an array
covered by a control. After running the VI I understand the problem
that you are having and this problem does exist in standard LabVIEW
7.0. It takes a lot of resources to update a front panel when
controls/indicators are
Hi Ben,
I posted a full explanation to this question in the http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=304&HOID=5065000800F4C0&USEARCHCONTEXT_CATEGORY_0=_49_%24_6_&USEARCHCONTEXT_CATEGORY_S=0&UCATEGORY_0=_49_%24_6_&UCATEGORY_S=0>
LabVIEW General Insights .
As to
I remember the 5.1 licensing. It used to be that you could distribute
an EXE that you made with LV5.1 to 6 (I remember the number 6) other
computers, but you could distribute the EXE to as many computers as
you had NI cards in (and only NI DAQ, GPIB, etc. cards - no other
vendors). We thought that
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
For reading binary, there's one example called Read Binary File that
reads a file of DBLs. You can modify this to read whatever you want.
If your data is integers, wire an I32 constant to the byte stream type
input of the Read File function. If your data is floating point,
replace with a SGL consta
Hello,
LabVIEW does support ActiveX controls, which I believe would be the
way to access AOL Instant Messenger. However, I do not know of any
current ActiveX controls that have been published by AOL for free
development purposes. You may want to go browse through AOL's website
for this control.
Hello,
Can you provide any additional information about this memory error
such as the error message? Also, is this a LabVIEW memory error or a
Windows memory error?
Crashes in LabVIEW when working with CINs are frequently caused by
errors in the C code of the CIN. Since a crash doesn't happen f
Hello Helmut
Problems with arrays is that you must reserve some space in memory for
them. You can do it from CINs using the "memory manager" from CIN
tools, but the easier way is to build the array in LabVIEW and pass
the pointer top the dll. Inside DLL use this pointer to load the data
to it and
I have similar problems with ActiveX VB DataSocket component and
DataSocket Server. I have a dual processor XEON machine and if I
enable either the second processor, or hyper threading then the
application in the auto-read mode (answering interrupts that are sent
from the server to a subscriber) wi
Hello Wayne,
A good place to start for example code is the product manufacturer and
it seems like you have already done that. National Instruments also
provides example code we have created as well as from other users.
You can search this library by going to
http://www.ni.com
and clicking on Supp
Hello,
I am not familiar with the databound grid control you refer to or with
databases in general. However, instead of recreating its
functionality, you could look into the LabVIEW Database Connectivity
Toolkit which simplifies database communication. You can find out
more information about thi
I pull fiftyfour bytes of data from MicroProcessor's EEPROM using
serial port. It works fine. I then send a request for 512 bytes and
my "read" goes into loop condition, no bytes are delivered and system
is lost
I pull fiftyfour bytes of data from MicroProcessor's EEPROM using
serial port. It wo
My main VI calls sub vi's which open and close or sometimes not but
the main VI should come to the front when executing in its own domain
such as when it is time to select another choice.
The question is " How can I make my VI come to the front of the
desktop when needed?" IS there a foolproof way?
Hello,
The preferred method of database communication with LabVIEW is the
Database Connectivity Toolkit. http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/f763aa1d7cd3c83d862568e8007c51cd?OpenDocument";>Here
is a link that may help you find more information about this. Also,
you m
Hi Mudda;
Assuming you are using Windows, with LabVIEW, you can create the
necessary files to create a help file, but you can't create the help
file. In order to create your help file, you need a WinHelp compiler.
Also, what LabVIEW allows you to do is to create a file that
correspond to the doc
John,
This seems to be working, let us know if you continue to have
problems.
Regards,
Sarah
Hi Guys,
I could figure out the way to do this, Thanks a lot.
Ajit
If I understood you correctly, you are reading the two current
positions (1)-up-down and (2) left-right, and you have two set
points (one for the up-down and the other for the left-right position,
read by the master. And the objective is to make the readout for the
positions as close as possible
I believe that there is an Email with Data.vi example that should help
you.
However, it should be pretty straight forward. As an example:
1. Open SMTP Email Send File.vi
2. Fill out the recipient's email address in recipients
3. Fill in the subject
4. Fill in the message
5. Fill in the path to t
I am using Remote Panel in my application. I use string control where
user enters some information through remote panel to the software.
While entering the info in the string control in remote panel (using
IE 6), If i mistype any thing and hit back space, IE goes to previous
page. Instead I would l
In my program, it will generate data continuously and I would like to
store these data time to time in an array. Could you suggest me a
method?
For example, 1.77,1.67,1.56,1.89,1.99... (these data generated
continuously)
1st second: 1.77 1.67,1.56,1.89,1.99( store in array)
After 1 second: 1.67,1.5
There are two VIs called "Wait" and "Wait Until Next Multiple" from
the "Time & Dialog" pallette which you can use to delay your each send
operation.
Joe
I want to improve my app by putting some visual indicators in the form
of 2 pictures , an arrow up and down , and would like these to blink
according do wich way the numbers are going positive or negative when
the data values on the displacment channel are changing ,Cant seem to
find any vi to hel
We have a third party ActiveX executable that refuses to shut itself
down once in a while. And when I say once in a while, I mean one out
of every 20-30 times it's attempted. All termination commands are
being sent and recieved properly, and all refnums are being closed.
No errors are ever genera
i want to display the fourier output of some ascii data that i saved
to a text file. however the input to the FFT block must be complex
valued.how am i to know what i see is actually the fourier
analysis?please help
I have two separate while loops and I want a single button to perform
the same task in both loops. Is there a way to configure this or am I
stuck with having 2 buttons?
I am reading the User Manual( Labview 7) and I don=B4t umderstando what
differences are between save one Vi as *.vit or *.vi?I would like to
know the differences beteween vi templates and vi!!!
Thank you!!
Dear all,
i am now writing a vi to control the HP335b,
when i run a simple driver's vi (like getting started.vi) i found that
the "ag3325b Configure Standard Waveform.vi" got a error and the error
code is Hex:BFFA0010
ag3325b Configure Standard Waveform.viDriver Status: (Hex
0xBFFA0010) Invalid val
A very frustrating problem. Have you ever been editing with a labview
window (6.1) when suddenly you notice that the scrollbars on the side
and bottom of the window are no longer enabled? It happens very
infrequently but when it does the only way I can edit around the
window is to drag an object to
I am trying to create a LabView Dll, however i keep getting this error
whan i attempt to build it. I have created Dll's before but all of a
sudden it just stopped working. Has anyone else seen this and can
shed some light? I'm using LV 7.0
I am doing real time feedback control(PID)that controls (drives) the
up/down motion of Z-piezo in atomic force microscope (AFM) using a E
series DAQ NI6025E.I collect a single scan of data from the AFM,
perfom some analysis on it,update the driving signal based on a
measured value and send out the
Hi,
I have made some bit twiddling operations.but the output are error
codes after running every time.for example,the output strings are
error codes when I make bit twiddling to the input binary
"00001111".Could anybody tell me the reason why bit twiddling
deos not work?
Sometimes when I open up a properties dialog box for a waveform chart,
the Labview 7 locks up. Other times it takes a long time to update
the entry and go on to the next. Especially when editing the plot
names. This seems to be always when I have a waveform chart that has
multiple wave forms goin
Hello, all. I'm helping a colleague with an application measuring ten
channels each of temperature, frequency, and current using an Agilent
34970A DAQ switch (GPIB) and LabVIEW 7. We keep getting errors 410
and 420 from the switch. When the error occurs, then the switch
doesn't report all 30 pie
I am plotting 20 points of data using the Waveform Chart. The data is
sent to the chart as waveform;
t0 = 180, dt = 5, Y = my data points.
I am using the XScale.Range property to set the following:
Min = 180, Max = 280, Increment = 10, Minor = 5, Start = 180.
When I send the data to the chart it st
In my program I am sequentially grabbing 69 bytes from the serial at
38400 baud rate.
However, the rate at which my VI is grabbing the data is too slow. Are
there any methods of making it faster, assuming that I cannot use a
high speed serial?
I am using Labview 7 and I have a question about some of the new
features. I am trying to input 2 channels and graph the output
amplitude and phase difference. I have tried using the "new"
interfaces for "spectral" and "tone" measurements but I am unable to
achieve the desired results. I am trying
What happens when a VI template (.vit) is opened in the LabVIEW
Runtime? Does it open a file with a new name as it does in the
development environment?
Allen
i am using the "propery node" to set
the "VISA READ" control
its node "termination character enable" does not affect VISA
functionality
when termination character exist (or default)
the "enable" does not affect..
please your advise..
thanks
simon
Is it possible to program a java applet to access information from
instruments using DataSocket? Is there an API? There is an API
announced on this website:
http://flagpole.mit.edu/applets/DataSocket/DS-HOWTO.html
It says it's a Beta but I cannot acces the link that redirect on NI's
Website
I've never messed with PID's but I'm working on a project that I
thought would be simple until someone told me that I needed to
calibrate my system to another system using PID's.
So here goes with the question. I have a pedistal that moves in the
up/down (elevation) and right/left (azimuth) posit
I am trying to send an email from within LabVIEW 7 using the SMTP Send
Multiple Attachments.vi
I need to attach an MS Excel file (.xls)
The recipient gets the email with attachment, but the file is
corrupted (invalid format) and can not be opened. Is there an example
of how to accomplish this?
I have two questions regarding the high speed data logging VIs
available at the following link
http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B45EACE3EE4756A4E034080020E74861&p_node=DZ52303&p_submitted=N&p_rank=&p_answer=&p_source=External
1) When we retrieve the data is it in d
Well, I have read several posts about this error but they all seem to
deal with "opening" a file. I am getting this error when I use the New
File VI from the advanced VIs under File I/O.
I'm running Win XP but I don't have MS Office so I don't think that
Fast Find program could be the problem. I'v
I need to pass data to a subvi which has while loop inside. And the
data need to be seen in while loop. How can it implemented?
Thx.
I have a for loop that is going to write a number of files. I wish to
name all the files differently bu have to many file to type in a new
name each time. I there a way to say add the loop iteration to the
filepath to create a contiuously changing file name? E.G iteration 1,
Datafile1
iteration
please your advise..
i am using now the trial version..(labview#7)
when i run the application few times
all indicators preserve last response/status
and it is not good for beginning the next RUN...
how can i PRESET or CLEAR my controls on front panel
to a default value/status?
My application crashes for memory error on LVS61D5 module after
several hours of running. The application is built using Labview 7.0
and frequently calls one CIN (Visual C++ compiled) that controls one
ISA acquisition board.
Large amount of RAM is used in the CIN C++ code (up to 2560KB) to
temporar
We are looking to upgrade a Labview 5.1 Professional (with 5 run-time
licenses) to 7.0. Our understanding is that all 5 run-times must run
the same executable built from the Application Builder. Is this true
or can we have different run-time executables?
Thanks,
Tim Bretz
i want to read a encoder input{A and B} using a 6014 daq card,i plan
to use the 2 counter inputs given,can i use it and can any one tell
me how.
Bloomy Controls is seeking engineers with strong LabVIEW skills and
experience for the following career opportunities:
o Project Manager -- Milford, MA
o Project Engineer -- Milford, MA
o Associate Engineer -- Windsor, CT.
Outstanding employee benefits include medical, dental, disability,
pension
I have a VI library, under Windows. This library contains a bunch of
SubVI who call our libAPI.dll We are currently adding support for
Linux. And, thus, have the equivalent for our libAPI.dll which is
libAPI.so for Linux. Is it possible to use a generic name in the field
for Library name or path AP
I would like to open a .bin file in LabView for DSP purposes.
2 questions.
1. Hoe to smoothen out the graph. like 3 point or 9 point smoothing.
2. I am taking data and plotting it at the same time but each time it
changes color. Is there anyway I can make it not to change the color.
thanks in advance..
In anticipation of help
-priiyank
I am using LV 6.1 and Win2000 and MS Office 2000. I have created a
simple form in Excel that I populate with data through Labview. Has
anyone ran into problems with versions of Excel? i.e. what version of
Excel do I need to create my spreedsheet in so all version of Excel
can access it when I ca
I want to create a help file describing my VI. How do i do that by
clicking a control. How do I store the help file.
does anybody knows a minitel emulator under labview?
thank you
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