How to Program with Labview over GPIB BUS to measure dc&ac voltage through TDS3014 Scope driver

What I want to measure are Vpeak-peak,Vrms,Vmax,Vmin for both DC and AC voltagee(the output of a power supply). May I begin with the Getting Started.vi? Waiting for you help nervously.

Hello-
See ivifoundation.org for the IVI specs. There is probably a function to do this operation.
Randy Solomonson
Application Engineer
National Instruments

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I want to send 10 bit ADC from PIC via serial communicaton. i send it separetly 8 bit first then the other 2 bit. how to program in labview to capture those two packet then combine it togother

i want to send 10 bit ADC from PIC mCu via serial communicaton.
i send it separetly 8 bit first then the other 2 bit (2 bit --> with zero at 6 bit from LSB).
how to program in labview to capture those two packet and then combine it together
so i have 10 bit in lab view
thank you

Close, but now quite. You need to specify to the VISA Read how many bytes to read, not how many bits. Thus, the input would be 2, not 16. It's also not clear why you're trying to use the "String to Byte Array". The Type Cast will give you a number based on what data type you wired. You're basically telling it how to interpret the string. In this case we're telling it to interpret the string a 16-bit value, so we'll get a 16-bit integer. I know you said you wanted a 10-bit, but you can't have that. You'll get a 16-bit with 6 bits set to zero. Note: I did not completely understand what you said so we may need to change this slightly, but we want to get the communication and reading collection working first.
Also, since you seem to be setting this in a loop you probably want to monitor this or to collect the data. For that you need a shift register. See attached for a modified version of your attempt. You need to set the datatype to I16 or U16 based on whether the value you get from the PIC is signed or unsigned.
Message Edited by smercurio_fc on 05-01-2007 02:28 PM
Attachments:
Read PIC.vi ‏21 KB
Read PIC.png ‏7 KB

HP/Agilent Infiniium 54831B scope - how to connect with LabView 6.0 by LAN (TCP/IP)

Dear,
I'm looking inf. how to connect Agilent Infiniium 54831B scope with LabView 6.0 by LAN (TCP/IP).
Thanks in advance.
Regards,
Z.Mrowka
mailto:[email protected]

Hello,
If the instrument is capable of being controlled from its TCP/IP port, it will be possible to communicate with the instrument from LabVIEW using VISA.
The VISA resource name input will need to be entered manually and is a little different from the normal Serial or GPIB format. The format is as follows:
For SOCKET connections, this is just like the traditional TCP functionality in LabVIEW. An example string that connects with the NI FTP site is:
"TCPIP::ftp.ni.com::21:OCKET"
For INSTR connection, this requires a device that supports the T&M standard LAN instrument protocol. An example of this (that we have tested with) is the Tektronix 3054 Scope. A string that connects with this scope is: "TCPIP::HostnameOrIP::gpib0,1::INSTR"
I hope this
helps,
Anthony Bacak
National Instruments
Applications Engineering

How to program with different device by NI-VISA?

Dear NIer:
firstly I will list my enviroment.
SW:Labwindows/cvi 5.5/VISA/MAX.
HW:HP pc/pci-gpib/GPIB-VXI/DD42916.
QUESTION:
1 MAX always think GPIB-VXI/C and DD42916 as a GPIB device.Why don't they think these devices listed above as a VXI device?
2 Since MAX think DDC42916 as a GPIB device, and DDC42916 supports word serial communication, How can I program with this message-based device by NI-VISA?
I searched for appropriate function in NI-VISA ref manual,but I failed.VXI WSPRotocal COMMand is not suitable here evidently.
3 Then how can I program the other device like register-based device and memory-based device under this circumstance?
4 if slot0 controller changed from GPIB/VXI to 1394/VXI
,then how to program?

east-
I see this question was answered (and then discussed again in depth) in the VISA forum. I'm posting these links in case anyone looks here for an answer.
-Scot

How can I with LabVIEW programatically control the RS-422 port?

I would like to talk to my hardware through the RS-422 protocal, how would I do this in LabVIEW?
Thanks alot for ANY help.
Brian

Most likely the communication would be identical to what you do for RS-232, only you would use the port number associated with your serial hardware. Thus you can use VISA starting with the serial examples in LabVIEW.
There are a few extra things like the transceiver control on NI-Serial RS-485 hardware that have special VISA calls, but those are easy to add.

Shut down a non-LabVIEW program with LabVIEW?

I have two programs running on the same computer. One is a 3rd party software package that collects data from a sensor and generates files. The other is a LabVIEW application that analyzes the files before deleting them. (The 3rd party software is written in LabVIEW, but closed source.)
I want to shut down the 3rd party software automatically whenever my LabVIEW application shuts down. If someone shuts down the LabVIEW app without stopping data acquistion on the 3rd party software, the hard drive will fill up with files in about a day. Not good!
Is this possible without having to shut down the computer?
Solved!
Go to Solution.

Will "Task kill" in command prompt help you achieve what you want? Use systemexec in LabVIEW to do this. Post back if this is not what you want.
Mathan

Possible to use mySQL, an open source program with Labview without the use of toolkit, just like we can do with MySQL with Command line.

Hi i am trying to see if I can use sys exe .vi to execute Mysql commands. Is it possible to use without toolkit?
regards,
Clement

Hi. I know there's a free toolkit that use ADO. But the problem is that my company not wish to splurge on the purchase of MS database server or alikes, but prefer to run MySQL. So can I do the labview with the MYSQL only?
Clement

How to program using labview to use a logitech joystick( for aircraft gaming) to control a flyable aerial vehicle?

I'm new to labview. appreciate if i can get some inoputs, suggestions and maybe some programme examples to help me help is much appreciated!

Hi Doyoyo
If you open Labview and go to Help > Find Examples and then type 'joystick' into the search there is an example called "Basic Input Demo.vi" to get you started.
Good Luck
NeilR

Would anyone know how to program the Labview code for the following: Recording an analog input signal for 100msec and then repeating this 100 times in order to finally have an averaged signal (waveform)?

I have added a vi, but it doesn't quite work. Would be very grateful if someone could help, thanks!
Attachments:
Average_0411041_2.vi ‏77 KB

The attached VI collects 100 ms of data and does a rolling average. Since your sub-VI were not included I created this from scratch. There are comments in the code. I hope this is what you need.
Dirk
Attachments:
rollingaverage110x100.vi ‏47 KB

How to program in LabVIEW to check if a vi exists in a *.llb file?

This should be very simple, but I cannot find a way to do it. Can somebody help? Thanks.
Ian

if you want to do this in code then go to openG.org and download the commander you will get a host of file vi's that will do what you want. it is free and will also give you plenty of vi's to do lots of other things
Joe.
"NOTHING IS EVER EASY"

Does anyone know how movies recorded with torrents convert such a way that would see them through Apple TV. Thanks in advance.

Friends! Does anyone as movies recorded with torrents broadcast via apple TV. In iTunes, they are not all copied. Maybe they can somehow transform or there is a way to bypass iTunes broadcast on TV. They are viewed on a computer in vlc player.

Ann154,
You were correct again. I deleted everything I had done to date and re-did the entire SMS backup of my 28 message conversation again and YES I was able to open it using IE-8. It looks great and it prints great and life is good! I am going to go make a donation.
Thanks again for the help. I marked this thread as answered by you.
JerryF

New and need help with keithley 2700 GPIB threw labview 2010

Hello everyone,
I have the drivers for the keithley 2700 dmm and its ok with labview idntifying the device.
but when im trying to run the "Keithley 27XX Single Measurement.vi" and take a single resistance measurment
I always get this error, (pic related)
can anyone help please?
btw, where can i start learn from zero how to program in labview in GPIB protocol (not visa) ?
thanks alot.
E.
Attachments:
Error.jpg ‏500 KB

Zerez,
Definately search the forums as I found another forum wher they tried troubleshooting a 2700 that was locking up. Unfortunately a resolution wasn't determined.
http://forums.ni.com/t5/Instrument-Control-GPIB-Serial/keithley-2700-7700-4-wire-Measurement-GPIB/td...
Can you use max to request values from the device? Using visa test panels. It should reply to the identification command if it is functioning properly.
Kyle Hartley
RIO Product Support Engineer
National Instruments

Using LabView to run VB program with parameters

Hi,
It's my first message here so I hope I am doing things correctly. I tried to do some research before asking and I found a lot of good informations but right now, I seem to be stuck.
I am quite new to LabView, I did few VIs here and there but nothing really "serious". I am currently working on a LabView interface that deals with VB, Excel macros and Data extraction from Text file.
The VB program is in charge of a motor position, then, some Excel macros are used to do some measurement and the results are written in a text file that I use to plot some graphs.
The VB program I made give the window I put in the picture in the attached files. Basically, you have to enter some values in those TextBox then click on Move and the motor will move. When you click on the button Home, the motor moves back to the position "0", no need of the two TextBox. In my labview interface, I created two ComboBox that contain all the possible values for both of the TextBox of my VB program. What I would like to do, when I click on my "Measure" button on LabView that initiates the VB program, is that it can fill the two TextBox from VB with the data entered in my LabView ComboBox and then run the program, simulating a "click" on the Move button.
Right now, I found a VI (included in the attached files) that runs my VB program from LabView (I use it as a Sub-VI) but I still have to manually put the values in my VB program. My goal would be that when I click on my LabView button to start my measure, the motor moves but the VB program doesn't show up for the user to manually enter the values he wants.
I hope I was clear but if you need any clarification.
I did the the VB program myself.
I can also link the LabView interface I already created if need be.
Thanks for your help,
Baptiste
Attachments:
Moteur.png ‏5 KB
lancerEXE.vi ‏9 KB

First, thank you for your answers.
I know that I don't need to use VB or LabView. I just want for myself to be able to use LabView to manage a program in VB, one in VBA and use data from a text file. I know I could write everything in VBA and that would get the job done. The thing is I want to get away from VBA and Excel as much as I can. In the future, the plan would be to re-write my VBA program with LabView but as of now, I just want to use LabView to manage everything. I know I don't really need it but I want to learn how to do it and have something that works.
So I would like to know if there is way to do what I wish to do, running my VB program with parameters coming from LabView.
Thanks

Has anyone used an USB ASIO driver with LabVIEW ?

Anyone has already tried to use LabVIEW to get data from USB audio recording equipment (M-Audio Quattro)?
RKO

Hi,
NI-VISA 3.0 is the only driver in LabVIEW that would give you access to an USB device. You would probably use NI-VISA USB Raw mode.
To use the VISA driver you need to know in detail how the device works and how to program with USB. There isn't too much documentation, but if you are clear on those two things it should be easier to get familiar with the NI-VISA API.
You'll need the USB specification (www.usb.org). Also check the NI-VISA Programmer Reference Manual
Hope this is what you are looking for.
DiegoF
National Instruments.

How to program the simple tcp/ip connection?

I would like to know how to program in labview the simple tcp/ip connetion.
And is there some site with examples.

Luciano Kan Horiuchi wrote:
> I would like to know how to program in labview the simple tcp/ip connetion.
> And is there some site with examples.
You should probably start with the examples that ship with LabVIEW. For a good
server-to-single-client example, check out Data Client.vi and Data Server.vi
from the shipping examples, and for a good server-to-multiple-client example,
try the Date Client.vi/Date Server.vi pair instead. All of these can be found
in the following VI library:
\examples\comm\tcpex.llb
or via the Search Examples interface in LabVIEW. There are certainly
additional examples on the NI site, but there's no better place to start than
with these.
Regards,
John Lum

How to Program with Labview over GPIB BUS to measure dc&ac voltage through TDS3014 Scope driver

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