How to read current using labview 7.1 from Keithley 2400

Hi, All,
I am trying to read current out from labview 7.1. The program I wrote is attached (program.gif). But when I run this program, the error message poped out when it reach the function of GPIB write (error.gif). Can anybody help to point out what's wrong with this program?
Thanks a bunch!
Joyce
Attachments:
PROGRAM.gif ‏40 KB
ERROR.gif ‏45 KB

Hi, Dennis,
Thanks for replying. You reminded me of putting 24, which is the GPIB address of Keithley 2400, in the front panel. Now this error doesn't occur, but it failed when it's trying to scan the result.
I attached the program in this post. I attached the figure because i thought people couldn't open the code if they don't have the right version of LV.
Thanks,
Joyce
Attachments:
Keithleyreadcurrent.vi ‏63 KB

Similar Messages

How to determine current used ip address is from company wifi

Hello guys, currently doing an attendance app (ios / android) for user to check in / out (will capture location coordinate, current used IP and etc, then send back to the server). Besides will use C# web as back-end reporting.
At back-end reporting how do I determine or check the IP address being used is from company WiFi or not ?
The purpose of this is because ensure the user check in / out within the office area. On the other hand, sometimes user will outstation at client side and check in / out by using the app (ios / android).
Besides, any better ways to do this ?
Thanks

Hi loonloon,
Based on your description, your case related to ios / android app. Both of them are third-patry mobile product. I am afraid this is out of our support. Thanks for your understanding and effort.
Best regards,
kristin
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
Click
HERE to participate the survey.

How are you currently using video with marketing automation?

I manage an educational site through Brightcove called Video Marketing Academy. I would like to create a course to tackle the challenges of using video with a marketing automation platform. I’d love to know how you are currently using video with marketing automation, what your results have been, and what are some of the challenges that you are running into?
I understand some of this maybe platform specific, but I would like to understand the challenges and help from a strategy and best practice perspective.
videomarketingacademy.brightcove.com

Well you certainly hit some good ones. When it comes to marketing automation I'm always game for more flexibility with anything, for instance I would love to have more conditional options on form processing conditions, and I know that has nothing to do with video but it goes to your answer, anyway that you can give a marketer more flexibility with filters or conditions or what not the better when it comes to lead scoring, campaign options, and reporting the better.
If one could integrate Video reporting into Eloqua I think that would be cool, I know that would be very challenging because of how Eloqua reporting works, but it would make it a one stop shop which isn't bad,

How to read current line number in function module sourrce code?

Hi All,
How to read current line number in function module sourrce code?
regards,
Anuj

If you have new editor you would be able to see the line number.
Or in the Dump screen - there is a button called Debugger - click that you would be able to see the code where dump has occured.. you would be able to find the line number from there.
To get the new editor with line number , you need to change the settingsin SE38.
Regards
Vivek

Labview program to control keithley 2400 to output current using GPIB cable

as topic suggests,i would like to have a VI program to let the 2400 sourcemeter output current using labview.sorry,but i'm still new to this stuff and i direly need it by today... so please help me out... thanks a LOT!also can u brief on the connection?
Message Edited by SG_SP_OLED on 05-15-2006 12:16 PM

Below is a link that describes what an instrument driver is.
http://zone.ni.com/devzone/conceptd.nsf/webmain/119B3B705B84B041862567D90074F425?opendocument&node=D...
The instrument driver found from the Instrument Driver Network for this instrument is not maintained by National Instruments. It can be downloaded from the Keithley website. If you search the Keithley site for software drivers, they do have a LabVIEW driver that should contain an example of programming with their VIs. Otherwise, you can search for examples on the Keithley site, and they do have example programs (however, it may or may not be the functionality you are looking for).
Regards,
Missy S.
Calibration Engineer
National Instruments

Can I program using Labview without HW from NI?

I am a newbie about LV. So I ask the simple question:
Can I program using Labview without HW from NI?

You can not only program in LabVIEW without hardware from NI, but you can program without hardware period. You can also write programs for other brands of hardware. You can even program for NI hardware with other programming languages.
Get some training, and a copy of "LabVIEW for Everyone" before you get too far. These are great resources for learning LabVIEW.

I am doing one Labview project. so my project is about design a interface in labview which one collect the data from keithley 2400 via GPIB connection.

i am doing one Labview project. so my project is about design a interface in labview which one collect the data from keithley 2400 via GPIB connection. any suggestion please

Your first task should be to just be able to send commands to the instrument. Do as Dennis suggested and download the drivers for the instrument and get familiar with them. Build up small VIs that do little tasks with those drivers so you can get used to them. Then worry about your main interface.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

How to read BMP085 in LabView?

Hello,
I have a project which includes readings from barometric pressure sensor using LabView ONLY.
I searched for such component and the only one that I found with a reasonable price was the BMP085 (DataSheet_BMP085).
The problem is that I could not manage to understand how this component can be read in LabView, I found few examples in C++ but could not understand them enough to convert the code to LabView.
(Example)
My questions are:
- I have 2 ways of communication with this component:
1. RS232
2. Digital module through cDAQ (DI/O: NI_9403), which one is prefered for this purpose?
- Could anyone explain how the code should be written, or just if it's not too much of an effort to write a simple code for this application?
Thanks.

A serial port cannot be used as an I2C without some converter. Maybe there's one out there. But you might want to check out the I2C/SPI USB modules by NI. Their API is pretty easy to use as well.
USB-8451
USB-8452
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

How to configure and use labview using java

I want to configure and use labview in my application using java, please help me out with a solution how i can configure it (like providing input to labview and getting output from labview in java ).
Thanks,
ATF

Did you try a search?
Or: How Do I Integrate Java with National Instruments Software Products?

HOW to read file using ftp???

Hi to all,
I have problem with reading file using ftp connection, i want to read only 1024 bytes for one time, and i have
next code wich read this:
byte buffer[] = new byte[1024];
while( (readCount = input.read(buffer)) > 0) {
bos.write(buffer, 0, readCount);
but I dont know how to put all read data in one byte[] if i dont know length of file.
I can't do some like: byte file[] = new file[1000000];
Thanks for all sugestions!

      * Download a file from a FTP server. A FTP URL is generated with the following syntax:
     * <code>ftp://user:password@host:port/filePath;type=i</code>.
      * @param ftpServer FTP server address (incl. optional port ':portNumber').
      * @param user Optional user name to login.
      * @param pwd Optional password for <i>user</i>.
      * @param fileName Name of file to download (with optional preceeding relative path, e.g. one/two/three.txt).
      * @param destination Destination file to save.
     * @throws MalformedURLException, IOException on error.
     public void download(String ftpServer, String user, String pwd, String fileName, File destination) throws MalformedURLException, IOException {
        if (ftpServer != null && fileName != null && destination != null) {
            StringBuffer sb = new StringBuffer("ftp://");
            if (user != null && pwd != null) { //need authentication?
                sb.append(user);
                sb.append(':');
                sb.append(pwd);
                sb.append('@');
            }//else: anonymous access
            sb.append(ftpServer);
            sb.append('/');
            sb.append(fileName);
            sb.append(";type=i"); //a=ASCII mode, i=image (binary) mode, d= file directory listing
            BufferedInputStream bis = null;
            BufferedOutputStream bos = null;
            try {
                URL url = new URL(sb.toString());
                URLConnection urlc = url.openConnection();
                bis = new BufferedInputStream(urlc.getInputStream());
                bos = new BufferedOutputStream(new FileOutputStream(destination.getName()));
                int i;
                while ((i = bis.read()) != -1) { //read next byte until end of stream
                    bos.write(i);
                }//next byte
            } finally {
                if (bis != null) try { bis.close(); } catch (IOException ioe) { /* ignore*/ }
                if (bos != null) try { bos.close(); } catch (IOException ioe) { /* ignore*/ }
        }//else: input unavailable
    }//download()If you don't want to strore the data into a file, use ByteArrayOutputStream instead of a FileOutputStream.

How to Read barcode using Gige camera qith vison software

Hi ,
I have a Gige vision camera, I need to use this to read the barcode and save it in a file. Is there a way to read a barcode directly from the camera using labview vison software.Please do let me know if there is a way.
Thanks,
Ankit G
Solved!
Go to Solution.

Hi Ankit
I dont know if you have NI's Vision Builder for Automated Inspection, it has a function to do Barcode reading, it is very convenient tool to use with lot of good examples.
Kudos are welcomed
Thanks & Regards,
Kunal Raithatha.
CTD - CLAD (I wish I can take off that A, and maybe use it later to replace D :-)
Easy Tip :- "To copy an image to a VI icon, drag the image file and place it on the icon
located in the upper right corner of the front panel or block diagram" ...If you know any
more reply back.

How to read OVD using java

Hi all,
how to access OVD using Java?
Thanks,
Kumar.P

Hi,
You can just normal LDAP API codes to connect to OVD the same way you connect to other LDAP servers.
PFB sample code for connecting to OVD.
Properties props = new Properties();
try {
props.load(new FileInputStream("LdapCredentials.Properties"));
} catch (IOException e) {
// TODO
ldapurl = "ldap://hostname:390";
ldapUser = "cn=orcladmin,ou=Org12,dc=ovid,dc=com";
userPassword = "welcome1"; //"Killtheking123456";
userContext = "ou=Join1,dc=ovid,dc=com";
Now, you have to get Directory Context as shown below.
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,
"com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, ldapurl);
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, username);
env.put(Context.SECURITY_CREDENTIALS, password);
//Initialize the Directory context
DirContext dCtx = new InitialDirContext(env);
Then you can perform search operations or new user creation etc., as you wish.
Does this help?
-Mahendra.

Check how many licenses currently used - Business Objects 11

Hi there,
We are coming up against the "all your licenses are currently used" problem from time to time so we're trying to narrow down some of the possibilities..
Is there any way through the central management console to check (after a report has just been run through the RAS) how many licenses are currently used? Like I can see, how many sessions are open, how many documents are open, connections etc. but do any of these correlate to licenses?
Any help appreciated.
Thanks,
J,

Adobe Licensing Website | Serial numbers | Orders | Accounts

How do I call a LabVIEW created DLL from within Microsoft Excel (VBA)?

Hi,
I'm trying to get Microsoft Excel 2003 to call a function stored in a dll that I created using LabVIEW 7.1. The function is very simple and is called "binary_file_to_ascii". Basically it just reads a LabVIEW created binary spreadsheet file and outputs the columns as float arrays.
The function arguments are as follows:
INPUT : String that contains the path to the binary spreadsheet file
OUTPUT : Number of rows in the spreadsheet
OUTPUT : Number of columns in the spreadsheet
OUTPUT : Float array containing the elements in column 1
OUTPUT : Float array containing the elements in column 2..
OUTPUT : Float array containing the elements in column 11
However, for some reason there is something wrong with my VBA code and/or the way I created the DLL in LabVIEW because Excel crashes when it loads my DLL.
What do I need to change in my VBA code or my LabVIEW DLL build settings to fix this?
I've attached to this post a ZIP file that contains all my code and a sample binary file.
Your help with this will be much appreciated. Thanks!
Richard
P.S. Here is the VBA code I'm using:
Private Declare Function binary_file_to_ascii Lib "C:\temp\binary_file_to_ascii\binary_to_ascii.dll" _
(ByVal binaryFile As String, ByVal nrows As Long, ByVal ncols As Long, ByVal column1 As Variant, _
ByVal column2 As Variant, ByVal column3 As Variant, _
ByVal column4 As Variant, ByVal column5 As Variant, _
ByVal column6 As Variant, ByVal column7 As Variant, _
ByVal column8 As Variant, ByVal column9 As Variant, _
ByVal column10 As Variant, ByVal column11 As Variant)
Private Sub load_binary_spectra()
Dim nrows, ncols As Long
Dim col1(), col2(), col3(), col4(), col5(), col6(), _
      col7(), col8(), col9(), col10(), col11() As Variant
Dim lRetVal As Long
Dim spectra_path As String
    spectra_path = "C:\temp\binary_file_to_ascii\sample_binary_file\sample_binary_file.dat"
    lRetVal = binary_file_to_ascii(spectra_path, nrows, ncols, _
              col1(), col2(), col3(), col4(), col5(), col6(), _
              col7(), col8(), col9(), col10(), col11())
    MsgBox (spectra_path)
End Sub
Message Edited by Richard Ballantyne on 07-25-2007 02:39 PM
Message Edited by Richard Ballantyne on 07-25-2007 02:39 PM
Attachments:
binary_file_to_ascii.zip ‏192 KB

Hi,
I don't know anything about Visual Basic, but here's my guess.
When you load the DLL with this line of code
Private Declare Function binary_file_to_ascii Lib "C:\temp\binary_file_to_ascii\binary_to_ascii.dll" _
(ByVal binaryFile As String, ByVal nrows As Long, ByVal ncols As Long, ByVal column1 As Variant, _
You are defining how the parameters are sent. It seems that all are sent by value (ByVal), but in the DLL header, some of the function's
parameters are defined as pointers(see the function prototype below, look for asterisk(*))
void __stdcall binary_file_to_ascii(PStr binaryFile,
                                                long *numberOfRows,
                                                long *numberOfColumns,
                                                float column1[],
                                                float column2[],
                                                float column3[],
                                              float column4[],
                                                float column5[],
                                                float column6[],
                                                float column7[],
                                                float column8[],
                                                float column9[],
                                                float column10[],
                                                float column11[]);
Can you define in VBA that you want to use pointer instead? Maybe by using ByRef (as by reference).
Hope this helps.

How to read a continuous temperature signal from a Pyrometer via RS-232

I'm trying to read and graph a continuous signal from a Pyrofiber Lab pyrometer which is coming in through an RS-232 cable. As far as I can tell there are no device drivers for this instrument (or any other pyrometers).
If I have the pyrometer take single measurements I can get those into LabView using the Instrument I/O Assistant, but only as an ABC string reading " 'emmisivity value' 'temperature' 'corrected temperature'" and not as individual numbers or data that I can use/graph. If I have the pyrometer in High Speed Transmit mode (which is the mode I need it in), I can't read the signal at all. How can I get LabView to continuously read (and record or graph) the incoming signal? And is there some way to parse the signal when it comes in as a string with " 'time' 'emissivity' 'temperature' 'corrected temperature'"?
I'm very new to LabView (and programming in general), so any hints on a good starting point would be appreciated.
Solved!
Go to Solution.

progers - There is not a specific solution, as there is not a device driver for this device (assuming you are also using a pyrometer).
There are serial communication examples in LabVIEW, by going to Help >> Find Examples >> Hardware Input and Output >> Serial.
You will need the programmer's manual for the device to know what serial commands to use to talk to the device (see Dennis's post above).
Best Regards,
K. Anderson
Applications Engineer
National Instruments

How to read current using labview 7.1 from Keithley 2400

Similar Messages

Maybe you are looking for