rs 232 device data reading limits keithley 2400 IV with labwindows

[rakinroll]

Thanks Snowman, problem solved.

[dsappet]

rakinroll,

Can you post your solution or at least a link to whatever drivers /code you used to solve your issue? If other folks are browsing the thread with the same questions they can probably use the same solution as you. Thanks very much!

[rakinroll]

Ok,

i downloaded http://www.keithley.com/support/data?asset=16504 and http://joule.ni.com/nidu/cds/view/p/id/1196/lang/en softwares. I closed my firewall and opened Com1 for communicate with device. Parity was odd at first but i could not communicate with the device. Then i changed it to none for both of program and the device and it worked. Now i am trying to build some interfaces to control the device.

[dcl9000]

Hi!

Following C codes are the basic functions you need to write commands and read data from Keithley 2400 through RS-232 port.

There's no driver needed to be installed or download.  But be sure to use a straight through RS-232 cable as stated in the manual of Keithley 2400.

// ===========================================================================

#include <ansi_c.h>
#include <rs232.h>
#include <cvirte.h>    
#include <userint.h>
#include <utility.h>
#include <formatio.h>           /* must be after including windows.h */

int OpenKE2400(void)
{
   char message[50];
   unsigned int dev_status;
  
   dev_status = OpenComConfig (1, "COM1", 9600, 0, 8, 1, 512, 512);    // open and configure Com1 port
  
   if ( dev_status != 0 )
   {
      Fmt (message, "%s<Keithley 2400 Source Meter is not ready!");
      MessagePopup ("Device Error", message);
      return -1;
   }
   else
   {  
    return SUCCESSFUL;
   }

}

char str_buffer[120], set_state_cmd[50];
double IV[5];

Fmt(set_state_cmd, "%s<:READ?\n");
ComWrt (1, set_state_cmd, strlen(set_state_cmd));  // command KE2400 to take a measurement
ComRdTerm (1, str_buffer, 99, 10);                          // read results from source meter
Scan(str_buffer, "%s>%s[dt#]%5f[x]", &IV);             // save results in an double array

//=================================================================================

[rakinroll]

Excellent! Thank you very much dcl9000.