KEPCO MAT 1/3 Rack - Manual (Page 38)

MAT 1/3 RACK/112404 3-7
3.6.2.1 SCPI PROGRAM EXAMPLE
Figure 3-4 is an example of a program using SCPI commands to program the MAT Power Sup-
ply. The program illustrated is for a configuration using an IBM PC or compatible with a National
Instruments GPIB interface card. (It will be necessary to consult the manufacturer’s data to
achieve comparable functions with an interface card from a different manufacturer.) This pro-
gram sets output voltage (Voltage mode) or voltage limit (Current mode) to 5V, and current limit
(Voltage mode) or output current (Current mode) to 1A, then reads the measured (actual) volt-
age and current, then prints the measurements.
FIGURE 3-4. TYPICAL EXAMPLE OF MAT POWER SUPPLY PROGRAM USING SCPI COMMANDS
/**************************************************************************/
/* Sample Program For KEPCO power supply, using National Instruments */
/* GPIB interface card and IBM PC or compatible computer */
/**************************************************************************/
#include
#include "decl.h"
char rd_str[80]; // Input buffer
char dat_str[80]; // Output buffer
int bd,adr;
main() {
adr = ibfind("DEV6"); // Open DEV6 (defined by IBCONF)
bd = ibfind ("GPIB0"); // Open GPIB card
ibsic (bd); // Send Interface Clear
ibsre(bd,1); // Set remote line true
strcpy(dat_str,"VOLT 5;CURR 1"); // Define a set command
strcat(dat_str,"\r\n"); // Append delimiter
ibwrt(adr,dat_str,strlen(dat_str)); // Send string to power supply
strcpy(dat_str,"MEAS:VOLT?;CURR?"); // Define a measure command
strcat(dat_str,"\r\n"); // Append delimiter
ibwrt(adr,dat_str,strlen(dat_str)); // Send string to power supply
strset(rd_str,'\0'); // Clear input buffer
ibrd(adr,rd_str,64); // Read result of measure
printf("received : %s\n",rd_str); // Print voltage and current
}