KEPCO BOP-MG, Operator'S Manual

Page: 109 / 194

BOP HIPWR 031912
3-45
FIGURE 3-16. PROGRAMMING EXAMPLE TO VERIFY PREVIOUS COMMAND HAS COMPLETED
3.5.3 REMOTE MODE SETUP
When either of the two interface ports are in use, PAR’s 3.5.3.1 (GPIB), 3.5.3.2 and (RS 232)
describe how to configure the port to meet the user’s requirements.
The BOP can be substituted for a standard BOP that is currently being used with one of Kepco’s
BIT cards, however there are differences in operation (see PAR. 3.5.3.4 and 3.5.3.5.
The
SYSTem:SET
and
SYSTem:LANGuage
commands can be used to configure the BOP to
operate in a manner similar to earlier models of Kepco’s 100W, 200W and 400W BOP power
supplies.
#include <formatio.h>
#include <utility.h>
#include <gpib.h>
#include <ansi_c.h>
/*Overhead for the use of a NATIONAL INSTRUMENTS gpib interface */
int unit_desc;
// handle for the national instruments controller
int GPIbus=0; // GPIB card 0
int adr=6; // Power Supply address
char status_byte; // status byte from the power supply
#define MAV 0x10 /* bit 4 of the status byte is the Message AVailable bit by 488.2 specification */
/* Function Send_with_wait
INPUT: string to be sent to power supply
Description: adds the *OPC? query and performs serial polls to wait for the command to be completed.
*/
int Send_with_wait(char *command);
char snd[501];
// data to be sent to the power supply
char rcv [10]; // data from power supply
int j;
sprintf(snd,”%s;:*OPC?,command); // Add *OPC? to the command
// so there is a response from the
// power supply
Send(GPIbus, adr, snd, strlen(snd), 2); // Send the data to the power supply
for (j=0;j<500;j++)( // loop until ready (5 seconds max)
Delay(.05); // Wait for command to complete
ibrsp(unit_desc,&status_byte); // get status byte
if ((status_byte& 0x10) ==0x10) break;) // by looking for data in string
Receive (GPIbus, adr, rev, rev_buf_size,10); // so the error queue will not receive a 410 error
}
main( // test code to show operation of function.
unit_desc=ibdev(GPIbus,adr,adr/256,T100ms,1,0x40a);Delay(.005);
Send (GPIbus,adr,”VOLT 10;curr .01”,sizeof(“VOLT 10;curr .01”),NLEND;
Send_with_wait(“*SAV 10”);
}