K
@Martin-Kudláček :
Of course. Here you are. I set the registers and am measuring the AO port during the sleep() cycle.
#include "header.h"
#include "vars.h"
void main(int argc, char* argv[])
{
modbus_t *modbusglob;
union {
uint16_t word[2];
uint32_t dword;
float fl;
} counter,direct;
int n[9],mode;
/********************************* Function **********************************/
void fieldbus_free(modbus_t *modbus)
{
if (modbus != NULL) {
modbus_close(modbus);
modbus_free(modbus);
}
}
/********************************* Function **********************************/
modbus_t * fieldbus_new(void)
{
int err;
modbus_t *modbus;
char host[15];
int port;
strcpy(host,"127.0.0.1");
port = 502;
modbus = modbus_new_tcp(host, port);
if (modbus == NULL )
{
fieldbus_free(modbus);
exit (55);
}
err = modbus_connect(modbus);
if (err == -1)
{
fieldbus_free(modbus);
modbus = NULL;
exit (55);
};
err=modbus_set_slave(modbus, 0);
if( err == -1)
{
fieldbus_free(modbus);
modbus = NULL;
exit (60);
} else {
return modbus;
}
}
/********************************* Function **********************************/
int setvoltage(float wish)
{
int errlvl;
union {
uint16_t word[2];
uint32_t dword;
float fl;
} wert;
uint16_t ao;
wert.fl=wish;
errlvl=modbus_write_registers(modbusglob, 3000, 2, (&wert.word[0]));
if (errlvl == -1) {printf("ERR1 modbus_write_register, %s\n",modbus_strerror(errno));}
else { printf("Register set to %f\n",wert.fl);}
return errlvl;
}
modbusglob=fieldbus_new();
mode=1;
setvoltage(1.3);
sleep(60);
setvoltage(3.5);
sleep(60);
setvoltage(5.7);
sleep(60);
setvoltage(7.9);
sleep(60);
setvoltage(10.0);
sleep(60);
setvoltage(0);
sleep(60);
setvoltage(5.0);
fieldbus_free(modbusglob);
exit (0);
}
