Mitsubishi Electric FR-A820-00046 (0.4K), Инструкция по эксплуатации

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(N) Operation via communication and its settings Parameters
5 - 646
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Program example: To switch to the Network operation mode
Microsoft

Visual C++

(Ver.6.0) programming example
#include <stdio.h>
#include <windows.h>
void main(void){
HANDLE hCom; // Communication handle
DCB hDcb; // Structure for setting communication settings
COMMTIMEOUTS hTim; // Structure for setting timeouts
char szTx[0x10]; // Send buffer
char szRx[0x10]; // Receive buffer
char szCommand[0x10];// Command
int nTx,nRx; // For storing buffer size
int nSum; // For calculating sum code
BOOL bRet;
int nRet;
int i;
//**** Open COM1 port ****
hCom = CreateFile("COM1", (GENERIC_READ | GENERIC_WRITE), 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if(hCom != NULL) {
//****Set COM1 port communication ****
GetCommState(hCom,&hDcb);
// Get current communication information
hDcb.DCBlength = sizeof(DCB); // Structure size setting
hDcb.BaudRate = 19200; // Communication speed = 19200 bps
hDcb.ByteSize = 8; // Data length = 8 bits
hDcb.Parity = 2; // Parity check at even numbers
hDcb.StopBits = 2; // Stop bit = 2 bits
bRet = SetCommState(hCom,&hDcb); // Setting of changed communication information
if(bRet == TRUE) {
//**** Set COM1 port timeout ****
GetCommTimeouts(hCom,&hTim);
// Get current timeout values
hTim.WriteTotalTimeoutConstant = 1000; // Write timeout 1 second
hTim.ReadTotalTimeoutConstant = 1000; // Read timeout 1 second
hTim.ReadTotalTimeoutConstantSetCommTimeouts(hCom,&hTim); // Setting of changed timeout values
//**** Setting of command for switching the station number 1 inverter to the Network operation mode ****
sprintf(szCommand,"01FB10000");
// Send data (NET operation write)
nTx = strlen(szCommand); // Send data size
//**** Generate sum code ****
nSum = 0;
// Initialize sum data
for(i = 0;i < nTx;i++) {
nSum += szCommand[i]; // Calculate sum code
nSum &= (0xff ); // Mask data
}
//**** Generate send data ****
memset(szTx,0,sizeof(szTx));
// Initialize send buffer
memset(szRx,0,sizeof(szRx)); // Initialize receive buffer
sprintf(szTx,"\5%s%02X",szCommand,nSum);// ENQ code + send data + sum code
nTx = 1 + nTx + 2;
// ENQ code + number of send data + number of sum codes
nRet = WriteFile(hCom,szTx,nTx,&nTx,NULL);
//**** Send ****
if(nRet != 0) {
nRet = ReadFile(hCom,szRx,sizeof(szRx),&nRx,NULL);
//**** Receive ****
if(nRet != 0) {
//**** Display receive data ****
for(i = 0;i < nRx;i++) {
printf("%02X ",(BYTE)szRx[i]); // Output received data to console
// Display ASCII code in Hexadecimal' In case of 0', "30" is displayed.
}
printf("\n\r");
}
}
}
CloseHandle(hCom);
// Close communication port
}
}