Instructions For The Program - Mitsubishi FR-A800 Instruction Manual

(N) Operation via communication and its settings
Instructions for the program
• When data from the computer has any error, the inverter does not accept that data. Hence, in the user program, always
insert a retry program for data error.
• All data communication, for example, run command or monitoring, are started when the computer gives a communication
request. The inverter does not return any data without the computer's request. Hence, design the program so that the
computer gives a data read request for monitoring, etc. as required.
• Program example: To switch to the Network operation mode
 
Microsoft Visual C++
#include <stdio.h>
#include <windows.h>
void main(void){
HANDLE hCom;
DCB hDcb;
COMMTIMEOUTS
char szTx[0x10];
char szRx[0x10];
char szCommand[0x10];// Command
int nTx,nRx;
int nSum;
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);
hDcb.DCBlength = sizeof(DCB);
hDcb.BaudRate = 19200;
hDcb.ByteSize = 8;
hDcb.Parity
hDcb.StopBits = 2;
bRet = SetCommState(hCom,&hDcb);
if(bRet == TRUE) {
// Set COM1 port timeout 
GetCommTimeouts(hCom,&hTim);
hTim.WriteTotalTimeoutConstant = 1000;
hTim.ReadTotalTimeoutConstant = 1000;
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");
nTx = strlen(szCommand);
// Generate sum code 
nSum = 0;
for(i = 0;i < nTx;i++) {
}
// Generate send data 
memset(szTx,0,sizeof(szTx));
memset(szRx,0,sizeof(szRx));
sprintf(szTx,"\5%s%02X",szCommand,nSum);// ENQ code + send data + sum code
nTx = 1 + nTx + 2;
nRet = WriteFile(hCom,szTx,nTx,&nTx,NULL);
// Send 
if(nRet != 0) {
// Receive 
}
}
CloseHandle(hCom);
}
}
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PARAMETERS
(Ver.6.0) programming example
// Communication handle
// Structure for setting communication settings
hTim; // Structure for setting timeouts
// Send buffer
// Receive buffer
// For storing buffer size
// For calculating sum code
= 2;
nSum += szCommand[i];
nSum &= (0xff);
nRet = ReadFile(hCom,szRx,sizeof(szRx),&nRx,NULL);
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");
}
// Get current communication information
// Structure size setting
// Communication speed = 19200 bps
// Data length = 8 bits
// Parity check at even numbers
// Stop bit = 2 bits
// Setting of changed communication information
// Get current timeout values
// Write timeout 1 second
// Read timeout 1 second
// Send data (NET operation write)
// Send data size
// Initialize sum data
// Calculate sum code
// Mask data
// Initialize send buffer
// Initialize receive buffer
// ENQ code + number of send data + number of sum codes
// Close communication port