YASKAWA MP920 - Sample Programs for Slave Station; TCP (When Using Extended MEMOBUS Protocol

C.2 Sample Programs for Slave Station
C-9
C
C.2 Sample Programs for Slave Station
C.2.1 TCP (When Using Extended MEMOBUS Protocol)
#include <stdio.h>
#include <winsock.h>
#include <winioctl.h>
int sd;
// Socket to wait for connection
int new_sd;
// Socket for communication after connected
struct sockaddr_in my;
// Work to store local IP address and port number
struct sockaddr_in dst;
// Work to store the remote IP address and port number
char sbuf[2048];
// Send buffer
char rbuf[2048];
// Receive buffer
#define MY_IP 0xC0A8010A
// Local IP address: 192.168.1.10
#define MY_PORT 8000
// Local port number: 8000
void main_tcp_Srv(void);
void mk_rsp_data(int*);
int chk_cmd_data(int);
void main_tcp_Srv(void)
{
WSADATAwsadata;
int rc, slen, rlen, send_len, client_addrlen;
// Declaration to use Winsock.dll (Always required at first.)
rc = WSAStartup( 0x0101, &wsadata );
if ( rc != 0 )
{
exit(0);
}
// Clears the sockaddr structure (IP address, port number, etc.) to zero.
memset( (char *)&my, 0, sizeof(struct sockaddr));
memset( (char *)&dst, 0, sizeof(struct sockaddr));
// Declaration of local IP address and port number
my.sin_family = AF_INET;
my.sin_addr.s_addr = htonl( MY_IP );
my.sin_port = htons( MY_PORT );
// Creates TCP socket.
sd = socket( AF_INET, SOCK_STREAM, 0 );
if ( sd <= 0 )
// A value 0 or less will be returned if an error occurs in processing.
Ethernet
CN1
PORT
MP920 (Master)
Personal computer (Slave)
IP address: Depends on the Slave (remote) setting.
Port number: Depends on the Slave (remote) setting.
IP address: 192. 168. 1. 10.
Port number: 8000
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Configuration and Setting Example
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