YASKAWA MP3000 Series - Page 369

2.13 Communications with a Windows PC (Visual C++ Application)
Using Automatic Reception with the MP3000 as a Slave
2-351
Ethernet Communications
rc = -3;
return( rc );
}
}
return(rc);
}
/∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗/
/∗ Send command data, receive response data ∗/
/∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗/
int memobus_msg( unsigned short trans_prt, char∗ sbuf, char∗ rbuf )
{
int rc;
if( trans_prt == TCP_PRT)
{
rc = tcp_msg(sbuf, rbuf);
}
else
{
rc = udp_msg(sbuf, rbuf);
}
return(rc);
}
/∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗/
/∗ Send command data, receive response data (TCP) ∗/
/∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗∗/
int tcp_msg( char∗ sbuf, char∗ rbuf )
{
int slen, rlen;
int rc = 0;
// Send command data
slen = send( sd, sbuf, DATAi, 0 );
if ( slen != DATAi ) // Returns the number of bytes sent if sending was successful
{
closesocket(sd);
rc = -1;
return ( rc );
}
// Receive response data
rlen = recv( sd, rbuf, DATA_SIZE, 0 );
if ( rlen <= 0 ) //A 0 or less value is returned if receiving failed
{
closesocket(sd);