c#通過網線讀取三菱PLC數據

　　public static bool PlcWrite(int adres int count string SendData)
        {
            if (SysPlcComUse == )
                return true;

　　string s_adres = (adres + SysPlcBaseAddress)ToString(#####);
            string s_count = countToString(X)PadLeft( );

　　string hdr = FFFF;
            string s_data = AD* + s_adres + s_count + SendData;
            string n = (s_dataLengthToString(X))PadLeft( );

　　string dtfram = (hdr + n + s_data);
            byte[] msg = EncodingASCIIGetBytes(dtfram);
            plcComtxtSendText = ABC;
            ApplicationDoEvents();
            if (SysDeb != )
                return true;
            int byteSend = SockSend(msg);
            SystemTextEncoding encoding = SystemTextEncodingUTF;
            string smsg = encodingGetString(msg);

　　SystemDateTime Stime = DateTimeNow;
            TimeSpan Ctime = new TimeSpan();
            do
            {
                TimeSpan Ptime = (DateTimeNow Stime);
                if (Ptime > Ctime)
                {
                    MessageBoxShow(PLC comm time out error);
                    return false;
                }
                ApplicationDoEvents();
            } while (SockAvailable == );

　　int byteRec = SockReceive(RcvBytes);
            string rcvstr = SystemTextEncodingUTFGetString(RcvBytes);
            plcComtxtRcvText = rcvstr;
            string emsg = rcvstrSubstring( );
            if (emsg != )
            {
                plcComtxtRcvText += error code + emsg;
                MessageBoxShow(PLC comm data error + emsg);
            }

　　return true;

　　}
二讀取PLC數據
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public static bool PlcRead(int adres int count ref string ReadData)
        {
            if (SysPlcComUse == )
                return true;

　　PlcReadBusy = true;
            string s_adres = (adres + SysPlcBaseAddress)ToString(#####);
            string s_count = countToString(###);

　　string hdr = FFFF;
            string s_data = AD* + s_adres + s_count;
            string n = (s_dataLengthToString(X))PadLeft( );

　　string dtfram = (hdr + n + s_data);
            byte[] msg = EncodingASCIIGetBytes(dtfram);
            if (SysDeb != )
            {
                PlcReadBusy = false;
                return true;
            }
            int byteSend = SockSend(msg);
            SystemTextEncoding encoding = SystemTextEncodingUTF;
            string smsg = encodingGetString(msg);

　　SystemDateTime Stime = DateTimeNow;
            TimeSpan Ctime = new TimeSpan();
            do
            {
                TimeSpan Ptime = (DateTimeNow Stime);
                if (Ptime > Ctime)
                {
                    MessageBoxShow(PLC comm time out error);
                    PlcReadBusy = false;
                    return false;
                }
                ApplicationDoEvents();
            } while (SockAvailable == );

　　int byteRec = SockReceive(RcvBytes);
            ReadData = SystemTextEncodingUTFGetString(RcvBytes);
            plcComtxtRcvText = ReadData;
            string emsg = ReadDataSubstring( );
            if (emsg != )
            {
                plcComtxtRcvText += error code + emsg;
                PlcReadBusy = false;
                return false;
            }
            ReadData = ReadDataSubstring();
            PlcReadBusy = false;
            return true;
        }
    }

From:http://tw.wingwit.com/Article/program/net/201311/13889.html