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討論區列表 >> C# >> FX5U SLMP通訊

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FX5U SLMP通訊
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各位好
我目前在測試C#對FX5U SLMP通訊
但是我目前遇到我對FX5U下命令時需要下五次以上才會有反應
不過這個問題軟體開啟的第一次是不會的
想請問各為我的程式部分是否有哪裡不妥,在麻煩各位了!!

我主要為兩個Function一個為建立連接另一個為對PLC下命令

public int ConnToQcpu(string ip)
        {
            try
            {
                IPAddress ipaddr = IPAddress.Parse(ip);
                tcpClient.Connect(ip, port);
                tcpClient.NoDelay = true;
                tcpClient.SendBufferSize = 8192;
                netStream = tcpClient.GetStream();
                br = new BinaryReader(netStream);
                bw = new BinaryWriter(netStream);
                return 0;
            }
            catch (Exception ex) { return -1; }
        }
        public int QWord(string method, string name, uint address, int value, ref int feedback)
        {
            retrytimes = 0;
            int[] bytetoword = { 0, 0 };
            byte[] commands = { };
            byte[] rlength = { 0x0C, 0x00, 0x00, 0x00 };
            byte[] wlength = { 0x0E, 0x00, 0x00, 0x00 };
            byte[] read = { 0x01, 0x04, 0x00, 0x00 };
            byte[] write = { 0x01, 0x14, 0x00, 0x00 };
            byte[] Address = convertAddress(address);
            byte[] numof = { 0x01, 0x00 };
            byte[] wvalue = convertWvalue(value);
            byte[] wname = { 0x00 };
            switch (name)
            {
                case "D":
                    wname[0] = 0xA8;
                    break;
                case "W":
                    wname[0] = 0xB4;
                    break;
            }
            if (method == "W")
            {
                label:
                if (retrytimes == 8) { return -9999; }
                commands = head.Concat(wlength).ToArray();
                commands = commands.Concat(write).ToArray();
                commands = commands.Concat(Address).ToArray();
                commands = commands.Concat(wname).ToArray();
                commands = commands.Concat(numof).ToArray();
                commands = commands.Concat(wvalue).ToArray();
                Thread.Sleep(20);
                if (netStream.CanWrite)
                {
                    try
                    {
                        bw.Write(commands);
                        bw.Flush();
                    }
                    catch (Exception) { return -100; }
                }
                Thread.Sleep(1000);
                if (netStream.CanRead)
                {
                    if (netStream.DataAvailable)
                    {
                        byte[] bytes = new byte[tcpClient.ReceiveBufferSize];
                        if (bytes.Length == 0) { retrytimes++; goto label; }
                        int numBytesRead = br.Read(bytes, 0, (int)tcpClient.ReceiveBufferSize);
                        byte[] bytesRead = new byte[numBytesRead];
                        Array.Copy(bytes, bytesRead, numBytesRead);
                        if (BitConverter.ToString(bytesRead) != BitConverter.ToString(writeresponse))
                        { return -1; }
                        feedback = 0; //正常寫入回饋0
                        return 0;
                    }
                    else if (!netStream.DataAvailable)
                    {
                        Thread.Sleep(100);
                        retrytimes++; goto label;
                    }
                }
            }
        }

搜尋相關Tags的文章： [ networkstream ] , [ plc ] ,
本篇文章發表於2018-03-27 22:19

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