C#開放式TCP/IP與S71200PLC通訊

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 源碼：

namespace TCPIP測試
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        //創建Socket連接對象
        private Socket socketlient = null;
        //運行標志位
        private bool isRunning = false;

        private Thread thrClient;

        private byte[] setArray = new byte[100];

        private void btn_Connect_Click(object sender, EventArgs e)
        {
            socketlient = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);

            IPAddress address = IPAddress.Parse(this.txt_IP.Text.Trim());

            IPEndPoint iPEndPoint = new IPEndPoint(address, int.Parse(this.txt_Port.Text.Trim()));

            try
            {
                socketlient.Connect(iPEndPoint);
            }
            catch(Exception ex)
            {
                MessageBox.Show("連接失敗" + ex, "連接信息");
                return;
            }
            MessageBox.Show("連接成功", "連接信息");
            isRunning = true;

            //開始線程接受PLC報文
            thrClient = new Thread(ReceiveMessage);
            thrClient.IsBackground = true;
            thrClient.Start();
        }
        /// <summary>
        /// 接受和處理PLC返回的報文
        /// </summary>
        private void ReceiveMessage()
        {
            while(isRunning==true)
            { 
                //定義一個接受緩沖區
                byte[] arrMsgRcv = new byte[1024];
                int length = -1;
                try
                {
                    length = socketlient.Receive(arrMsgRcv);
                }
                catch(Exception)
                {
                    MessageBox.Show("異常");
                }
                if(length==200|| length == 1024)
                {
                    byte[] Result = GetByteArray(arrMsgRcv, 0, length);
                    setArray = GetByteArray(arrMsgRcv, 0, 100);
                    try
                    {
                        Invoke(new Action(() =>
                        {
                            this.txt_SetReadBack1.Text = BitConverter.ToSingle(GetSingleByteArray(Result, 0, 4), 0).ToString();
                            this.txt_SetReadBack2.Text = BitConverter.ToSingle(GetSingleByteArray(Result, 4, 4), 0).ToString();

                            this.txt_ActualValue1.Text = BitConverter.ToSingle(GetSingleByteArray(Result, 100, 4), 0).ToString();
                            this.txt_ActualValue2.Text = BitConverter.ToSingle(GetSingleByteArray(Result, 104, 4), 0).ToString();
                        }));
                    }
                    catch(Exception ex)
                    {
                        break;
                    }
                }
             
            }
      
        }

        private void btn_DisConnect_Click(object sender, EventArgs e)
        {
            socketlient?.Shutdown(SocketShutdown.Both);
            socketlient?.Close();
        }
        /// <summary>
        /// 自定義截取字節數組
        /// </summary>
        /// <param name="byteArray"></param>
        /// <param name="start"></param>
        /// <param name="length"></param>
        /// <returns></returns>
        private byte[] GetByteArray(byte[] byteArray,int start,int length)
        {
            byte[] resByte =new byte[length];
            if(byteArray!=null&&byteArray.Length>=length)
            {
                for(int i=0;i<length;i++)
                {
                    resByte[i] = byteArray[i + start];
                }
            }
            return resByte;
        }
        /// <summary>
        /// 四字節順序轉換 1：ABCD 2:BADC 3:CDAB 4:DCBA
        /// </summary>
        /// <param name="byteArr"></param>
        /// <param name="start"></param>
        /// <param name="type"></param>
        /// <returns></returns>
        private byte[] GetSingleByteArray(byte[] byteArr,int start,int type)
        {
            byte[] resByte = new byte[4];
            if(byteArr!=null&&byteArr.Length>4&&type>=1&&type<=4)
            {
                for(int i=0;i<4;i++)
                {
                    resByte[i] = byteArr[i + start];
                }
                byte[] resByte1 = new byte[4];
                switch(type)
                {
                    case 1:
                        resByte1 = resByte;
                        break;
                    case 2:
                        resByte1[0] = resByte[1];
                        resByte1[1] = resByte[0];
                        resByte1[2] = resByte[3];
                        resByte1[3] = resByte[2];
                        break;
                    case 3:
                        resByte1[0] = resByte[2];
                        resByte1[1] = resByte[3];
                        resByte1[2] = resByte[0];
                        resByte1[3] = resByte[1];
                        break;
                    case 4:
                        resByte1[0] = resByte[3];
                        resByte1[1] = resByte[2];
                        resByte1[2] = resByte[1];
                        resByte1[3] = resByte[0];
                        break;
                }
                return resByte1;
            }
            return resByte;

        }

        private void groupBox2_Enter(object sender, EventArgs e)
        {

        }

        private void btn_Set_Click(object sender, EventArgs e)
        {
            float f1 = Convert.ToSingle(this.txt_Set1.Text.Trim());
            float f2 = Convert.ToSingle(this.txt_Set2.Text.Trim());

            byte[] setArr1 = BitConverter.GetBytes(f1);
            byte[] setArr2 = BitConverter.GetBytes(f2);

            setArray[0] = setArr1[3];
            setArray[1] = setArr1[2];
            setArray[2] = setArr1[1];
            setArray[3] = setArr1[0];

            setArray[4] = setArr2[3];
            setArray[5] = setArr2[2];
            setArray[6] = setArr2[1];
            setArray[7] = setArr2[0];

            socketlient.Send(setArray);

        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
   
}

 

源碼連接（包括PLC程序）：

(13條消息) C#開放式TCP/IP與S71200PLC通訊-互聯網文檔類資源-CSDN文庫