PC与西门子PLC串口通信

【实例截图】

【核心代码】

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        Brush bush2 = new SolidBrush(Color.Green);
        Brush bush1= new SolidBrush(Color.Red);
        int bz = 0;
        string data;
      string data2;
        public Form1()
        {
            InitializeComponent();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            Graphics g1 = this.pictureBox1.CreateGraphics();
            Graphics g2 = this.pictureBox2.CreateGraphics();
            Graphics g3 = this.pictureBox3.CreateGraphics();
            Graphics g4 = this.pictureBox4.CreateGraphics();
            Graphics g5 = this.pictureBox5.CreateGraphics();
            Graphics g6 = this.pictureBox6.CreateGraphics();
            Graphics g7 = this.pictureBox7.CreateGraphics();
            Graphics g8 = this.pictureBox8.CreateGraphics();
            if (bz == 1)
            {
                byte[] dataa = { 0x68, 0x1B, 0x1B, 0x68, 0x02, 0x00, 0x6C, 0x32, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0E, 0x00, 0x00, 0x04, 0x01, 0x12, 0x0A, 0x10, 0x02, 0x00, 0x01, 0x00, 0x00, 0x81, 0x00, 0x00, 0x00, 0x64, 0x0016 };//发送指定的16进制字节数组
               // string str = Convert.ToBase64String(dataa);
                serialPort1.Write(dataa, 0, dataa.Length);
               // textBox1.Text = str;
            }
            if (bz == 2)
            {
                byte[] b =new byte[2];
               serialPort1 .Read (b,0,2);
              //  byte[] b = System.Text.Encoding.Unicode.GetBytes(data);
                 string ss = (b[0]).ToString();
            if(ss=="229")
                {
                string temp = "1002005C5E16";
                string outdataall = "";
                for (int i = 0; i < (temp.Length / 2); i  )
                {
                    float cc = Convert.ToInt32((temp.Substring((i * 2), 2)), 16);
                    char s = (char)cc;
                    outdataall = outdataall   s.ToString();
                     }
                serialPort1.Write(outdataall);
              
                } 
            }
            if (bz == 3)
            {
                byte[] bb = new byte[29];
                 serialPort1.Read(bb, 0, 29);
               
                
                 string xx = Convert.ToString(bb[25], 2); //十进制转二进制
                  while (xx.Length < 8) xx= "0"   xx;
                 
                //画图
                if (xx.Substring(7, 1) == "1")//1指示灯为绿色
                    g1.FillEllipse(bush1, 0, 0, 30, 30);
                else
                    g1.FillEllipse(bush2, 0, 0, 30, 30);
                if (xx.Substring(6, 1) == "1")//1指示灯为绿色
                    g2.FillEllipse(bush1, 0, 0, 30, 30);
                else
                    g2.FillEllipse(bush2, 0, 0, 30, 30);
                if (xx.Substring(5, 1) == "1")//1指示灯为绿色
                    g3.FillEllipse(bush1, 0, 0, 30, 30);
                else
                    g3.FillEllipse(bush2, 0, 0, 30, 30);
                if (xx.Substring(4, 1) == "1")//1指示灯为绿色
                    g4.FillEllipse(bush1, 0, 0, 30, 30);
                else
                    g4.FillEllipse(bush2, 0, 0, 30, 30);
                if (xx.Substring(3, 1) == "1")//1指示灯为绿色
                    g5.FillEllipse(bush1, 0, 0, 30, 30);
                else
                    g5.FillEllipse(bush2, 0, 0, 30, 30);
                if (xx.Substring(2, 1) == "1")//1指示灯为绿色
                    g6.FillEllipse(bush1, 0, 0, 30, 30);
                else
                    g6.FillEllipse(bush2, 0, 0, 30, 30);
                if (xx.Substring(1, 1) == "1")//1指示灯为绿色
                    g7.FillEllipse(bush1, 0, 0, 30, 30);
                else
                    g7.FillEllipse(bush2, 0, 0, 30, 30);
                if (xx.Substring(0, 1) == "1")//1指示灯为绿色
                    g8.FillEllipse(bush1, 0, 0, 30, 30);
                else
                    g8.FillEllipse(bush2, 0, 0, 30, 30);

                bz = 0;
            }
            bz = bz   1;
            
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            serialPort1.Open();
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (serialPort1.IsOpen) serialPort1.Close();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Close();
        }
    }
}