C#中的modbus Tcp协议的数据抓取和使用解析

来源：jb51　　时间：2022/7/19 19:04:36　　对本文有异议

C# modbus Tcp协议数据抓取和使用

基于Modbus tcp 协议的数据抓取，并解析，源码使用C#开发

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
namespace modbus
{
    class Program
    {
        #region 字节转换为16进制字符
        /// <summary>
        /// 字节转换为16进制字符
        /// </summary>
        /// <param name="data"></param>
        /// <returns></returns>jiang
        static string ByteToHexString(byte[] data)
        {
            string strTemp = "";
            for (int i = 2; i < data.Length; i++)
            {
                string a = Convert.ToString(data[i], 16).PadLeft(2, '0');
                strTemp = strTemp + a;
            }
            return strTemp.Substring(0, 100);
        }
        #endregion
        #region 16进制字符转换为字节
        /// <summary>
        /// 16进制字符转换为字节
        /// </summary>
        /// <param name="hs"></param>
        /// <returns></returns>
        static byte[] HexString(string hs)
        {
            hs = hs.Replace(" ", "");
            string strTemp = "";
            byte[] b = new byte[hs.Length / 2];
            for (int i = 0; i < hs.Length / 2; i++)
            {
                strTemp = hs.Substring(i * 2, 2);
                b[i] = Convert.ToByte(strTemp, 16);
            }
            return b;
        }
        #endregion
        #region 发送、接收报文并返回报文
        /// <summary>
        /// 發送或接受風機指令
        /// </summary>
        /// <param name="sendCodeMeg">指令</param>
        /// <param name="IpAddress">IP地址</param>
        /// <param name="panelIP">面板IP</param>
        /// <returns></returns>
        static string SendPack(string sendCodeMeg, string IpAddress, int port)
        {
            IPAddress ip = IPAddress.Parse(IpAddress);
            Socket clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            try
            {
                Console.WriteLine("開始發送數據。。。");
                clientSocket.Connect(new IPEndPoint(ip, port)); //配置服务器ip和端口
                //TcpClient tcpClient = new TcpClient(); 
                Console.WriteLine("服务器连接成功");
            }
            catch
            {
                Console.WriteLine("连接服务器失败\n");
                return null;
            }
            try
            {
                string sendMessage = sendCodeMeg; // "6B 00 00 00 00 06 02 06 05 10 00 01"; //发送到服务端的内容
                var sendData = HexString(sendMessage);
                string recvStr = null;
                int bytes;
                try
                {
                    Console.WriteLine("发送报文：{0}", sendMessage);
                    clientSocket.Send(sendData);//向服务器发送数据 
                    byte[] recvBytes = new byte[1024];
                    //连接时长500ms
                    clientSocket.ReceiveTimeout = 5000;
                    bytes = clientSocket.Receive(recvBytes, recvBytes.Length, 0); //服务端接受返回信息
                    recvStr += ByteToHexString(recvBytes);
                }
                catch (Exception ex)
                {
                    Console.WriteLine("出现错误！\n{0}\n\n", ex);
                    recvStr = null;
                }
                if (recvStr != null)
                {
                    Console.WriteLine("获取成功！\n 获得数据:{0}\n\n", recvStr);
                }
                clientSocket.Close();//关闭连接释放资源
                                     //Console.ReadLine();
                return recvStr;
            }
            catch
            {
                Console.WriteLine("出现错误！\n");
                return null;
            }
        }
        #endregion
        //主函数
        static void Main(string[] args)
        {
            Console.WriteLine("开始！");
            string IP = "10.139.49.61";
            int port = 502;
            int fnu = 4;
            string a = fnu.ToString("x2");
            string sendCodeMeg1 = "02 00 00 00 00 06 01 03 01 10 00 02";
            string sendCodeMeg2 = "03 00 00 00 00 06 01 03 01 0A 00 02";
            string data1 = null;
            string data2 = null;
            for (int num = 0; num < 5; num++)
            {
                Console.WriteLine("第{0}次调用Get_Fan函数！\n", num + 1);
                data1 = SendPack(sendCodeMeg1, IP, port);
                if (data1 != null)
                {
                    break;
                }
            }
            for (int num = 0; num < 5; num++)
            {
                Console.WriteLine("第{0}次调用Get_Fan函数！\n", num + 1);
                data2 = SendPack(sendCodeMeg2, IP, port);
                if (data2 != null)
                {
                    break;
                }
            }
            Console.WriteLine("结束");
            Console.ReadKey();
        }
    }
}

C# modbus tcp读写数据

1.引用-添加引用-HslCommunication.dll

2.ModBus组件所有的功能类都在 HslCommunication.ModBus命名空间，所以再使用之前先添加

using HslCommunication.ModBus;
using HslCommunication;

3.在使用读写功能之前必须先进行实例化：

private ModbusTcpNet busTcpClient = new ModbusTcpNet("192.168.3.45", 502, 0x01);   // 站号1

上面的实例化指定了服务器的IP地址，端口号（一般都是502），以及自己的站号，允许设置为0-255，后面的两个参数有默认值，在实例化的时候可以省略。

private ModbusTcpNet busTcpClient = new ModbusTcpNet("192.168.3.45");   // 端口号502，站号1

模拟器模拟的是西门子PLC 有四种类型
地址以0开头的是可读可写线圈
地址以1开头的是只读线圈
地址以4开头的是可读可写寄存器(string/float/int/ushort/short等都可以放在这里面)
地址以3开头的是只读寄存器
我们读取的时候只看后四位0001，就是1，但是库里面是从0开始读的，所以对应的就要减一

5.读取寄存器的一个值

        private void button1_Click(object sender, EventArgs e)
        {
		    bool coil100 = busTcpClient.ReadCoil("0").Content;   // 读取线圈1的通断
		    int int100 = busTcpClient.ReadInt32("0").Content;      // 读取寄存器1-2的int值
		    float float100 = busTcpClient.ReadFloat("0").Content; // 读取寄存器1-2的float值
		    double double100 = busTcpClient.ReadDouble("0").Content; // 读取寄存器1-3的double值
        }

6.读取寄存器的一组值（一组线圈）（一组float值）

        private void button3_Click(object sender, EventArgs e)
        {
            //读取地址为0，长度为3的线圈数量
            OperateResult<bool[]> read = busTcpClient.ReadCoil("0", 3);
            if (read.IsSuccess)
            {
                for (int i = 0; i < read.Content.Length; i++)
                {
                    Console.WriteLine(read.Content[i]);
                }
            }
            else
            {
                MessageBox.Show(read.ToMessageShowString());
            }
			
           	//读取(一组)寄存器数据
            OperateResult<float[]> result = busTcpClient.ReadFloat("0", 4);
            if (result.IsSuccess)
            {
                //Console.WriteLine(result.Content[0]);
                //Console.WriteLine(result.Content[1]);
                //Console.WriteLine(result.Content[2]);
                for (int i = 0; i < result.Content.Length; i++)
                {
                    Console.WriteLine(result.Content[i]);
                }
            }
            else
            {
                MessageBox.Show(result.ToMessageShowString());
            }
        }

7.写入一个(线圈)（寄存器）

        private void button2_Click(object sender, EventArgs e)
        {
		    busTcpClient.WriteCoil("0", true);// 写入线圈1为通
		    busTcpClient.Write("0", 123.456);// 写入寄存器1-2为123.456
        }

8.批量写入一组(线圈)（寄存器）

        private void button9_Click(object sender, EventArgs e)
        {
            //写入一组线圈
            bool[] value = new bool[] { true, true, false, true, false };
            busTcpClient.WriteCoil("0", value);
        }
        private void button10_Click(object sender, EventArgs e)
        {
            //写入一组寄存器
            float[] value = new float[] {1.1F, 1.2F, 1.3F, 1.4F, 1.5F };
            busTcpClient.Write("0", value);
        }