c#实现modbus rtu定时采集数据

以下是使用C#实现Modbus RTU定时采集数据的完整代码示例，包含定时任务、数据采集和异常处理：

csharp

复制

using System;
using System.IO.Ports;
using System.Timers;

public class ModbusRtuCollector : IDisposable
{
    private readonly SerialPort _serialPort;
    private readonly Timer _timer;
    private readonly object _portLock = new object();

    // 配置参数
    public string PortName { get; }
    public int BaudRate { get; }
    public int PollingInterval { get; set; } = 1000; // 默认1秒采集间隔

    public ModbusRtuCollector(string portName, int baudRate)
    {
        PortName = portName;
        BaudRate = baudRate;
        
        // 初始化串口
        _serialPort = new SerialPort(portName, baudRate, Parity.None, 8, StopBits.One)
        {
            ReadTimeout = 500,
            WriteTimeout = 500,
            Handshake = Handshake.RequestToSend // RTS控制收发
        };

        // 初始化定时器
        _timer = new Timer(PollingInterval);
        _timer.Elapsed += async (s, e) => await PollDataAsync();
    }

    public void Start()
    {
        if (!_serialPort.IsOpen)
        {
            _serialPort.Open();
            _timer.Start();
            Console.WriteLine($"已启动数据采集，端口：{PortName}");
        }
    }

    public void Stop()
    {
        _timer.Stop();
        if (_serialPort.IsOpen) _serialPort.Close();
        Console.WriteLine("已停止数据采集");
    }

    private async Task PollDataAsync()
    {
        try
        {
            // 示例：读取设备地址1的保持寄存器40001-40004
            var result = await ReadHoldingRegistersAsync(0x01, 0x0000, 4);
            var timestamp = DateTime.Now.ToString("HH:mm:ss.fff");
            
            Con