写一个modbus rtu的c# winform源码

以下是一个使用C# WinForm编写Modbus RTU通信的示例源码：

using System;
using System.Windows.Forms;
using Modbus.Device;

namespace ModbusRTUExample
{
    public partial class MainForm : Form
    {
        private ModbusSerialMaster modbusMaster;

        public MainForm()
        {
            InitializeComponent();
        }

        private void MainForm_Load(object sender, EventArgs e)
        {
            // 设置串口参数
            var serialPort = new System.IO.Ports.SerialPort("COM1");
            serialPort.BaudRate = 9600;
            serialPort.DataBits = 8;
            serialPort.Parity = System.IO.Ports.Parity.None;
            serialPort.StopBits = System.IO.Ports.StopBits.One;

            // 创建Modbus主站
            modbusMaster = ModbusSerialMaster.CreateRtu(serialPort);

            // 打开串口
            serialPort.Open();
        }

        private void btnRead_Click(object sender, EventArgs e)
        {
            try
            {
                // 读取保持寄存器的值
                ushort startAddress = ushort.Parse(txtStartAddress.Text);
                ushort numRegisters = ushort.Parse(txtNumRegisters.Text);
                ushort\[\] values = modbusMaster.ReadHoldingRegisters(1, startAddress, numRegisters);

                // 显示读取的值
                txtResult.Text = string.Join(", ", values);
            }
            catch (Exception ex)
            {
                MessageBox.Show("读取失败：" + ex.Message);
            }
        }

        private void btnWrite_Click(object sender, EventArgs e)
        {
            try
            {
                // 写入保持寄存器的值
                ushort startAddress = ushort.Parse(txtStartAddress.Text);
                ushort\[\] values = Array.ConvertAll(txtWriteValues.Text.Split(','), ushort.Parse);
                modbusMaster.WriteMultipleRegisters(1, startAddress, values);

                MessageBox.Show("写入成功");
            }
            catch (Exception ex)
            {
                MessageBox.Show("写入失败：" + ex.Message);
            }
        }
    }
}

这个示例代码演示了如何使用ModbusSerialMaster类来实现Modbus RTU通信。在主窗体的Load事件中，我们设置了串口参数并创建了Modbus主站。在读取按钮的Click事件中，我们使用ReadHoldingRegisters方法读取保持寄存器的值，并在写入按钮的Click事件中使用WriteMultipleRegisters方法写入保持寄存器的值。请根据实际情况修改串口参数和寄存器地址，并在界面上添加相应的控件。
#### 引用[.reference_title]
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