利用C#与PLC通信实现设备远程控制与管理

Install-Package NModbus

using System;
using System.Net.Sockets;
using Modbus.Device;  // 引入NModbus库
 
class PlcModbusClient
{
    private ModbusTcpClient modbusTcpClient;
    private TcpClient tcpClient;
 
    public PlcModbusClient(string ipAddress, int port)
    {
        tcpClient = new TcpClient(ipAddress, port); // 与PLC建立连接
        modbusTcpClient = ModbusTcpClient.CreateTcpClient(tcpClient);
    }
 
    // 读取PLC寄存器中的数据
    public ushort[] ReadData(ushort startAddress, ushort numOfPoints)
    {
        try
        {
            // 读取PLC中的保持寄存器数据
            return modbusTcpClient.ReadHoldingRegisters(startAddress, numOfPoints);
        }
        catch (Exception ex)
        {
            Console.WriteLine("读取数据时发生错误: " + ex.Message);
            return null;
        }
    }
 
    // 关闭连接
    public void Close()
    {
        tcpClient.Close();
    }
}
 
class Program
{
    static void Main(string[] args)
    {
        string plcIpAddress = "192.168.1.100";  // PLC的IP地址
        int port = 502;  // Modbus TCP默认端口
        PlcModbusClient plcClient = new PlcModbusClient(plcIpAddress, port);
 
        // 假设我们从PLC的地址0开始读取10个寄存器的数据
        ushort[] data = plcClient.ReadData(0, 10);
 
        if (data != null)
        {
            foreach (var item in data)
            {
                Console.WriteLine("PLC数据: " + item);
            }
        }
 
        plcClient.Close();  // 关闭连接
    }
}

// 向PLC写入单个寄存器数据
public void WriteData(ushort startAddress, ushort value)
{
    try
    {
        // 写入到PLC的保持寄存器
        modbusTcpClient.WriteSingleRegister(startAddress, value);
        Console.WriteLine("数据写入成功");
    }
    catch (Exception ex)
    {
        Console.WriteLine("写入数据时发生错误: " + ex.Message);
    }
}

class DeviceControl
{
    private PlcModbusClient plcClient;
 
    public DeviceControl(string plcIpAddress, int port)
    {
        plcClient = new PlcModbusClient(plcIpAddress, port);
    }
 
    // 启动设备
    public void StartDevice()
    {
        plcClient.WriteData(0, 1);  // 假设设备启动命令为写入1到PLC的地址0
        Console.WriteLine("设备已启动");
    }
 
    // 停止设备
    public void StopDevice()
    {
        plcClient.WriteData(0, 0);  // 假设设备停止命令为写入0到PLC的地址0
        Console.WriteLine("设备已停止");
    }
}
 
class Program
{
    static void Main(string[] args)
    {
        string plcIpAddress = "192.168.1.100";  // PLC的IP地址
        int port = 502;  // Modbus TCP默认端口
 
        DeviceControl deviceControl = new DeviceControl(plcIpAddress, port);
 
        // 启动设备
        deviceControl.StartDevice();
        System.Threading.Thread.Sleep(2000);  // 等待2秒
        // 停止设备
        deviceControl.StopDevice();
    }
}

class MultiDeviceManager
{
    private List<PlcModbusClient> plcClients;
 
    public MultiDeviceManager()
    {
        plcClients = new List<PlcModbusClient>();
    }
 
    public void AddDevice(string ipAddress, int port)
    {
        plcClients.Add(new PlcModbusClient(ipAddress, port));
    }
 
    // 读取所有设备的数据
    public void ReadAllDevicesData()
    {
        foreach (var plcClient in plcClients)
        {
            var data = plcClient.ReadData(0, 10);  // 读取每个PLC的寄存器数据
            Console.WriteLine("设备数据: ");
            foreach (var item in data)
            {
                Console.WriteLine(item);
            }
        }
    }
}