c#-IModbus-ReadCoilsAsync-代码实验

Modbus串口通信：获取状态并解析 coils 数据

最新推荐文章于 2023-08-11 08:37:04 发布

原创最新推荐文章于 2023-08-11 08:37:04 发布 · 653 阅读

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此篇博客展示了如何使用Modbus Serial Master通过COM1串口与设备交互，实现对1号地址的 coils 状态读取，并处理可能出现的异常。重点在于Rtu模式的设置和异步读取操作。

using Modbus.Device;
using System;
using System.Collections.Generic;
using System.IO.Ports;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
using System.Threading;

namespace ConsoleApp17
{
    class Program
    {
        static void Main(string[] args)
        {
            main();
            Console.ReadKey();
        }

        static private void main() {
            SerialPort port = new SerialPort("COM1");
            port.BaudRate = 9600;
            port.BaudRate = 9600;
            port.DataBits = 8;
            port.Parity = Parity.Odd;
            port.StopBits = StopBits.One;
            port.Open();
            var master = ModbusSerialMaster.CreateRtu(port);
            master.Transport.ReadTimeout = 20000;
            AcquireStatus(master);
            
        }
        static private async void AcquireStatus(ModbusSerialMaster master)
        {
            byte slaveID = 3;

            ushort address = 1;
            bool[] coils = null;
            master.Transport.ReadTimeout = 2000;
            try {
                new Task(test4).Start();
                coils = await master.ReadCoilsAsync(slaveID, address, 1);
                
            }
            catch (Exception ex)
            {
                Console.WriteLine("your value " + "无返回值");
            }

            if (coils != null)
            {
                Console.WriteLine("your value " + coils[0]);
            }
        }
    }
}