Modbus TCP 连接与重连

using Modbus.Device;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
using thinger.cn.DataConvertHelper;


namespace DAL
{
    public class NmodbusTCPhelper
    {
        private TcpClient tcpClient = null;
        private ModbusIpMaster master;
        public bool Connected
        {
            get => tcpClient.Connected;
        }
        #region 打开与关闭Socket
        public bool Connect(string ip, int port, int MaxConnectTime)
        {
            try
            {
                tcpClient = new TcpClient();
                if (!tcpClient.ConnectAsync(ip, port).Wait(3000))
                {
                    //连接失败
                    throw new Exception(string.Format("客户端连接在{0}:{1}失败", ip, port));
                }
                else
                {
                    master = ModbusIpMaster.CreateIp(tcpClient);
                    // 
                    // 通讯传输参数配置:  读写超时2000ms，重试次数：3次，重试间隔：1000ms
                    master.Transport.ReadTimeout = 2000;
                    master.Transport.WriteTimeout = 2000;
                    master.Transport.Retries = 3;
                    master.Transport.WaitToRetryMilliseconds = 1000;
                    return true;
                }
            }
            catch (Exception e)
            {
                throw e;
            }

        }

        public bool Disconnect()
        {
            if (tcpClient!=null)
            {
                tcpClient.Close();
                return true;
            }
            else
            {
                return false;
            }
        }
        #endregion

        #region 读4区寄存器
        /// <summary>
        /// 
        /// </summary>
        /// <param name="iAdress">偏移量</param>
        /// <param name="iLength">寄存器个数</param>
        /// <returns></returns>
        public byte[]  ReedKeepReg(int iAdress, int iLength)
        {
            try
            {
                ushort[] des = master.ReadHoldingRegisters(Convert.ToUInt16(iAdress), Convert.ToUInt16(iLength));
                byte[] res = ByteArrayLib.GetByteArrayFromUShortArray(des,DataFormat.BADC);//ABCD,BADC,CDAB
                return res;
            }
            catch (Exception)
            {

                return null;
            }
        }
        #endregion

        #region 读取一区数据
        public byte[] ReedCoilReg(int iAdress, int iLength)
        {
            try
            {
                bool[] des = master.ReadCoils(Convert.ToUInt16(iAdress), Convert.ToUInt16(iLength));
                byte[] res = ByteArrayLib.GetByteArrayFromBoolArray(des);

                return res;
            }
            catch (Exception)
            {

                return null;
            }
        }
        #endregion

        #region 预置保持寄存器
        public bool PreSetFloatReg(int iAdress, ushort[] data)
        {
            try
            {
                master.WriteMultipleRegisters(Convert.ToUInt16(iAdress), data);
                return true;
            }
            catch (Exception)
            {

                return false;
            }

        }
        #endregion


    }
}