康耐德C2000开关量采集

     康耐德C2000设备可配置作为客户端和服务端两种方式，本次介绍的是将其作为服务端（采用服务端的好处是采集器开关量主动推送给已建立连接的客户端，客户端只需建立一个长连接，实时监测服务端是否发送开关量数据过来）进行通信，通信方式采用TCP/IP协议，通过康耐德官方的【C2000设备管理监控工作站】进行设备的IP,port等配置即可建立通信。

客户端与服务端（C2000)通信的相关主要代码附上

1. 因为是多台设备所以采用多线程分开运作，互不干涉

   private void OpenC2000Connect()
           {
               try
               {
                   ThreadForC2000_topStitchLine = new Thread(C2000DriveFor_topStitchLine);
                   ThreadForC2000_topStitchLine.IsBackground = true;
                   ThreadForC2000_getOffLine = new Thread(C2000DriveFor_getOffLine);
                   ThreadForC2000_getOffLine.IsBackground = true;
                   ThreadForC2000_assemblyLine = new Thread(C2000DriveFor_assemblyLine);
                   ThreadForC2000_assemblyLine.IsBackground = true;
                   ThreadForC2000_topStitchLine.Start();
                   ThreadForC2000_getOffLine.Start();
                   ThreadForC2000_assemblyLine.Start();
               }
               catch
               {
                   throw;
               }
           }

2. 初始化Socket链接

    private void Initialize_topStitchLineC2000()
           {
               try
               {
                   IPAddress ip = IPAddress.Parse(C2000_topStitchLineIP);
                   var ipe = new IPEndPoint(ip, port);
                   SocketFor_topStitchLine.Connect(ipe);
                   SocketFor_topStitchLine.BeginReceive(RecieveFor_topStitchLine, 0, RecieveFor_topStitchLine.Length, SocketFlags.None, new AsyncCallback(ReceiveCallBack_topStitchLine), null);
               }
               catch
               {
                   throw;
               }
           }
     private void Initialize_getOffLineC2000()
           {
               try
               {
                   IPAddress ip = IPAddress.Parse(C2000_getOffLineIP);
                   var ipe = new IPEndPoint(ip, port);
                   SocketFor_getOffLine.Connect(ipe);
                   SocketFor_getOffLine.BeginReceive(RecieveFor_getOffLine, 0, RecieveFor_getOffLine.Length, SocketFlags.None, new AsyncCallback(ReceiveCallBack_getOffLine), null);
               }
               catch
               {
                   throw;
               }
           }
     private void Initialize_assemblyLineC2000()
           {
               try
               {
                   IPAddress ip = IPAddress.Parse(C2000_assemblyLineIP);
                   var ipe = new IPEndPoint(ip, port);
                   SocketFor_assemblyLine.Connect(ipe);
                   SocketFor_assemblyLine.BeginReceive(RecieveFor_assemblyLine, 0, RecieveFor_assemblyLine.Length, SocketFlags.None, new AsyncCallback(ReceiveCallBack_assemblyLine), null);
               }
               catch
               {
                   throw;
               }
           }

3. 异步监视服务端返回值

    private void ReceiveCallBack_topStitchLine(IAsyncResult IAR)
           {
               try
               {
                   int REnd = SocketFor_topStitchLine.EndReceive(IAR);
                   var cmd = RecieveFor_topStitchLine.ConvertToHexStringFromHexByte(REnd);
                   var state = BLL.Common.Setting.RunningState.runing;
                   if (cmd == DataSetCache.C2000_CMD.D1_runing ||
                       cmd == DataSetCache.C2000_CMD.D1D2D2_runing)
                       state = BLL.Common.Setting.RunningState.runing;
   
                   if (cmd == DataSetCache.C2000_CMD.D1D2 ||
                       cmd == DataSetCache.C2000_CMD.D1D2D1 ||
                       cmd == DataSetCache.C2000_CMD.D2)
                       state = BLL.Common.Setting.RunningState.fault;
   
                   if (cmd == DataSetCache.C2000_CMD.D1Off)
                       state = BLL.Common.Setting.RunningState.stop;
   
                   DataSetCache.Services.TopStitchInsert(state);
                   SocketFor_topStitchLine.BeginReceive(RecieveFor_topStitchLine, 0, RecieveFor_topStitchLine.Length, 0, new AsyncCallback(ReceiveCallBack_topStitchLine), null);
               }
               catch (Exception ex)
               {
                   Logger.Error(ex.Message);
               }
           }
   private void ReceiveCallBack_getOffLine(IAsyncResult IAR)
           {
               try
               {
                   int REnd = SocketFor_getOffLine.EndReceive(IAR);
                   var cmd = RecieveFor_getOffLine.ConvertToHexStringFromHexByte(REnd);
   
                   var state = BLL.Common.Setting.RunningState.runing;
                   if (cmd == DataSetCache.C2000_CMD.D1_runing ||
                       cmd == DataSetCache.C2000_CMD.D1D2D2_runing)
                       state = BLL.Common.Setting.RunningState.runing;
   
                   if (cmd == DataSetCache.C2000_CMD.D1D2 ||
                       cmd == DataSetCache.C2000_CMD.D1D2D1 ||
                       cmd == DataSetCache.C2000_CMD.D2)
                       state = BLL.Common.Setting.RunningState.fault;
   
                   if (cmd == DataSetCache.C2000_CMD.D1Off)
                       state = BLL.Common.Setting.RunningState.stop;
   
                   DataSetCache.Services.GetOffLineInsert(state);
   
                   SocketFor_getOffLine.BeginReceive(RecieveFor_getOffLine, 0, RecieveFor_getOffLine.Length, 0, new AsyncCallback(ReceiveCallBack_getOffLine), null);
               }
               catch (Exception ex)
               {
                   Logger.Error(ex.Message);
               }
           }
   private void ReceiveCallBack_assemblyLine(IAsyncResult IAR)
           {
               try
               {
                   int REnd = SocketFor_assemblyLine.EndReceive(IAR);
                   var cmd = RecieveFor_assemblyLine.ConvertToHexStringFromHexByte(REnd);
   
                   var state = BLL.Common.Setting.RunningState.runing;
                   if (cmd == DataSetCache.C2000_CMD.D1_runing ||
                       cmd == DataSetCache.C2000_CMD.D1D2D2_runing)
                       state = BLL.Common.Setting.RunningState.runing;
   
                   if (cmd == DataSetCache.C2000_CMD.D1D2 ||
                       cmd == DataSetCache.C2000_CMD.D1D2D1 ||
                       cmd == DataSetCache.C2000_CMD.D2)
                       state = BLL.Common.Setting.RunningState.fault;
   
                   if (cmd == DataSetCache.C2000_CMD.D1Off)
                       state = BLL.Common.Setting.RunningState.stop;
   
                   DataSetCache.Services.AssemblyLineInsert(state);
   
                   SocketFor_assemblyLine.BeginReceive(RecieveFor_assemblyLine, 0, RecieveFor_assemblyLine.Length, 0, new AsyncCallback(ReceiveCallBack_assemblyLine), null);
               }
               catch (Exception ex)
               {
                   Logger.Error(ex.Message);
               }
           }

在开发客户端通信的过程中碰到几点问题，在这里把遇到的问题以及解决方案介绍下：

1. 因客户端安装在服务器上，设备安装在现场，现场下班就会断电，服务器是不会关机的，这就导致当现场断电采集器（服务端），第二天开机是，和客户端已经建立的连接客户端还记得，但是服务端已经不记得啦。客户端这个时候就很尴尬，连接不上服务端， 重连又告诉你，你已经有连接啦。怎么办？

解：

 public void C2000Drive()
        {
            while (true)
            {
                try
                {
                    if (C2000IP.PingIp())
                    {
                        if (!SocketForLine.Connected)
                            InitializeLineC2000();
                        timerC2000Line();
                    }
                    else
                    {
                        if (SocketForLine.Connected)
                        {
                            SocketForLine.Close();
                            SocketForLine = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                        } lbl_C2000Line.Image = Resources.black;
                    } Thread.Sleep(5000);
                }
                catch (Exception ex)
                {
                    Logger.Error(ex.Message);
                }
            }
        }

当服务端IP地址ping不同的时候，并且Socket连接仍然是Connected状态（不主动关闭，即使服务端断了，连接状态还是Connected，我擦，网都不通啦，还连接个啥啊）的情况下，手动关闭连接并重新实例化Socket对象（以备等明天上班再送电重连）。