添加PLC断线重连机制

Infrastructure/PLC/PLCTool.cs

@@ -14,6 +14,8 @@ namespace DOAN.Infrastructure.PLC
         // 私有连接对象
         private SiemensS7Net siemensTcpNet = null;
         private readonly string plcAddress;
+        private const int ReconnectDelayMs = 5000;
+        
         public PLCTool()
         {
             plcAddress = AppSettings.GetConfig("PLCConfig:Address");
@@ -34,21 +36,77 @@ namespace DOAN.Infrastructure.PLC
                 var connect = siemensTcpNet.ConnectServer();
                 if (connect.IsSuccess)
                 {
-                    Console.WriteLine($"PLC连接成功,地址{plcAddress}");
+                    Console.WriteLine($"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] PLC连接成功,地址{plcAddress}");
                     return true;
                 }
                 else
                 {
-                    Console.WriteLine($"PLC连接失败,地址{plcAddress}: {connect.Message}");
+                    Console.WriteLine($"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] PLC连接失败,地址{plcAddress}: {connect.Message}");
                     return false;
                 }
             }
             catch (Exception e)
             {
-                Console.WriteLine($"PLC连接失败,地址{plcAddress}: {e.Message}");
+                Console.WriteLine($"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] PLC连接失败,地址{plcAddress}: {e.Message}");
                 return false;
             }
         }
+        
+        /// <summary>
+        /// 检查PLC连接状态
+        /// </summary>
+        /// <returns>连接正常返回true，否则返回false</returns>
+        public bool IsConnected()
+        {
+            try
+            {
+                // 尝试读取一个字节来检查连接状态
+                var result = siemensTcpNet.Read("VB100", 1);
+                if (!result.IsSuccess)
+                {
+                    Console.WriteLine($"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] PLC连接状态检查失败: {result.Message}");
+                }
+                return result.IsSuccess;
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine($"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] PLC连接状态检查异常: {ex.Message}");
+                return false;
+            }
+        }
+        
+        /// <summary>
+        /// 重连PLC
+        /// </summary>
+        /// <returns>重连成功返回true，失败返回false</returns>
+        public bool ReconnectPLC()
+        {
+            Console.WriteLine($"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] 尝试重新连接PLC...");
+            
+            // 先关闭现有连接
+            ConnectClose();
+            
+            // 重新创建PLC对象
+            this.siemensTcpNet = new SiemensS7Net(SiemensPLCS.S200Smart, plcAddress)
+            {
+                ConnectTimeOut = 5000
+            };            
+            
+            // 持续尝试重新连接，直到成功
+            int attempt = 0;
+            while (true)
+            {
+                attempt++;
+                if (ConnectPLC())
+                {
+                    Console.WriteLine($"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] PLC重连成功，尝试次数: {attempt}");
+                    return true;
+                }
+                
+                Console.WriteLine($"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] PLC重连失败，尝试次数: {attempt}");
+                System.Threading.Thread.Sleep(ReconnectDelayMs);
+            }
+        }
 
         /// <summary>
         /// 向PLC写入单个bit值
@@ -87,7 +145,7 @@ namespace DOAN.Infrastructure.PLC
             }
             else
             {
-                Console.WriteLine($"PLC IO 取值失败,PLC地址{plcAddress},访问地址为{addr}，地址个数为{length}");
+                Console.WriteLine($"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] PLC IO 取值失败,PLC地址{plcAddress},访问地址为{addr}，地址个数为{length}");
                 return null;
             }
         }