添加配置连接窗口已经相关S7与ModbusTCP连接功能

DeviceCommand/Devices/UMC1300.cs

@@ -35,6 +35,15 @@ namespace DeviceCommand.Devices
             ConfigureDevice(ip, port, sendTimeoutMs, receiveTimeoutMs);
         }
 
+        public override async Task<bool> ConnectAsync(CancellationToken ct = default)
+        {
+            if (IsConnected)
+            {
+                return true;
+            }
+            return await base.ConnectAsync(ct);
+        }
+
         // ==================== 读取单个值 ====================
 
         /// <summary>读取温度 PV（工程值）</summary>