App.xaml.cs

@@ -11,7 +11,7 @@ namespace MembranePoreTester
         public static IPlcService PlcService { get; private set; }
         public static PlcConfiguration PlcConfig { get; private set; }
 
-        protected override void OnStartup(StartupEventArgs e)
+        protected async override void OnStartup(StartupEventArgs e)
         {
             base.OnStartup(e);
 
@@ -29,6 +29,16 @@ namespace MembranePoreTester
                 throw new InvalidOperationException("PLC settings missing in appsettings.json");
 
             PlcService = new ModbusTcpPlcService(PlcConfig);
+
+            var plcService = App.PlcService as ModbusTcpPlcService;
+            try
+            {
+                await plcService.EnsureConnectedAsync();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show($"PLC 连接失败：{ex.Message}");
+            }
         }
 
         protected override void OnExit(ExitEventArgs e)