手动拍照增加拍照超时机制，防止死循环

Rs.Controls/CameraTemplate.cs

@@ -319,7 +319,7 @@ namespace Rs.MotionPlat
         private void LoadImage()
         {
             Stopwatch time = new Stopwatch();
-
+            time.Start();
             while (true && time.ElapsedMilliseconds < 3000)
             {
                 if (ImageProcess.manualTriggerEvent.WaitOne(100))
@@ -339,10 +339,10 @@ namespace Rs.MotionPlat
                     }
                 }
             }
-            Task.Run(() =>
+            if(time.ElapsedMilliseconds>3000)
             {
-                
-            });
+                Msg.ShowError("grab fail");
+            }
         }
 
         HObject imageReduced, partImage;