diff --git a/Rs.SkyLine/Commom/Ops.cs b/Rs.SkyLine/Commom/Ops.cs
index 7d97e8d..a7b7fb3 100644
--- a/Rs.SkyLine/Commom/Ops.cs
+++ b/Rs.SkyLine/Commom/Ops.cs
@@ -378,12 +378,45 @@ namespace Rs.MotionPlat.Commom
 
         public static bool IsOn(string ioName)
         {
-            return IoManager.Instance.ReadIn(ioName) == 1;
+            int num = 0;
+            short val = 0;
+            while (num<3)
+            {
+                val = IoManager.Instance.ReadIn(ioName);
+                if(val==0)
+                {
+                    num++;
+                    Thread.Sleep(20);
+                }
+                else
+                {
+                    num = 0;
+                    break;
+                }
+            }
+            return val == 1;
         }
 
         public static bool IsOff(string ioName)
         {
-            return IoManager.Instance.ReadIn(ioName) == 0;
+            int num = 0;
+            short val = 0;
+            while (num < 3)
+            {
+                val = IoManager.Instance.ReadIn(ioName);
+                if (val == 1)
+                {
+                    num++;
+                    Thread.Sleep(20);
+                }
+                else
+                {
+                    num = 0;
+                    break;
+                }
+            }
+            return val == 0;
+            //return IoManager.Instance.ReadIn(ioName) == 0;
         }
 
         public static bool IsOutOn(string ioName)