diff --git a/Rs.Motion/GugaoEcat/GugaoAxis.cs b/Rs.Motion/GugaoEcat/GugaoAxis.cs
index 212387d..48fb546 100644
--- a/Rs.Motion/GugaoEcat/GugaoAxis.cs
+++ b/Rs.Motion/GugaoEcat/GugaoAxis.cs
@@ -1005,7 +1005,7 @@ namespace Rs.Motion.GugaoEcat
             {
                 return ErrorCode.Fail;
             }
-            bIsOn = (pValue >> Config.AxisId & 0x01) == 1;
+            bIsOn = (pValue >> Config.AxisId-1 & 0x01) == 1;
             return ErrorCode.Ok;
         }