diff --git a/.gitignore b/.gitignore
index 05ec4f6..4690600 100644
--- a/.gitignore
+++ b/.gitignore
@@ -155,3 +155,4 @@ $RECYCLE.BIN/
 # Mac desktop service store files
 .DS_Store
 /Modbus.Net/packages
+/Modbus.Net/.vs
diff --git a/Modbus.Net/Modbus.Net.Modbus/Properties/AssemblyInfo.cs b/Modbus.Net/Modbus.Net.Modbus/Properties/AssemblyInfo.cs
index 77358cf..3d81132 100644
--- a/Modbus.Net/Modbus.Net.Modbus/Properties/AssemblyInfo.cs
+++ b/Modbus.Net/Modbus.Net.Modbus/Properties/AssemblyInfo.cs
@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 //可以指定所有这些值，也可以使用“生成号”和“修订号”的默认值，
 // 方法是按如下所示使用“*”: :
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.1.0")]
-[assembly: AssemblyFileVersion("1.1.0")]
+[assembly: AssemblyVersion("1.1.1")]
+[assembly: AssemblyFileVersion("1.1.1")]
diff --git a/Modbus.Net/Modbus.Net.Siemens/Properties/AssemblyInfo.cs b/Modbus.Net/Modbus.Net.Siemens/Properties/AssemblyInfo.cs
index 80773a8..8950a30 100644
--- a/Modbus.Net/Modbus.Net.Siemens/Properties/AssemblyInfo.cs
+++ b/Modbus.Net/Modbus.Net.Siemens/Properties/AssemblyInfo.cs
@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 //可以指定所有这些值，也可以使用“生成号”和“修订号”的默认值，
 // 方法是按如下所示使用“*”: :
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.1.0")]
-[assembly: AssemblyFileVersion("1.1.0")]
+[assembly: AssemblyVersion("1.1.1")]
+[assembly: AssemblyFileVersion("1.1.1")]
diff --git a/Modbus.Net/Modbus.Net/BaseMachine.cs b/Modbus.Net/Modbus.Net/BaseMachine.cs
index 69a6588..6a94354 100644
--- a/Modbus.Net/Modbus.Net/BaseMachine.cs
+++ b/Modbus.Net/Modbus.Net/BaseMachine.cs
@@ -22,6 +22,9 @@ namespace Modbus.Net
 
     public abstract class BaseMachine : IMachineProperty
     {
+        private int ErrorCount { get; set; } = 0;
+        private int _maxErrorCount = 3;
+
         /// <summary>
         /// 设备的Id
         /// </summary>
@@ -186,11 +189,17 @@ namespace Modbus.Net
                 }
                 //返回数据
                 if (ans.Count == 0) ans = null;
+                ErrorCount = 0;
                 return ans;
             }
             catch (Exception e)
             {
                 Console.WriteLine(ConnectionToken + " " + e.Message);
+                ErrorCount++;
+                if (ErrorCount >= _maxErrorCount)
+                {
+                    Disconnect();
+                }
                 return null;
             }
         }
diff --git a/Modbus.Net/Modbus.Net/ModBus.Net.nuspec b/Modbus.Net/Modbus.Net/ModBus.Net.nuspec
index 63ec49f..63a0837 100644
--- a/Modbus.Net/Modbus.Net/ModBus.Net.nuspec
+++ b/Modbus.Net/Modbus.Net/ModBus.Net.nuspec
@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2011/08/nuspec.xsd">
     <metadata>
         <id>Modbus.Net</id>
-        <version>1.1.0</version>
+        <version>1.1.1</version>
         <title>Modbus.Net</title>
         <authors>Chris L.(Luo Sheng)</authors>
         <owners>Hangzhou Delian Information and Science Technology Co.,Ltd.</owners>
diff --git a/Modbus.Net/Modbus.Net/Properties/AssemblyInfo.cs b/Modbus.Net/Modbus.Net/Properties/AssemblyInfo.cs
index e94cc1c..c9b0f81 100644
--- a/Modbus.Net/Modbus.Net/Properties/AssemblyInfo.cs
+++ b/Modbus.Net/Modbus.Net/Properties/AssemblyInfo.cs
@@ -35,5 +35,5 @@ using System.Runtime.InteropServices;
 // 方法是按如下所示使用“*”: 
 // [assembly: AssemblyVersion("1.0.*")]
 
-[assembly: AssemblyVersion("1.1.0")]
-[assembly: AssemblyFileVersion("1.1.0")]
\ No newline at end of file
+[assembly: AssemblyVersion("1.1.1")]
+[assembly: AssemblyFileVersion("1.1.1")]
\ No newline at end of file