diff --git a/Modbus.Net/Modbus.Net.Modbus/AddressFormaterModbus.cs b/Modbus.Net/Modbus.Net.Modbus/AddressFormaterModbus.cs
index 06a832e..ffe8813 100644
--- a/Modbus.Net/Modbus.Net.Modbus/AddressFormaterModbus.cs
+++ b/Modbus.Net/Modbus.Net.Modbus/AddressFormaterModbus.cs
@@ -1,5 +1,8 @@
 namespace Modbus.Net.Modbus
 {
+    /// <summary>
+    ///     南大奥拓NA200H专用AddressFormater
+    /// </summary>
     public class AddressFormaterNA200H : AddressFormater
     {
         public override string FormatAddress(string area, int address)
@@ -13,6 +16,9 @@
         }
     }
 
+    /// <summary>
+    ///     Modbus标准AddressFormater
+    /// </summary>
     public class AddressFormaterModbus : AddressFormater
     {
         public override string FormatAddress(string area, int address)
diff --git a/Modbus.Net/Modbus.Net.Modbus/AddressTranslatorModbus.cs b/Modbus.Net/Modbus.Net.Modbus/AddressTranslatorModbus.cs
index 29a8b00..7822cf6 100644
--- a/Modbus.Net/Modbus.Net.Modbus/AddressTranslatorModbus.cs
+++ b/Modbus.Net/Modbus.Net.Modbus/AddressTranslatorModbus.cs
@@ -4,12 +4,21 @@ using System.Linq;
 namespace Modbus.Net.Modbus
 {
     /// <summary>
-    ///     NA200H数据单元翻译器
+    ///     南大奥拓NA200H数据单元翻译器
     /// </summary>
     public class AddressTranslatorNA200H : AddressTranslator
     {
+        /// <summary>
+        ///     读功能码
+        /// </summary>
         protected Dictionary<string, AreaOutputDef> ReadFunctionCodeDictionary;
+        /// <summary>
+        ///     功能码翻译至标准Modbus地址位置
+        /// </summary>
         protected Dictionary<string, int> TransDictionary;
+        /// <summary>
+        ///     写功能码
+        /// </summary>
         protected Dictionary<string, AreaOutputDef> WriteFunctionCodeDictionary;
 
         public AddressTranslatorNA200H()
@@ -188,7 +197,13 @@ namespace Modbus.Net.Modbus
     /// </summary>
     public class AddressTranslatorModbus : AddressTranslator
     {
+        /// <summary>
+        ///     读功能码
+        /// </summary>
         protected Dictionary<string, AreaOutputDef> ReadFunctionCodeDictionary;
+        /// <summary>
+        ///     写功能码
+        /// </summary>
         protected Dictionary<string, AreaOutputDef> WriteFunctionCodeDictionary;
 
         public AddressTranslatorModbus()
diff --git a/Modbus.Net/Modbus.Net.Modbus/ModbusAsciiProtocal.cs b/Modbus.Net/Modbus.Net.Modbus/ModbusAsciiProtocal.cs
index 43f93fd..feeff00 100644
--- a/Modbus.Net/Modbus.Net.Modbus/ModbusAsciiProtocal.cs
+++ b/Modbus.Net/Modbus.Net.Modbus/ModbusAsciiProtocal.cs
@@ -1,7 +1,7 @@
 namespace Modbus.Net.Modbus
 {
     /// <summary>
-    ///     Modbus/Rtu协议
+    ///     Modbus/Ascii码协议
     /// </summary>
     public class ModbusAsciiProtocal : ModbusProtocal
     {
diff --git a/Modbus.Net/Modbus.Net.Modbus/ModbusAsciiProtocalLinker.cs b/Modbus.Net/Modbus.Net.Modbus/ModbusAsciiProtocalLinker.cs
index 5609f8f..8952917 100644
--- a/Modbus.Net/Modbus.Net.Modbus/ModbusAsciiProtocalLinker.cs
+++ b/Modbus.Net/Modbus.Net.Modbus/ModbusAsciiProtocalLinker.cs
@@ -3,6 +3,9 @@ using System.Text;
 
 namespace Modbus.Net.Modbus
 {
+    /// <summary>
+    ///     Modbus/Ascii码协议连接器
+    /// </summary>
     public class ModbusAsciiProtocalLinker : ComProtocalLinker
     {
         public ModbusAsciiProtocalLinker(string com) : base(com, 9600, Parity.None, StopBits.One, 8)
diff --git a/Modbus.Net/Modbus.Net.Modbus/ModbusMachine.cs b/Modbus.Net/Modbus.Net.Modbus/ModbusMachine.cs
index 9b41863..8fc918c 100644
--- a/Modbus.Net/Modbus.Net.Modbus/ModbusMachine.cs
+++ b/Modbus.Net/Modbus.Net.Modbus/ModbusMachine.cs
@@ -2,6 +2,9 @@
 
 namespace Modbus.Net.Modbus
 {
+    /// <summary>
+    ///     Modbus设备
+    /// </summary>
     public class ModbusMachine : BaseMachine
     {
         public ModbusMachine(ModbusType connectionType, string connectionString,
diff --git a/Modbus.Net/Modbus.Net.Modbus/ModbusProtocal.cs b/Modbus.Net/Modbus.Net.Modbus/ModbusProtocal.cs
index 71e2456..68eb5a6 100644
--- a/Modbus.Net/Modbus.Net.Modbus/ModbusProtocal.cs
+++ b/Modbus.Net/Modbus.Net.Modbus/ModbusProtocal.cs
@@ -4,6 +4,9 @@ using System.Threading.Tasks;
 
 namespace Modbus.Net.Modbus
 {
+    /// <summary>
+    ///     变量功能码
+    /// </summary>
     internal enum ModbusProtocalVariableFunctionCode : byte
     {
         ReadVariable = 20,
@@ -39,6 +42,9 @@ namespace Modbus.Net.Modbus
         WriteMultiRegister = 16
     }
 
+    /// <summary>
+    ///     Modbus协议
+    /// </summary>
     public abstract class ModbusProtocal : BaseProtocal
     {
         protected ModbusProtocal(byte slaveAddress, byte masterAddress) : base(slaveAddress, masterAddress)
diff --git a/Modbus.Net/Modbus.Net.Modbus/ModbusProtocalLinkerBytesExtend.cs b/Modbus.Net/Modbus.Net.Modbus/ModbusProtocalLinkerBytesExtend.cs
index b3c375d..1338d9f 100644
--- a/Modbus.Net/Modbus.Net.Modbus/ModbusProtocalLinkerBytesExtend.cs
+++ b/Modbus.Net/Modbus.Net.Modbus/ModbusProtocalLinkerBytesExtend.cs
@@ -57,6 +57,7 @@ namespace Modbus.Net.Modbus
     {
         public override byte[] BytesExtend(byte[] content)
         {
+            //Modbus/Ascii协议扩张，前面增加:，后面增加LRC校验和尾字符
             var newContent = new List<byte>();
             newContent.AddRange(Encoding.ASCII.GetBytes(":"));
             foreach (var number in content)
@@ -71,6 +72,7 @@ namespace Modbus.Net.Modbus
 
         public override byte[] BytesDecact(byte[] content)
         {
+            //Modbus/Ascii协议收缩，抛弃头尾。
             var newContent = new List<byte>();
             var ans = Encoding.ASCII.GetString(content);
             var index = ans.IndexOf(Environment.NewLine);
diff --git a/Modbus.Net/Modbus.Net.Modbus/ModbusRtuProtocalLinker.cs b/Modbus.Net/Modbus.Net.Modbus/ModbusRtuProtocalLinker.cs
index 3fcbdfb..a5a089d 100644
--- a/Modbus.Net/Modbus.Net.Modbus/ModbusRtuProtocalLinker.cs
+++ b/Modbus.Net/Modbus.Net.Modbus/ModbusRtuProtocalLinker.cs
@@ -2,6 +2,9 @@
 
 namespace Modbus.Net.Modbus
 {
+    /// <summary>
+    ///     Modbus/Rtu协议连接器
+    /// </summary>
     public class ModbusRtuProtocalLinker : ComProtocalLinker
     {
         public ModbusRtuProtocalLinker(string com) : base(com, 9600, Parity.None, StopBits.One, 8)
diff --git a/Modbus.Net/Modbus.Net.Modbus/ModbusTcpProtocalLinker.cs b/Modbus.Net/Modbus.Net.Modbus/ModbusTcpProtocalLinker.cs
index 9e1154d..830e564 100644
--- a/Modbus.Net/Modbus.Net.Modbus/ModbusTcpProtocalLinker.cs
+++ b/Modbus.Net/Modbus.Net.Modbus/ModbusTcpProtocalLinker.cs
@@ -1,5 +1,8 @@
 namespace Modbus.Net.Modbus
 {
+    /// <summary>
+    ///     Modbus/Tcp协议连接器
+    /// </summary>
     public class ModbusTcpProtocalLinker : TcpProtocalLinker
     {
         public ModbusTcpProtocalLinker(string ip) : base(ip, int.Parse(ConfigurationManager.ModbusPort))
diff --git a/Modbus.Net/Modbus.Net.Modbus/ModbusUtility.cs b/Modbus.Net/Modbus.Net.Modbus/ModbusUtility.cs
index 65580f4..53c4775 100644
--- a/Modbus.Net/Modbus.Net.Modbus/ModbusUtility.cs
+++ b/Modbus.Net/Modbus.Net.Modbus/ModbusUtility.cs
@@ -23,8 +23,14 @@ namespace Modbus.Net.Modbus
         Ascii = 2
     }
 
+    /// <summary>
+    ///     Modbus基础Api入口
+    /// </summary>
     public class ModbusUtility : BaseUtility
     {
+        /// <summary>
+        ///     Modbus协议类型
+        /// </summary>
         private ModbusType _modbusType;
 
         public ModbusUtility(int connectionType, byte slaveAddress, byte masterAddress)
@@ -81,6 +87,7 @@ namespace Modbus.Net.Modbus
                 _modbusType = value;
                 switch (_modbusType)
                 {
+                    //Rtu协议
                     case ModbusType.Rtu:
                     {
                         Wrapper = ConnectionString == null
@@ -88,6 +95,7 @@ namespace Modbus.Net.Modbus
                             : new ModbusRtuProtocal(ConnectionString, SlaveAddress, MasterAddress);
                         break;
                     }
+                    //Tcp协议
                     case ModbusType.Tcp:
                     {
                         Wrapper = ConnectionString == null
@@ -98,6 +106,7 @@ namespace Modbus.Net.Modbus
                                     MasterAddress));
                         break;
                     }
+                    //Ascii协议
                     case ModbusType.Ascii:
                     {
                         Wrapper = ConnectionString == null
@@ -114,6 +123,12 @@ namespace Modbus.Net.Modbus
             ModbusType = (ModbusType) connectionType;
         }
 
+        /// <summary>
+        ///     读数据
+        /// </summary>
+        /// <param name="startAddress">起始地址</param>
+        /// <param name="getByteCount">获取字节个数</param>
+        /// <returns>获取的结果</returns>
         public override async Task<byte[]> GetDatasAsync(string startAddress, int getByteCount)
         {
             try
@@ -131,6 +146,12 @@ namespace Modbus.Net.Modbus
             }
         }
 
+        /// <summary>
+        ///     写数据
+        /// </summary>
+        /// <param name="startAddress">起始地址</param>
+        /// <param name="setContents">需要设置的数据</param>
+        /// <returns>设置是否成功</returns>
         public override async Task<bool> SetDatasAsync(string startAddress, object[] setContents)
         {
             try
@@ -149,6 +170,10 @@ namespace Modbus.Net.Modbus
         }
 
         /*
+        /// <summary>
+        ///     读时间
+        /// </summary>
+        /// <returns>设备的时间</returns>
         public override DateTime GetTime()
         {
             try
@@ -165,6 +190,11 @@ namespace Modbus.Net.Modbus
             }
         }
 
+        /// <summary>
+        ///     写时间
+        /// </summary>
+        /// <param name="setTime">需要写入的时间</param>
+        /// <returns>写入是否成功</returns>
         public override bool SetTime(DateTime setTime)
         {
             try
diff --git a/Modbus.Net/Modbus.Net.Modbus/README.md b/Modbus.Net/Modbus.Net.Modbus/README.md
index a1f1617..94989db 100644
--- a/Modbus.Net/Modbus.Net.Modbus/README.md
+++ b/Modbus.Net/Modbus.Net.Modbus/README.md
@@ -1,4 +1,4 @@
-Modbus.Net
+Modbus.Net.Modbus
 ===================
 [![NuGet](https://img.shields.io/nuget/v/Modbus.Net.Modbus.svg)](https://www.nuget.org/packages/Modbus.Net.Modbus/)
 
diff --git a/Modbus.Net/Modbus.Net.OPC/AddressFormaterOpc.cs b/Modbus.Net/Modbus.Net.OPC/AddressFormaterOpc.cs
index 9bc6d1d..ea16eb8 100644
--- a/Modbus.Net/Modbus.Net.OPC/AddressFormaterOpc.cs
+++ b/Modbus.Net/Modbus.Net.OPC/AddressFormaterOpc.cs
@@ -3,8 +3,17 @@ using System.Linq;
 
 namespace Modbus.Net.OPC
 {
+    /// <summary>
+    ///     Opc地址编码器
+    /// </summary>
     public class AddressFormaterOpc : AddressFormater
     {
+        /// <summary>
+        ///     协议构造器
+        /// </summary>
+        /// <param name="tagGeter">如何通过BaseMachine和AddressUnit构造Opc的标签</param>
+        /// <param name="machine">调用这个编码器的设备</param>
+        /// <param name="seperator">每两个标签之间用什么符号隔开，默认为/</param>
         public AddressFormaterOpc(Func<BaseMachine, AddressUnit, string[]> tagGeter, BaseMachine machine,
             char seperator = '/')
         {
diff --git a/Modbus.Net/Modbus.Net.OPC/AddressTranslatorOpc.cs b/Modbus.Net/Modbus.Net.OPC/AddressTranslatorOpc.cs
index 31d8f37..71f0d20 100644
--- a/Modbus.Net/Modbus.Net.OPC/AddressTranslatorOpc.cs
+++ b/Modbus.Net/Modbus.Net.OPC/AddressTranslatorOpc.cs
@@ -2,6 +2,9 @@
 
 namespace Modbus.Net.OPC
 {
+    /// <summary>
+    ///     Opc地址解析器
+    /// </summary>
     public class AddressTranslatorOpc : AddressTranslator
     {
         public override AddressDef AddressTranslate(string address, bool isRead)
diff --git a/Modbus.Net/Modbus.Net.OPC/Modbus.Net.OPC.csproj b/Modbus.Net/Modbus.Net.OPC/Modbus.Net.OPC.csproj
index 2accc6f..71afb08 100644
--- a/Modbus.Net/Modbus.Net.OPC/Modbus.Net.OPC.csproj
+++ b/Modbus.Net/Modbus.Net.OPC/Modbus.Net.OPC.csproj
@@ -90,6 +90,7 @@
   <ItemGroup>
     <None Include="Modbus.Net.OPC.nuspec" />
     <None Include="packages.config" />
+    <None Include="README.md" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
diff --git a/Modbus.Net/Modbus.Net.OPC/OpcDaConnector.cs b/Modbus.Net/Modbus.Net.OPC/OpcDaConnector.cs
index 6cd6428..9538441 100644
--- a/Modbus.Net/Modbus.Net.OPC/OpcDaConnector.cs
+++ b/Modbus.Net/Modbus.Net.OPC/OpcDaConnector.cs
@@ -5,6 +5,9 @@ using System.Threading.Tasks;
 
 namespace Modbus.Net.OPC
 {
+    /// <summary>
+    ///     OpcDa协议连接实现
+    /// </summary>
     public class OpcDaConnector : BaseConnector
     {
         protected static Dictionary<string, OpcDaConnector> _instances = new Dictionary<string, OpcDaConnector>();
diff --git a/Modbus.Net/Modbus.Net.OPC/OpcDaMachine.cs b/Modbus.Net/Modbus.Net.OPC/OpcDaMachine.cs
index 312cf89..6f072ce 100644
--- a/Modbus.Net/Modbus.Net.OPC/OpcDaMachine.cs
+++ b/Modbus.Net/Modbus.Net.OPC/OpcDaMachine.cs
@@ -2,6 +2,9 @@
 
 namespace Modbus.Net.OPC
 {
+    /// <summary>
+    ///     OpcDa设备
+    /// </summary>
     public class OpcDaMachine : BaseMachine
     {
         public OpcDaMachine(string connectionString, IEnumerable<AddressUnit> getAddresses, bool keepConnect)
diff --git a/Modbus.Net/Modbus.Net.OPC/OpcDaProtocal.cs b/Modbus.Net/Modbus.Net.OPC/OpcDaProtocal.cs
index d73bffa..bf5ce6d 100644
--- a/Modbus.Net/Modbus.Net.OPC/OpcDaProtocal.cs
+++ b/Modbus.Net/Modbus.Net.OPC/OpcDaProtocal.cs
@@ -2,6 +2,9 @@
 
 namespace Modbus.Net.OPC
 {
+    /// <summary>
+    ///     OpcDa协议
+    /// </summary>
     public class OpcDaProtocal : OpcProtocal
     {
         private readonly string _host;
diff --git a/Modbus.Net/Modbus.Net.OPC/OpcDaProtocalLinker.cs b/Modbus.Net/Modbus.Net.OPC/OpcDaProtocalLinker.cs
index f94f735..11ec17d 100644
--- a/Modbus.Net/Modbus.Net.OPC/OpcDaProtocalLinker.cs
+++ b/Modbus.Net/Modbus.Net.OPC/OpcDaProtocalLinker.cs
@@ -2,6 +2,9 @@
 
 namespace Modbus.Net.OPC
 {
+    /// <summary>
+    /// Opc Da协议连接器
+    /// </summary>
     public class OpcDaProtocalLinker : ProtocalLinker
     {
         public OpcDaProtocalLinker() : this(ConfigurationManager.OpcDaHost)
diff --git a/Modbus.Net/Modbus.Net.OPC/OpcDaUtility.cs b/Modbus.Net/Modbus.Net.OPC/OpcDaUtility.cs
index b7d4e82..116be3f 100644
--- a/Modbus.Net/Modbus.Net.OPC/OpcDaUtility.cs
+++ b/Modbus.Net/Modbus.Net.OPC/OpcDaUtility.cs
@@ -3,6 +3,9 @@ using System.Threading.Tasks;
 
 namespace Modbus.Net.OPC
 {
+    /// <summary>
+    ///     Opc Da协议Api入口
+    /// </summary>
     public class OpcDaUtility : BaseUtility
     {
         public OpcDaUtility(string connectionString) : base(0, 0)
diff --git a/Modbus.Net/Modbus.Net.OPC/OpcProtocal.cs b/Modbus.Net/Modbus.Net.OPC/OpcProtocal.cs
index 14c92c9..74e1d29 100644
--- a/Modbus.Net/Modbus.Net.OPC/OpcProtocal.cs
+++ b/Modbus.Net/Modbus.Net.OPC/OpcProtocal.cs
@@ -2,6 +2,9 @@
 
 namespace Modbus.Net.OPC
 {
+    /// <summary>
+    ///     Opc协议
+    /// </summary>
     public abstract class OpcProtocal : BaseProtocal
     {
         protected OpcProtocal() : base(0, 0)
@@ -9,6 +12,8 @@ namespace Modbus.Net.OPC
         }
     }
 
+    #region 读数据
+
     public class ReadRequestOpcInputStruct : InputStruct
     {
         public ReadRequestOpcInputStruct(string tag)
@@ -43,6 +48,10 @@ namespace Modbus.Net.OPC
         }
     }
 
+    #endregion
+
+    #region 写数据
+
     public class WriteRequestOpcInputStruct : InputStruct
     {
         public WriteRequestOpcInputStruct(string tag, object setValue)
@@ -82,4 +91,6 @@ namespace Modbus.Net.OPC
             return new WriteRequestOpcOutputStruct(ans);
         }
     }
+
+    #endregion
 }
\ No newline at end of file
diff --git a/Modbus.Net/Modbus.Net.OPC/README.md b/Modbus.Net/Modbus.Net.OPC/README.md
new file mode 100644
index 0000000..8c543eb
--- /dev/null
+++ b/Modbus.Net/Modbus.Net.OPC/README.md
@@ -0,0 +1,35 @@
+Modbus.Net.OPC
+===================
+[![NuGet](https://img.shields.io/nuget/v/Modbus.Net.OPC.svg)](https://www.nuget.org/packages/Modbus.Net.OPC/)
+
+Modbus Implementation of Modbus.Net
+
+Table of Content:
+* [Basic Concept](#basic)
+* [Address Mapping](#address)
+* [Link](#link)
+##<a name="basic"></a> Basic Concept
+
+Siemens Protocal is derived by Profibus and Profinet.
+
+##<a name="address"></a> Address Mapping
+
+Modbus.Net.OPC has a simple address formatting tool. You can find it from AddressFormaterOPC.
+
+You need to use messages in BaseMachine and AddressUnit to create an OPC tag.
+
+Here is a Sample.
+
+If your tag is "1/15/Value_Opening", 1 is MachineId, 15 is StationId and Value_Opening is point name.
+
+Your tagGeter code should be.
+
+```C#
+(baseMachine, addressUnit) => return new string[]{baseMachine.Id, ((XXUnitExtend)addressUnit.unitExtend).stationId, addressUnit.Name};
+```
+
+If you want change your tag to "1.15.Value_Opening", just set the seperator to '.' .
+
+##<a name="link"></a> Link
+
+The link of OPC DA should like "opcda://PC-Name/OPC-Software-Name".
diff --git a/Modbus.Net/Modbus.Net.Siemens/AddressFormaterSiemens.cs b/Modbus.Net/Modbus.Net.Siemens/AddressFormaterSiemens.cs
index b4ff1bb..da96bb5 100644
--- a/Modbus.Net/Modbus.Net.Siemens/AddressFormaterSiemens.cs
+++ b/Modbus.Net/Modbus.Net.Siemens/AddressFormaterSiemens.cs
@@ -1,5 +1,8 @@
 namespace Modbus.Net.Siemens
 {
+    /// <summary>
+    ///     Siemens地址格式化（Modbus.Net专用格式）
+    /// </summary>
     public class AddressFormaterSiemens : AddressFormater
     {
         public override string FormatAddress(string area, int address)
@@ -12,4 +15,36 @@
             return area + " " + address + "." + subAddress;
         }
     }
+
+    /// <summary>
+    ///      Siemens地址格式化（Siemens格式）
+    /// </summary>
+    public class AddressFormaterSimenseStandard : AddressFormater
+    {
+        public override string FormatAddress(string area, int address)
+        {
+            if (area.Length > 1 &&
+                area.ToUpper().Substring(0, 2) == "DB")
+            {
+                return area.ToUpper() + "." + "DB" + address;
+            }
+            else
+            {
+                return area.ToUpper() + address;
+            }
+        }
+
+        public override string FormatAddress(string area, int address, int subAddress)
+        {
+            if (area.Length > 1 &&
+                area.ToUpper().Substring(0, 2) == "DB")
+            {
+                return area.ToUpper() + "." + "DB" + address + "." + subAddress;
+            }
+            else
+            {
+                return area.ToUpper() + address + "." + subAddress;
+            }
+        }
+    }
 }
\ No newline at end of file
diff --git a/Modbus.Net/Modbus.Net.Siemens/AddressTranslatorSiemens.cs b/Modbus.Net/Modbus.Net.Siemens/AddressTranslatorSiemens.cs
index 5de74aa..f1f59ea 100644
--- a/Modbus.Net/Modbus.Net.Siemens/AddressTranslatorSiemens.cs
+++ b/Modbus.Net/Modbus.Net.Siemens/AddressTranslatorSiemens.cs
@@ -1,8 +1,12 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Linq;
 
 namespace Modbus.Net.Siemens
 {
+    /// <summary>
+    ///     地址翻译器（Modbus.Net格式）
+    /// </summary>
     public class AddressTranslatorSiemens : AddressTranslator
     {
         protected Dictionary<string, int> AreaCodeDictionary;
@@ -69,4 +73,72 @@ namespace Modbus.Net.Siemens
             return 1;
         }
     }
+
+    /// <summary>
+    ///     地址翻译器（Siemens格式）
+    /// </summary>
+    public class AddressTranslatorSimenseStandard : AddressTranslator
+    {
+        protected Dictionary<string, int> AreaCodeDictionary;
+
+        public AddressTranslatorSimenseStandard()
+        {
+            AreaCodeDictionary = new Dictionary<string, int>
+            {
+                {"S", 0x04},
+                {"SM", 0x05},
+                {"AI", 0x06},
+                {"AQ", 0x07},
+                {"C", 0x1E},
+                {"T", 0x1F},
+                {"HC", 0x20},
+                {"I", 0x81},
+                {"Q", 0x82},
+                {"M", 0x83},
+                {"DB", 0x84},
+                {"V", 0x184},
+            };
+        }
+
+        public override AddressDef AddressTranslate(string address, bool isRead)
+        {
+            address = address.ToUpper();
+            if (address.Substring(0, 2) == "DB")
+            {
+                var addressSplit = address.Split('.');
+                if (addressSplit.Length != 2 && addressSplit.Length != 3) throw new FormatException();
+                addressSplit[0] = addressSplit[0].Substring(2);
+                if (addressSplit[1].Substring(0, 2) == "DB")
+                    addressSplit[1] = addressSplit[1].Substring(2);
+                return new AddressDef
+                {
+                    AreaString = "DB" + addressSplit[0],
+                    Area = int.Parse(addressSplit[0]) * 256 + AreaCodeDictionary["DB"],
+                    Address = int.Parse(addressSplit[1]),
+                    SubAddress = addressSplit.Length == 2 ? 0 : int.Parse(addressSplit[2])
+                };
+            }
+            int i = 0;
+            int t;
+            while (!int.TryParse(address[i].ToString(), out t) && i < address.Length)
+            {
+                i++;
+            }
+            if (i == 0 || i >= address.Length) throw new FormatException();
+            string head = address.Substring(0, i);
+            string[] tail = address.Substring(i).Split('.');
+            return new AddressDef
+            {
+                AreaString = head,
+                Area = AreaCodeDictionary[head],
+                Address = int.Parse(tail[0]),
+                SubAddress = tail.Length == 1 ? 0 : int.Parse(tail[1])
+            };
+        }
+
+        public override double GetAreaByteLength(string area)
+        {
+            return 1;
+        }
+    }
 }
\ No newline at end of file
diff --git a/Modbus.Net/Modbus.Net.Siemens/Modbus.Net.Siemens.csproj b/Modbus.Net/Modbus.Net.Siemens/Modbus.Net.Siemens.csproj
index 92c43e7..57f5533 100644
--- a/Modbus.Net/Modbus.Net.Siemens/Modbus.Net.Siemens.csproj
+++ b/Modbus.Net/Modbus.Net.Siemens/Modbus.Net.Siemens.csproj
@@ -64,6 +64,7 @@
     <None Include="Modbus.Net.Siemens.nuspec">
       <SubType>Designer</SubType>
     </None>
+    <None Include="README.md" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
diff --git a/Modbus.Net/Modbus.Net.Siemens/README.md b/Modbus.Net/Modbus.Net.Siemens/README.md
new file mode 100644
index 0000000..4582164
--- /dev/null
+++ b/Modbus.Net/Modbus.Net.Siemens/README.md
@@ -0,0 +1,42 @@
+Modbus.Net.Siemens
+===================
+[![NuGet](https://img.shields.io/nuget/v/Modbus.Net.Siemens.svg)](https://www.nuget.org/packages/Modbus.Net.Siemens/)
+
+Modbus Implementation of Modbus.Net
+
+Table of Content:
+* [Basic Concept](#basic)
+* [Address Mapping](#address)
+* [Addres Coding](#coding)
+* [SubAddress Rules](#subpos)
+
+##<a name="basic"></a> Basic Concept
+
+Siemens Protocal is derived by Profibus and Profinet.
+
+##<a name="address"></a> Address Mapping
+
+Modbus.Net.Siemens has two types of AddressMapping -- Modbus.Net way or Siemens way.
+
+But Modbus.Net already decleared the type in AddressUnit, so all of the formatting ways will ignore the address type.
+
+The following table shows the differences between them.
+
+Standard Siemens Address | Modbus.Net Address Format | Siemens Address Format |
+------------------------ | ------------------------- | ---------------------- |
+I0.0                     | I 0.0                     | I0.0                   |
+IB0                      | I 0                       | I0                     |
+V10.5                    | V 10.5                    | V10.5                  |
+VB19                     | V 19                      | V19                    |
+DB1.DBD22                | DB1 22                    | DB1.DB22               |
+DB2.DB35.1               | DB2 35.1                  | DB2.DB35.1             |
+
+##<a name="coding"></a> Address Coding
+
+The Coding of Modbus.Net.Siemens is the same as standard siemens protocal.
+
+##<a name="subpos"></a> SubAddress Rules
+
+SubAddress Rules is the same as standard siemens protocal.
+
+Area length will always be 1.
\ No newline at end of file
diff --git a/Modbus.Net/Modbus.Net.Siemens/SiemensMachine.cs b/Modbus.Net/Modbus.Net.Siemens/SiemensMachine.cs
index b742095..6eac8d6 100644
--- a/Modbus.Net/Modbus.Net.Siemens/SiemensMachine.cs
+++ b/Modbus.Net/Modbus.Net.Siemens/SiemensMachine.cs
@@ -2,6 +2,9 @@
 
 namespace Modbus.Net.Siemens
 {
+    /// <summary>
+    ///     西门子设备
+    /// </summary>
     public class SiemensMachine : BaseMachine
     {
         public SiemensMachine(SiemensType connectionType, string connectionString, SiemensMachineModel model,
diff --git a/Modbus.Net/Modbus.Net.Siemens/SiemensPpiProtocal.cs b/Modbus.Net/Modbus.Net.Siemens/SiemensPpiProtocal.cs
index 4710f45..2522fb7 100644
--- a/Modbus.Net/Modbus.Net.Siemens/SiemensPpiProtocal.cs
+++ b/Modbus.Net/Modbus.Net.Siemens/SiemensPpiProtocal.cs
@@ -2,6 +2,9 @@
 
 namespace Modbus.Net.Siemens
 {
+    /// <summary>
+    ///     西门子Ppi协议
+    /// </summary>
     public class SiemensPpiProtocal : SiemensProtocal
     {
         private readonly string _com;
diff --git a/Modbus.Net/Modbus.Net.Siemens/SiemensPpiProtocalLinker.cs b/Modbus.Net/Modbus.Net.Siemens/SiemensPpiProtocalLinker.cs
index 06b4ada..0ddb7ad 100644
--- a/Modbus.Net/Modbus.Net.Siemens/SiemensPpiProtocalLinker.cs
+++ b/Modbus.Net/Modbus.Net.Siemens/SiemensPpiProtocalLinker.cs
@@ -4,6 +4,9 @@ using System.Threading.Tasks;
 
 namespace Modbus.Net.Siemens
 {
+    /// <summary>
+    ///     西门子Ppi协议连接器
+    /// </summary>
     public class SiemensPpiProtocalLinker : ComProtocalLinker
     {
         public SiemensPpiProtocalLinker(string com)
diff --git a/Modbus.Net/Modbus.Net.Siemens/SiemensProtocal.cs b/Modbus.Net/Modbus.Net.Siemens/SiemensProtocal.cs
index ca118a5..36fbec5 100644
--- a/Modbus.Net/Modbus.Net.Siemens/SiemensProtocal.cs
+++ b/Modbus.Net/Modbus.Net.Siemens/SiemensProtocal.cs
@@ -4,31 +4,101 @@ using System.Linq;
 
 namespace Modbus.Net.Siemens
 {
+    /// <summary>
+    ///     西门子数据类型
+    /// </summary>
     public enum SiemensTypeCode : byte
     {
+        /// <summary>
+        ///     布尔
+        /// </summary>
         Bool = 0x01,
+
+        /// <summary>
+        ///     字节
+        /// </summary>
         Byte = 0x02,
+
+        /// <summary>
+        ///     字
+        /// </summary>
         Word = 0x03,
+
+        /// <summary>
+        ///     双字
+        /// </summary>
         DWord = 0x04,
+
+        /// <summary>
+        ///     计数器
+        /// </summary>
         C = 0x1E,
+
+        /// <summary>
+        ///     计时器
+        /// </summary>
         T = 0x1F,
+
+        /// <summary>
+        ///     高速计数器
+        /// </summary>
         HC = 0x20
     }
 
+    /// <summary>
+    ///     西门子通讯报错信息
+    /// </summary>
     public enum SiemensAccessResult : byte
     {
+        /// <summary>
+        ///     无错误
+        /// </summary>
         NoError = 0xFF,
+
+        /// <summary>
+        ///     硬件错误
+        /// </summary>
         HardwareFault = 0x01,
+
+        /// <summary>
+        ///     非法对象访问（Area错误）
+        /// </summary>
         IllegalObjectAccess = 0x03,
+
+        /// <summary>
+        ///     非法地址访问
+        /// </summary>
         InvalidAddress = 0x05,
+
+        /// <summary>
+        ///     不支持的数据类型
+        /// </summary>
         DataTypeNotSupport = 0x06,
+
+        /// <summary>
+        ///     对象不存在或长度超出允许范围
+        /// </summary>
         ObjNotExistOrLengthError = 0x0A
     }
 
+    /// <summary>
+    ///     西门子数据访问类型
+    /// </summary>
     public enum SiemensDataType : byte
     {
+        /// <summary>
+        ///     错误
+        /// </summary>
         Error = 0x00,
+
+        /// <summary>
+        ///     比特位访问
+        /// </summary>
         BitAccess = 0x03,
+
+        /// <summary>
+        ///     一般访问
+        /// </summary>
         OtherAccess = 0x04
     }
 
@@ -39,6 +109,8 @@ namespace Modbus.Net.Siemens
         }
     }
 
+    #region 串口连接建立
+
     internal class ComCreateReferenceSiemensInputStruct : InputStruct
     {
         public ComCreateReferenceSiemensInputStruct(byte slaveAddress, byte masterAddress)
@@ -85,6 +157,10 @@ namespace Modbus.Net.Siemens
         }
     }
 
+    #endregion
+
+    #region 以太网建立连接
+
     internal class CreateReferenceSiemensInputStruct : InputStruct
     {
         public byte TdpuSize;
@@ -167,6 +243,10 @@ namespace Modbus.Net.Siemens
         }
     }
 
+    #endregion
+
+    #region 串口消息确认 
+
     public class ComConfirmMessageSiemensInputStruct : InputStruct
     {
         public ComConfirmMessageSiemensInputStruct(byte slaveAddress, byte masterAddress)
@@ -206,6 +286,10 @@ namespace Modbus.Net.Siemens
         }
     }
 
+    #endregion
+
+    #region 以太网连接确认
+
     internal class EstablishAssociationSiemensInputStruct : InputStruct
     {
         public EstablishAssociationSiemensInputStruct(ushort pduRef, ushort maxCalling, ushort maxCalled, ushort maxPdu)
@@ -270,6 +354,10 @@ namespace Modbus.Net.Siemens
         }
     }
 
+    #endregion
+
+    #region 读数据请求
+
     public class ReadRequestSiemensInputStruct : InputStruct
     {
         public ReadRequestSiemensInputStruct(byte slaveAddress, byte masterAddress, ushort pduRef,
@@ -362,6 +450,10 @@ namespace Modbus.Net.Siemens
         }
     }
 
+    #endregion
+
+    #region 写数据请求
+
     public class WriteRequestSiemensInputStruct : InputStruct
     {
         public WriteRequestSiemensInputStruct(byte slaveAddress, byte masterAddress, ushort pduRef, string startAddress,
@@ -452,7 +544,10 @@ namespace Modbus.Net.Siemens
         }
     }
 
+    #endregion
+
     /*
+    #region 读时间请求
     public class ReadTimeSiemensInputStruct : InputStruct
     {
         public ReadTimeSiemensInputStruct(ushort pduRef)
@@ -490,6 +585,10 @@ namespace Modbus.Net.Siemens
         }
     }
 
+    #endregion
+
+    #region 写时间请求
+    
     public class WriteTimeSiemensInputStruct : InputStruct
     {
         public WriteTimeSiemensInputStruct(ushort pduRef, DateTime dateTime, TodClockStatus todClockStatus)
@@ -528,8 +627,13 @@ namespace Modbus.Net.Siemens
             throw new NotImplementedException();
         }
     }
+
+    #endregion
     */
 
+    /// <summary>
+    ///     西门子通讯报错信息
+    /// </summary>
     public class SiemensProtocalErrorException : ProtocalErrorException
     {
         private static readonly Dictionary<int, string> ProtocalErrorDictionary = new Dictionary<int, string>
diff --git a/Modbus.Net/Modbus.Net.Siemens/SiemensProtocalLinkerBytesExtend.cs b/Modbus.Net/Modbus.Net.Siemens/SiemensProtocalLinkerBytesExtend.cs
index 71643d6..09194b3 100644
--- a/Modbus.Net/Modbus.Net.Siemens/SiemensProtocalLinkerBytesExtend.cs
+++ b/Modbus.Net/Modbus.Net.Siemens/SiemensProtocalLinkerBytesExtend.cs
@@ -2,6 +2,9 @@
 
 namespace Modbus.Net.Siemens
 {
+    /// <summary>
+    ///     西门子Tcp协议扩展
+    /// </summary>
     public class SiemensTcpProtocalLinkerBytesExtend : ProtocalLinkerBytesExtend
     {
         public override byte[] BytesExtend(byte[] content)
@@ -19,6 +22,9 @@ namespace Modbus.Net.Siemens
         }
     }
 
+    /// <summary>
+    ///     西门子Ppi协议扩展
+    /// </summary>
     public class SiemensPpiProtocalLinkerBytesExtend : ProtocalLinkerBytesExtend
     {
         public override byte[] BytesExtend(byte[] content)
diff --git a/Modbus.Net/Modbus.Net.Siemens/SiemensTcpProtocal.cs b/Modbus.Net/Modbus.Net.Siemens/SiemensTcpProtocal.cs
index 5cf6798..82c5a3d 100644
--- a/Modbus.Net/Modbus.Net.Siemens/SiemensTcpProtocal.cs
+++ b/Modbus.Net/Modbus.Net.Siemens/SiemensTcpProtocal.cs
@@ -2,17 +2,19 @@
 
 namespace Modbus.Net.Siemens
 {
+    /// <summary>
+    ///     西门子Tcp协议
+    /// </summary>
     public class SiemensTcpProtocal : SiemensProtocal
     {
-        private readonly ushort _taspSrc;
-        private readonly ushort _tsapDst;
-        private readonly ushort _maxCalling;
-        private readonly ushort _maxCalled;
-        private readonly ushort _maxPdu;
-        private readonly byte _tdpuSize;
-
         private readonly string _ip;
+        private readonly ushort _maxCalled;
+        private readonly ushort _maxCalling;
+        private readonly ushort _maxPdu;
         private readonly int _port;
+        private readonly ushort _taspSrc;
+        private readonly byte _tdpuSize;
+        private readonly ushort _tsapDst;
         private int _connectTryCount;
 
         public SiemensTcpProtocal(byte tdpuSize, ushort tsapSrc, ushort tsapDst, ushort maxCalling, ushort maxCalled,
@@ -87,6 +89,7 @@ namespace Modbus.Net.Siemens
             _connectTryCount = 0;
             var inputStruct = new CreateReferenceSiemensInputStruct(_tdpuSize, _taspSrc, _tsapDst);
             return
+                //先建立连接，然后建立设备的引用
                 await await
                     ForceSendReceiveAsync(this[typeof (CreateReferenceSiemensProtocal)], inputStruct)
                         .ContinueWith(async answer =>
diff --git a/Modbus.Net/Modbus.Net.Siemens/SiemensTcpProtocalLinker.cs b/Modbus.Net/Modbus.Net.Siemens/SiemensTcpProtocalLinker.cs
index a41105b..88c65b0 100644
--- a/Modbus.Net/Modbus.Net.Siemens/SiemensTcpProtocalLinker.cs
+++ b/Modbus.Net/Modbus.Net.Siemens/SiemensTcpProtocalLinker.cs
@@ -2,6 +2,9 @@
 
 namespace Modbus.Net.Siemens
 {
+    /// <summary>
+    ///     西门子Tcp协议连接器
+    /// </summary>
     public class SiemensTcpProtocalLinker : TcpProtocalLinker
     {
         public SiemensTcpProtocalLinker(string ip)
diff --git a/Modbus.Net/Modbus.Net.Siemens/SiemensUtility.cs b/Modbus.Net/Modbus.Net.Siemens/SiemensUtility.cs
index 5237157..97db5f0 100644
--- a/Modbus.Net/Modbus.Net.Siemens/SiemensUtility.cs
+++ b/Modbus.Net/Modbus.Net.Siemens/SiemensUtility.cs
@@ -20,15 +20,17 @@ namespace Modbus.Net.Siemens
         S7_1500 = 5
     }
 
-
+    /// <summary>
+    ///     西门子通讯Api入口
+    /// </summary>
     public class SiemensUtility : BaseUtility
     {
-        private readonly byte _tdpuSize;
-        private readonly ushort _taspSrc;
-        private readonly ushort _tsapDst;
-        private readonly ushort _maxCalling;
         private readonly ushort _maxCalled;
+        private readonly ushort _maxCalling;
         private readonly ushort _maxPdu;
+        private readonly ushort _taspSrc;
+        private readonly byte _tdpuSize;
+        private readonly ushort _tsapDst;
 
         private SiemensType _siemensType;
 
@@ -119,6 +121,9 @@ namespace Modbus.Net.Siemens
             }
         }
 
+        /// <summary>
+        ///     西门子连接类型
+        /// </summary>
         public SiemensType ConnectionType
         {
             get { return _siemensType; }
@@ -127,6 +132,7 @@ namespace Modbus.Net.Siemens
                 _siemensType = value;
                 switch (_siemensType)
                 {
+                    //PPI
                     case SiemensType.Ppi:
                     {
                         Wrapper = ConnectionString == null
@@ -134,10 +140,12 @@ namespace Modbus.Net.Siemens
                             : new SiemensPpiProtocal(ConnectionString, SlaveAddress, MasterAddress);
                         break;
                     }
+                    //MPI
                     //case SiemensType.Mpi:
                     //    {
                     //        throw new NotImplementedException();
                     //    }
+                    //Ethenet
                     case SiemensType.Tcp:
                     {
                         Wrapper = ConnectionString == null
@@ -153,11 +161,21 @@ namespace Modbus.Net.Siemens
             }
         }
 
+        /// <summary>
+        ///     设置连接类型
+        /// </summary>
+        /// <param name="connectionType">需要设置的连接类型</param>
         public override void SetConnectionType(int connectionType)
         {
             ConnectionType = (SiemensType) connectionType;
         }
 
+        /// <summary>
+        ///     读数据
+        /// </summary>
+        /// <param name="startAddress">开始地址</param>
+        /// <param name="getByteCount">读取字节个数</param>
+        /// <returns>从设备中读取的数据</returns>
         public override async Task<byte[]> GetDatasAsync(string startAddress, int getByteCount)
         {
             try
@@ -176,6 +194,12 @@ namespace Modbus.Net.Siemens
             }
         }
 
+        /// <summary>
+        ///     写数据
+        /// </summary>
+        /// <param name="startAddress">开始地址</param>
+        /// <param name="setContents">需要写入的数据</param>
+        /// <returns>写入是否成功</returns>
         public override async Task<bool> SetDatasAsync(string startAddress, object[] setContents)
         {
             try
diff --git a/Modbus.Net/Modbus.Net/BaseUtility.cs b/Modbus.Net/Modbus.Net/BaseUtility.cs
index 9b6fb2c..f2b2a7b 100644
--- a/Modbus.Net/Modbus.Net/BaseUtility.cs
+++ b/Modbus.Net/Modbus.Net/BaseUtility.cs
@@ -5,6 +5,9 @@ using System.Threading.Tasks;
 
 namespace Modbus.Net
 {
+    /// <summary>
+    ///      基础Api入口
+    /// </summary>
     public abstract class BaseUtility
     {
         /// <summary>