diff --git a/Modbus.Net/CrossLampControl.WebApi/Controllers/CrossLampController.cs b/Modbus.Net/CrossLampControl.WebApi/Controllers/CrossLampController.cs
index bb78bba..da3e203 100644
--- a/Modbus.Net/CrossLampControl.WebApi/Controllers/CrossLampController.cs
+++ b/Modbus.Net/CrossLampControl.WebApi/Controllers/CrossLampController.cs
@@ -16,7 +16,7 @@ namespace CrossLampControl.WebApi.Controllers
 
         public CrossLampController()
         {
-            _utility = new SimenseUtility(SimenseType.Tcp, "192.168.3.241,200");
+            _utility = new SimenseUtility(SimenseType.Tcp, "192.168.3.241", SimenseMachineModel.S7_200);
             _utility.AddressTranslator = new AddressTranslatorSimense();
         }
 
diff --git a/Modbus.Net/ModBus.Net/BaseMachine.cs b/Modbus.Net/ModBus.Net/BaseMachine.cs
index 1265cc7..f2a182c 100644
--- a/Modbus.Net/ModBus.Net/BaseMachine.cs
+++ b/Modbus.Net/ModBus.Net/BaseMachine.cs
@@ -43,9 +43,9 @@ namespace ModBus.Net
             KeepConnect = keepConnect;
         }
 
-        public Dictionary<string,string> GetDatas()
+        public Dictionary<string,ReturnUnit> GetDatas()
         {
-            Dictionary<string, string> ans = new Dictionary<string, string>();
+            Dictionary<string, ReturnUnit> ans = new Dictionary<string, ReturnUnit>();
             if (!BaseUtility.IsConnected)
             {
                 BaseUtility.Connect();
@@ -61,7 +61,7 @@ namespace ModBus.Net
                             p => p.Area == communicateAddress.Area && p.Address == pos + communicateAddress.Address);
                     if (address != null)
                     {
-                        ans.Add(address.CommunicationTag, (String.Format("{0:#0.#}", Math.Round(Double.Parse(ValueHelper.Instance.GetValue(datas, ref pos, address.DataType).ToString()) * address.Zoom, 3))));
+                        ans.Add(address.CommunicationTag, new ReturnUnit{PlcValue = String.Format("{0:#0.#}", Math.Round(Single.Parse(ValueHelper.Instance.GetValue(datas, ref pos, address.DataType).ToString()) * address.Zoom, 3)),ExtendUnit = address.ExtendUnit});
                     }
                     else
                     {
@@ -100,7 +100,7 @@ namespace ModBus.Net
         }
     }
 
-    public struct CommunicationUnit
+    public class CommunicationUnit
     {
         public string Area { get; set; }
         public int Address { get; set; }
@@ -108,6 +108,17 @@ namespace ModBus.Net
         public Type DataType { get; set; }
     }
 
+    public class ExtendUnit
+    {
+        
+    }
+
+    public class ReturnUnit
+    {
+        public string PlcValue { get; set; }
+        public ExtendUnit ExtendUnit { get; set; }
+    }
+
     public class AddressUnit
     {
         public int Id { get; set; }
@@ -127,6 +138,8 @@ namespace ModBus.Net
         public string CommunicationTag { get; set; }
         public string Name { get; set; }
         public string Unit { get; set; }
+
+        public ExtendUnit ExtendUnit { get; set; }
     }
 
     public struct AddressUnitEqualityComparer : IEqualityComparer<AddressUnit>
diff --git a/Modbus.Net/ModBus.Net/BaseProtocal.cs b/Modbus.Net/ModBus.Net/BaseProtocal.cs
index dba1459..6728642 100644
--- a/Modbus.Net/ModBus.Net/BaseProtocal.cs
+++ b/Modbus.Net/ModBus.Net/BaseProtocal.cs
@@ -71,15 +71,25 @@ namespace ModBus.Net
         public virtual OutputStruct SendReceive(ProtocalUnit unit, InputStruct content)
         {
             int t = 0;
-            //如果为特别处理协议的话，跳过协议扩展收缩
-            if (unit is SpecialProtocalUnit)
+            //如果为特别处理协议的话，跳过协议扩展收缩          
+            var formatContent = unit.Format(content);
+            if (formatContent != null)
             {
-                return unit.Unformat(ProtocalLinker.SendReceiveWithoutExtAndDec(unit.Format(content)), ref t);
-            }
-            else
-            {
-                return unit.Unformat(ProtocalLinker.SendReceive(unit.Format(content)), ref t);
+                byte[] receiveContent;
+                if (unit is SpecialProtocalUnit)
+                {
+                    receiveContent = ProtocalLinker.SendReceiveWithoutExtAndDec(formatContent);
+                }
+                else
+                {
+                    receiveContent = ProtocalLinker.SendReceive(formatContent);
+                }
+                if (receiveContent != null)
+                {
+                    return unit.Unformat(receiveContent, ref t);
+                }
             }
+            return null;
         }
 
         /// <summary>
diff --git a/Modbus.Net/ModBus.Net/TaskManager.cs b/Modbus.Net/ModBus.Net/TaskManager.cs
index 559fbee..a173cad 100644
--- a/Modbus.Net/ModBus.Net/TaskManager.cs
+++ b/Modbus.Net/ModBus.Net/TaskManager.cs
@@ -167,7 +167,7 @@ namespace ModBus.Net
     public class TaskManager
     {
         private HashSet<BaseMachine> _machines;
-        private TaskFactory<Dictionary<string,string>> _tasks;
+        private TaskFactory<Dictionary<string,ReturnUnit>> _tasks;
         private TaskScheduler _scheduler;
         private CancellationTokenSource _cts;
         private Timer _timer;
@@ -191,7 +191,7 @@ namespace ModBus.Net
             }
         }
 
-        public delegate void ReturnValuesDelegate(KeyValuePair<string, Dictionary<string,string>> returnValue);
+        public delegate void ReturnValuesDelegate(KeyValuePair<string, Dictionary<string,ReturnUnit>> returnValue);
 
         public event ReturnValuesDelegate ReturnValues;
 
@@ -304,7 +304,7 @@ namespace ModBus.Net
         {
             TaskStop();
             _cts = new CancellationTokenSource();
-            _tasks = new TaskFactory<Dictionary<string,string>>(_cts.Token, TaskCreationOptions.None, TaskContinuationOptions.None, _scheduler);
+            _tasks = new TaskFactory<Dictionary<string,ReturnUnit>>(_cts.Token, TaskCreationOptions.None, TaskContinuationOptions.None, _scheduler);
             GetCycle = TimeRestore.Restore;
         }
 
@@ -335,7 +335,7 @@ namespace ModBus.Net
                 var ans = _tasks.StartNew(machine.GetDatas).Result;
                 if (ReturnValues != null)
                 {
-                    ReturnValues(new KeyValuePair<string, Dictionary<string,string>>(machine.Id, ans));
+                    ReturnValues(new KeyValuePair<string, Dictionary<string,ReturnUnit>>(machine.Id, ans));
                 }
             }
             catch (Exception e)
@@ -343,7 +343,7 @@ namespace ModBus.Net
                 
                 if (ReturnValues != null)
                 {
-                    ReturnValues(new KeyValuePair<string, Dictionary<string,string>>(machine.Id, null));
+                    ReturnValues(new KeyValuePair<string, Dictionary<string,ReturnUnit>>(machine.Id, null));
                 }
             }
         }