diff --git a/Modbus.Net/Modbus.Net/BaseMachine.cs b/Modbus.Net/Modbus.Net/BaseMachine.cs
index e972ddc..930433e 100644
--- a/Modbus.Net/Modbus.Net/BaseMachine.cs
+++ b/Modbus.Net/Modbus.Net/BaseMachine.cs
@@ -43,7 +43,7 @@ namespace Modbus.Net
         /// <summary>
         /// 设备的Id
         /// </summary>
-        public int Id { get; set; }
+        public string Id { get; set; }
 
         /// <summary>
         /// 设备所在工程的名称
@@ -494,7 +494,7 @@ namespace Modbus.Net
         /// <summary>
         /// 数据单元Id
         /// </summary>
-        public int Id { get; set; }
+        public string Id { get; set; }
         /// <summary>
         /// 数据所属的区域
         /// </summary>
@@ -558,7 +558,7 @@ namespace Modbus.Net
         /// <summary>
         /// Id
         /// </summary>
-        int Id { get; set; }
+        string Id { get; set; }
         /// <summary>
         /// 工程名
         /// </summary>
diff --git a/Modbus.Net/Modbus.Net/TaskManager.cs b/Modbus.Net/Modbus.Net/TaskManager.cs
index 5bccfc3..53ac2a1 100644
--- a/Modbus.Net/Modbus.Net/TaskManager.cs
+++ b/Modbus.Net/Modbus.Net/TaskManager.cs
@@ -9,7 +9,7 @@ namespace Modbus.Net
 {
     public class TaskReturnDef
     {
-        public int MachineId { get; set; }
+        public string MachineId { get; set; }
         public Dictionary<string, ReturnUnit> ReturnValues { get; set; }
     }
 
@@ -355,7 +355,7 @@ namespace Modbus.Net
         /// 根据设备的id移除设备
         /// </summary>
         /// <param name="id">设备的id</param>
-        public void RemoveMachineWithId(int id)
+        public void RemoveMachineWithId(string id)
         {
             lock (_machines)
             {
@@ -371,7 +371,7 @@ namespace Modbus.Net
         /// 将设备指定为未连接
         /// </summary>
         /// <param name="id">设备的id</param>
-        public void MoveMachineToUnlinked(int id)
+        public void MoveMachineToUnlinked(string id)
         {
             IEnumerable<BaseMachine> machines;
             lock(_machines)
@@ -393,7 +393,7 @@ namespace Modbus.Net
         /// 将设备指定为已连接
         /// </summary>
         /// <param name="id">设备的id</param>
-        public void MoveMachineToLinked(int id)
+        public void MoveMachineToLinked(string id)
         {
             IEnumerable<BaseMachine> machines;
             lock (_unlinkedMachines)