diff --git a/UserClass/PID.cs b/UserClass/PID.cs
index 73a0457..e01e57a 100644
--- a/UserClass/PID.cs
+++ b/UserClass/PID.cs
@@ -19,6 +19,7 @@ namespace DyeingComputer.UserClass
         private static double e1 = 0;              // Error one iteration old
         private static double e2 = 0;              // Error two iterations old
 
+        #region 构造函数
         /// <summary>
         /// PID构造器
         /// </summary>
@@ -38,6 +39,16 @@ namespace DyeingComputer.UserClass
             this.OutputLowerLimit = OutputLowerLimit;
         }
 
+        public PID()
+        {
+            this.Kp = 0.5;
+            this.Ki = 0.1;
+            this.Kd = 0.2;
+            this.N = 1;
+            this.OutputUpperLimit = 65530;
+            this.OutputLowerLimit = 0;
+        }
+        #endregion
         /// <summary>
         /// PID迭代器，在每个采样周期调用此函数以获取当前控制器输出。
         /// 设定点和过程值应使用相同的单位。
diff --git a/ViewModel/MainWindowViewModel.cs b/ViewModel/MainWindowViewModel.cs
index 06ee2ff..53852bd 100644
--- a/ViewModel/MainWindowViewModel.cs
+++ b/ViewModel/MainWindowViewModel.cs
@@ -52,23 +52,21 @@ namespace DyeingComputer.ViewModel
         private readonly string DBAddress = Environment.CurrentDirectory + "\\DataBase\\800COMPUTER.db";  //数据库路径
         private PID PID = null;
         private IniFile.IniFiles Configini = new IniFile.IniFiles(Convert.ToString(System.AppDomain.CurrentDomain.BaseDirectory) + "DyeingComputer.ini");
-
+        PID pid = new PID();
 
         public MainWindowViewModel()
         {
             SQLiteHelpers = new SQLiteHelper(DBAddress); //数据库连接路径
             SQLiteHelpers.Open();  //打开数据库
-            double ST01 = Convert.ToDouble( SQLiteHelpers.ExecuteScalar("select value from system where ParameterID = 'ST01'", null));  //读取
-            double ST02 = Convert.ToDouble( SQLiteHelpers.ExecuteScalar("select value from system where ParameterID = 'ST02'", null));
-            double ST03 = Convert.ToDouble( SQLiteHelpers.ExecuteScalar("select value from system where ParameterID = 'ST03'", null));
-            double ST04 = Convert.ToDouble(SQLiteHelpers.ExecuteScalar("select value from system where ParameterID = 'ST04'", null));  
-            double ST05 = Convert.ToDouble(SQLiteHelpers.ExecuteScalar("select value from system where ParameterID = 'ST05'", null));
-            double ST06 = Convert.ToDouble(SQLiteHelpers.ExecuteScalar("select value from system where ParameterID = 'ST06'", null));
+            pid.Kp = Convert.ToDouble( SQLiteHelpers.ExecuteScalar("select value from system where ParameterID = 'ST01'", null));  //读取
+            pid.Ki = Convert.ToDouble( SQLiteHelpers.ExecuteScalar("select value from system where ParameterID = 'ST02'", null));
+            pid.Kd = Convert.ToDouble( SQLiteHelpers.ExecuteScalar("select value from system where ParameterID = 'ST03'", null));
+            pid.N = Convert.ToDouble(SQLiteHelpers.ExecuteScalar("select value from system where ParameterID = 'ST04'", null));  
+            pid.OutputUpperLimit = Convert.ToDouble(SQLiteHelpers.ExecuteScalar("select value from system where ParameterID = 'ST05'", null));
+            pid.OutputLowerLimit = Convert.ToDouble(SQLiteHelpers.ExecuteScalar("select value from system where ParameterID = 'ST06'", null));
             SQLiteHelpers.Close();
 
             WorkNumder = "----------";
-            PID pid=new PID(ST01,ST02,ST03,ST04,ST05,ST06);
-
             CountDown();   //启动循环任务
             SQL_data();   //读数据库
             UPort();    //启动串口