diff --git a/Modbus.Net/Modbus.Net.Modbus/ModbusAsciiProtocolLinker.cs b/Modbus.Net/Modbus.Net.Modbus/ModbusAsciiProtocolLinker.cs
index 8c80f7c..febb4ab 100644
--- a/Modbus.Net/Modbus.Net.Modbus/ModbusAsciiProtocolLinker.cs
+++ b/Modbus.Net/Modbus.Net.Modbus/ModbusAsciiProtocolLinker.cs
@@ -24,7 +24,7 @@ namespace Modbus.Net.Modbus
         /// <param name="com">串口地址</param>
         /// <param name="slaveAddress">从站号</param>
         public ModbusAsciiProtocolLinker(string com, int slaveAddress)
-            : base(com, 9600, Parity.None, StopBits.One, 8, slaveAddress)
+            : base(com, slaveAddress)
         {
             ((BaseConnector)BaseConnector).AddController(new MatchController(new ICollection<(int, int)>[] { new List<(int, int)> { (1, 1), (2, 2) }, new List<(int, int)> { (3, 3), (4, 4) } }, int.Parse(configuration.GetSection("Modbus.Net")["FetchSleepTime"] ?? "0")));
         }
diff --git a/Modbus.Net/Modbus.Net.Modbus/ModbusRtuProtocolLinker.cs b/Modbus.Net/Modbus.Net.Modbus/ModbusRtuProtocolLinker.cs
index 9e66d7b..0ecace2 100644
--- a/Modbus.Net/Modbus.Net.Modbus/ModbusRtuProtocolLinker.cs
+++ b/Modbus.Net/Modbus.Net.Modbus/ModbusRtuProtocolLinker.cs
@@ -23,7 +23,7 @@ namespace Modbus.Net.Modbus
         /// <param name="com">串口地址</param>
         /// <param name="slaveAddress">从站号</param>
         public ModbusRtuProtocolLinker(string com, int slaveAddress)
-            : base(com, 9600, Parity.None, StopBits.One, 8, slaveAddress)
+            : base(com, slaveAddress)
         {
             ((BaseConnector)BaseConnector).AddController(new MatchController(new ICollection<(int, int)>[] { new List<(int, int)> { (0, 0) }, new List<(int, int)> { (1, 1) } }, int.Parse(configuration.GetSection("Modbus.Net")["FetchSleepTime"] ?? "0")));
         }
diff --git a/Modbus.Net/Modbus.Net.Siemens/SiemensPpiProtocolLinker.cs b/Modbus.Net/Modbus.Net.Siemens/SiemensPpiProtocolLinker.cs
index 073922a..6ba290c 100644
--- a/Modbus.Net/Modbus.Net.Siemens/SiemensPpiProtocolLinker.cs
+++ b/Modbus.Net/Modbus.Net.Siemens/SiemensPpiProtocolLinker.cs
@@ -25,7 +25,7 @@ namespace Modbus.Net.Siemens
         /// <param name="com">串口地址</param>
         /// <param name="slaveAddress">从站号</param>
         public SiemensPpiProtocolLinker(string com, int slaveAddress)
-            : base(com, 9600, Parity.Even, StopBits.One, 8, slaveAddress)
+            : base(com, slaveAddress)
         {
             ((BaseConnector)BaseConnector).AddController(new FifoController(int.Parse(configuration.GetSection("Modbus.Net")["FetchSleepTime"] ?? "0"), true, null, 100));
         }
diff --git a/Modbus.Net/Modbus.Net/Controller/FifoController.cs b/Modbus.Net/Modbus.Net/Controller/FifoController.cs
index f69ccbc..c0b96c4 100644
--- a/Modbus.Net/Modbus.Net/Controller/FifoController.cs
+++ b/Modbus.Net/Modbus.Net/Controller/FifoController.cs
@@ -1,6 +1,8 @@
-using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
 using System.Threading;
 
@@ -11,6 +13,12 @@ namespace Modbus.Net
     /// </summary>
     public class FifoController : BaseController
     {
+        private static readonly IConfigurationRoot configuration = new ConfigurationBuilder()
+            .SetBasePath(Directory.GetCurrentDirectory())
+            .AddJsonFile("appsettings.json")
+            .AddJsonFile($"appsettings.{Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") ?? "Production"}.json", true)
+            .Build();
+
         private static readonly ILogger<FifoController> logger = LogProvider.CreateLogger<FifoController>();
 
         private MessageWaitingDef _currentSendingPos;
@@ -33,10 +41,10 @@ namespace Modbus.Net
         /// <param name="activateSema">是否开启信号量</param>
         /// <param name="duplicateFunc">包切分函数</param>
         /// <param name="waitingListMaxCount">包等待队列长度</param>
-        public FifoController(int acquireTime, bool activateSema = true, Func<byte[], ICollection<byte[]>> duplicateFunc = null, int waitingListMaxCount = 1)
+        public FifoController(int acquireTime, bool activateSema = true, Func<byte[], ICollection<byte[]>> duplicateFunc = null, int waitingListMaxCount = 100)
             : base(duplicateFunc)
         {
-            _waitingListMaxCount = waitingListMaxCount;
+            _waitingListMaxCount = int.Parse(configuration.GetSection("Modbus.Net")["WaitingListCount"] ?? waitingListMaxCount.ToString());
             if (activateSema)
             {
                 _taskCycleSema = new Semaphore(0, _waitingListMaxCount);
diff --git a/Modbus.Net/Modbus.Net/Controller/MatchController.cs b/Modbus.Net/Modbus.Net/Controller/MatchController.cs
index 4ce239d..e9f9dc8 100644
--- a/Modbus.Net/Modbus.Net/Controller/MatchController.cs
+++ b/Modbus.Net/Modbus.Net/Controller/MatchController.cs
@@ -23,7 +23,7 @@ namespace Modbus.Net
         /// <param name="duplicateFunc">包切分函数</param>
         /// <param name="waitingListMaxCount">包等待队列长度</param>
         public MatchController(ICollection<(int, int)>[] keyMatches, int acquireTime, bool activateSema = true,
-            Func<byte[], ICollection<byte[]>> duplicateFunc = null, int waitingListMaxCount = 1) : base(acquireTime, activateSema, duplicateFunc, waitingListMaxCount)
+            Func<byte[], ICollection<byte[]>> duplicateFunc = null, int waitingListMaxCount = 100) : base(acquireTime, activateSema, duplicateFunc, waitingListMaxCount)
         {
             KeyMatches = keyMatches;
         }
diff --git a/Modbus.Net/Modbus.Net/Controller/MatchDirectlySendController.cs b/Modbus.Net/Modbus.Net/Controller/MatchDirectlySendController.cs
index 0bb44be..86ea490 100644
--- a/Modbus.Net/Modbus.Net/Controller/MatchDirectlySendController.cs
+++ b/Modbus.Net/Modbus.Net/Controller/MatchDirectlySendController.cs
@@ -10,7 +10,7 @@ namespace Modbus.Net
     {
         /// <inheritdoc />
         public MatchDirectlySendController(ICollection<(int, int)>[] keyMatches,
-            Func<byte[], ICollection<byte[]>> duplicateFunc = null, int waitingListMaxCount = 1) : base(keyMatches,
+            Func<byte[], ICollection<byte[]>> duplicateFunc = null, int waitingListMaxCount = 100) : base(keyMatches,
             0, false, duplicateFunc, waitingListMaxCount)
         {
         }
diff --git a/Modbus.Net/Modbus.Net/Linker/ComProtocolLinker.cs b/Modbus.Net/Modbus.Net/Linker/ComProtocolLinker.cs
index 29c6797..6ff6eb1 100644
--- a/Modbus.Net/Modbus.Net/Linker/ComProtocolLinker.cs
+++ b/Modbus.Net/Modbus.Net/Linker/ComProtocolLinker.cs
@@ -19,13 +19,19 @@ namespace Modbus.Net
         /// <summary>
         ///     构造器
         /// </summary>
-        /// <param name="baudRate">波特率</param>
-        /// <param name="parity">校验位</param>
-        /// <param name="stopBits">停止位</param>
-        /// <param name="dataBits">数据位</param>
         /// <param name="slaveAddress">从站地址</param>
-        protected ComProtocolLinker(int baudRate, Parity parity, StopBits stopBits, int dataBits, int slaveAddress)
-            : this(configuration.GetSection("Modbus.Net")["COM"], baudRate, parity, stopBits, dataBits, slaveAddress)
+        protected ComProtocolLinker(int slaveAddress)
+            : this(configuration.GetSection("Modbus.Net")["COM"] ?? "COM1", slaveAddress)
+        {
+        }
+
+        /// <summary>
+        ///     构造器
+        /// </summary>
+        /// <param name="com">串口端口号</param>
+        /// <param name="slaveAddress">从站地址</param>
+        protected ComProtocolLinker(string com, int slaveAddress)
+            : this(com, slaveAddress, int.Parse(configuration.GetSection("Modbus.Net")["ComBaudRate"] ?? "9600"), Enum.Parse<Parity>(configuration.GetSection("Modbus.Net")["ComParity"] ?? "Parity.None"), Enum.Parse<StopBits>(configuration.GetSection("Modbus.Net")["ComStopBits"] ?? "StopBits.One"), int.Parse(configuration.GetSection("Modbus.Net")["ComDataBits"] ?? "8"))
         {
         }
 
@@ -39,11 +45,11 @@ namespace Modbus.Net
         /// <param name="dataBits">数据位</param>
         /// <param name="slaveAddress">从站地址</param>
         /// <param name="isFullDuplex">是否为全双工</param>
-        protected ComProtocolLinker(string com, int baudRate, Parity parity, StopBits stopBits, int dataBits,
-            int slaveAddress, bool isFullDuplex = false)
+        protected ComProtocolLinker(string com, int slaveAddress, int baudRate, Parity parity, StopBits stopBits, int dataBits,
+             bool isFullDuplex = false)
             : this(
-                com, baudRate, parity, stopBits, dataBits,
-                int.Parse(configuration.GetSection("Modbus.Net")["ComConnectionTimeout"] ?? "-1"), slaveAddress, isFullDuplex)
+                com, slaveAddress, baudRate, parity, stopBits, dataBits,
+                int.Parse(configuration.GetSection("Modbus.Net")["ComConnectionTimeout"] ?? "-1"), isFullDuplex)
         {
         }
 
@@ -58,8 +64,8 @@ namespace Modbus.Net
         /// <param name="connectionTimeout">超时时间</param>
         /// <param name="slaveAddress">从站地址</param>
         /// <param name="isFullDuplex">是否为全双工</param>
-        protected ComProtocolLinker(string com, int baudRate, Parity parity, StopBits stopBits, int dataBits,
-            int connectionTimeout, int slaveAddress, bool isFullDuplex = false)
+        protected ComProtocolLinker(string com, int slaveAddress, int baudRate, Parity parity, StopBits stopBits, int dataBits,
+            int connectionTimeout,  bool isFullDuplex = false)
         {
             if (connectionTimeout == -1)
             {
diff --git a/Modbus.Net/Modbus.Net/appsettings.json b/Modbus.Net/Modbus.Net/appsettings.json
index 0ad9944..be3471f 100644
--- a/Modbus.Net/Modbus.Net/appsettings.json
+++ b/Modbus.Net/Modbus.Net/appsettings.json
@@ -3,9 +3,14 @@
     "COM": "COM1",
     "IP": "192.168.1.1",
     "ComConnectionTimeout": "3000",
+    "ComBaudRate": "9600",
+    "ComParity": "Parity.None",
+    "ComStopBits": "StopBits.One",
+    "ComDataBits": "8",
     "IPConnectionTimeout": "5000",
     "ModbusPort": "502",
     "SiemensPort": "102",
-    "FetchSleepTime": "100"
+    "FetchSleepTime": "100",
+    "WaitingListCount": "100"
   }
 }
\ No newline at end of file