diff --git a/SCADA/Program/ModbusDriver/ModbusRTUDriver.cs b/SCADA/Program/ModbusDriver/ModbusRTUDriver.cs
index d03f705..b08d16d 100644
--- a/SCADA/Program/ModbusDriver/ModbusRTUDriver.cs
+++ b/SCADA/Program/ModbusDriver/ModbusRTUDriver.cs
@@ -47,7 +47,7 @@ namespace ModbusDriver
             }
         }
 
-        private int _timeOut;
+        private int _timeOut = 1000;
         public int TimeOut
         {
             get { return _timeOut; }
@@ -79,6 +79,7 @@ namespace ModbusDriver
             {
                 if (_serialPort == null)
                     _serialPort = new SerialPort(_port);
+                if (_timeOut <= 0) _timeOut = 1000;
                 _serialPort.ReadTimeout = _timeOut;
                 _serialPort.WriteTimeout = _timeOut;
                 _serialPort.BaudRate = _baudRate;
diff --git a/SCADA/Program/ModbusDriver/ModbusTCPDriver.cs b/SCADA/Program/ModbusDriver/ModbusTCPDriver.cs
index 7723f3b..5930e6d 100644
--- a/SCADA/Program/ModbusDriver/ModbusTCPDriver.cs
+++ b/SCADA/Program/ModbusDriver/ModbusTCPDriver.cs
@@ -107,7 +107,7 @@ namespace ModbusDriver
         }
 
         #endregion
-        private int _timeout;
+        private int _timeout = 1000;
 
         private Socket tcpSynCl;
         private byte[] tcpSynClBuffer = new byte[0xFF];
@@ -180,6 +180,7 @@ namespace ModbusDriver
                 //IPAddress ip = IPAddress.Parse(_ip);
                 // ----------------------------------------------------------------
                 // Connect synchronous client
+                if (_timeout <= 0) _timeout = 1000;
                 tcpSynCl = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                 tcpSynCl.SendTimeout = _timeout;
                 tcpSynCl.ReceiveTimeout = _timeout;
diff --git a/SCADA/Program/SiemensPLCDriver/SiemensPLCDriver.cs b/SCADA/Program/SiemensPLCDriver/SiemensPLCDriver.cs
index 91accf3..c382367 100644
--- a/SCADA/Program/SiemensPLCDriver/SiemensPLCDriver.cs
+++ b/SCADA/Program/SiemensPLCDriver/SiemensPLCDriver.cs
@@ -45,7 +45,7 @@ namespace SiemensPLCDriver
             }
         }
 
-        int _timeOut;
+        int _timeOut = 1000;
         public int TimeOut
         {
             get
diff --git a/SCADA/dll/ModbusDriver.dll b/SCADA/dll/ModbusDriver.dll
index c780341..f7db08d 100644
Binary files a/SCADA/dll/ModbusDriver.dll and b/SCADA/dll/ModbusDriver.dll differ
diff --git a/SCADA/dll/SiemensPLCDriver.dll b/SCADA/dll/SiemensPLCDriver.dll
index 0965929..10dc600 100644
Binary files a/SCADA/dll/SiemensPLCDriver.dll and b/SCADA/dll/SiemensPLCDriver.dll differ