diff --git a/Servo/Servo.pro b/Servo/Servo.pro
index 23df4c0..5ffb908 100644
--- a/Servo/Servo.pro
+++ b/Servo/Servo.pro
@@ -24,7 +24,8 @@ SOURCES += \
     $$files(*.cpp, true)
 
 HEADERS += \
-    $$files(*.h, true)
+    $$files(*.h, true) \
+    include/ExpConfig.h
 
 
 INCLUDEPATH += $$PWD/include
diff --git a/Servo/include/ExpConfig.h b/Servo/include/ExpConfig.h
index 164c5da..4fa340c 100644
--- a/Servo/include/ExpConfig.h
+++ b/Servo/include/ExpConfig.h
@@ -1,4 +1,12 @@
 #ifndef EXPCONFIG_H
 #define EXPCONFIG_H
 
-#endif // EXPCONFIG_H
+#include <QString>
+
+struct ExpConfig
+{
+	bool valid = false;
+	QString message;
+};
+
+#endif //EXPCONFIG_H
diff --git a/Servo/include/ModbusMaster.h b/Servo/include/ModbusMaster.h
index 3fd9cf5..e2437d9 100644
--- a/Servo/include/ModbusMaster.h
+++ b/Servo/include/ModbusMaster.h
@@ -9,6 +9,8 @@
 #include "ServoException.h"
 #include "ModbusConfig.h"
 
+#include "ExpConfig.h"
+
 class QModbusClient;
 class QModbusReply;
 
@@ -42,10 +44,12 @@ public	slots:
 
 	void connectToDevice(ModbusConfig modbusConfig);
 	void connectionStateChanged(QModbusDevice::State state);
-	QBitArray getCoil(int startAddress, quint16 readSize);
+
+	QBitArray getCoil(int startAddress, quint16 readSize, ExpConfig& expConfig);
 	QBitArray getInputCoil(int startAddress, quint16 readSize);
 	QVector<quint16> getHoldingRegister(int startAddress, quint16 readSize);
 	QVector<quint16> getInputRegister(int startAddress, quint16 readSize);
+
 	void setSingleCoil(int startAddress, bool coilFlag);
 	void setMultipleCoil(int startAddress, quint16 writeSize, QBitArray coilFlags);
 	void setSingleRegister(int startAddress, quint16 registerValue);
diff --git a/Servo/include/ModbusWrapper.h b/Servo/include/ModbusWrapper.h
index bc6ddf1..3f56b3e 100644
--- a/Servo/include/ModbusWrapper.h
+++ b/Servo/include/ModbusWrapper.h
@@ -35,7 +35,8 @@ public:
 signals:
 	void connectOrder(ModbusConfig modbusConfig);
 	void initOrder();
-	QBitArray getCoilOrder(int startAddress, quint16 readSize);
+
+	QBitArray getCoilOrder(int startAddress, quint16 readSize, ExpConfig& expConfig);
 	QBitArray getInputCoilOrder(int startAddress, quint16 readSize);
 	QVector<quint16> getHoldingRegisterOrder(int startAddress,
 											 quint16 readSize);
@@ -47,9 +48,6 @@ signals:
 	void setMultipleRegisterOrder(int startAddress,
 								  quint16 writeSize,
 								  QVector<quint16> registerValues);
-	//uncrustify off
-public slots:
-	//uncrustify on
 };
 
 #endif //MODBUSWRAPPER_H
diff --git a/Servo/src/ModbusMaster.cpp b/Servo/src/ModbusMaster.cpp
index 32abdf9..31671a6 100644
--- a/Servo/src/ModbusMaster.cpp
+++ b/Servo/src/ModbusMaster.cpp
@@ -67,7 +67,7 @@ void ModbusMaster::connectionStateChanged(QModbusDevice::State state)
 }
 
 /*************************************************************************************************/
-QBitArray ModbusMaster::getCoil(int startAddress, quint16 readSize)
+QBitArray ModbusMaster::getCoil(int startAddress, quint16 readSize, ExpConfig& expConfig)
 {
 	try
 	{
@@ -89,7 +89,8 @@ QBitArray ModbusMaster::getCoil(int startAddress, quint16 readSize)
 	}
 	catch(const ServoException& ex)
 	{
-		qDebug() << ex.what();
+		expConfig.valid = true;
+		expConfig.message = ex.what();
 	}
 }
 
diff --git a/Servo/src/ModbusWrapper.cpp b/Servo/src/ModbusWrapper.cpp
index a58efe3..756fb3e 100644
--- a/Servo/src/ModbusWrapper.cpp
+++ b/Servo/src/ModbusWrapper.cpp
@@ -83,7 +83,15 @@ void ModbusWrapper::init()
 /*************************************************************************************************/
 QBitArray ModbusWrapper::getCoil(int startAddress, quint16 readSize)
 {
-	return emit getCoilOrder(startAddress, readSize);
+	ExpConfig exp;
+	auto ret = emit getCoilOrder(startAddress, readSize, exp);
+
+	if(exp.valid)
+	{
+		throw ServoException(exp.message);
+	}
+
+	return ret;
 }
 
 /*************************************************************************************************/
diff --git a/Test/MainWindow.cpp b/Test/MainWindow.cpp
index 8fd0208..1133474 100644
--- a/Test/MainWindow.cpp
+++ b/Test/MainWindow.cpp
@@ -46,29 +46,38 @@ void MainWindow::on_readButton_clicked()
 {
 	int startAddress = ui->startAddress->text().toInt();
 	int numberOfEntries = ui->readSize->text().toInt();
-	switch(ui->writeTable->currentData().toInt())
+	try
+	{
+		switch(ui->writeTable->currentData().toInt())
+		{
+			case 0:
+				printCoilsDataFromClient(modbusWrapper.getCoil(startAddress,
+															   static_cast<quint16>(numberOfEntries)));
+				break;
+
+			case 1:
+				printCoilsDataFromClient(modbusWrapper.getInputCoil(startAddress,
+																	static_cast<quint16>(
+																		numberOfEntries)));
+				break;
+
+			case 2:
+				printRegisterDataFromClient(modbusWrapper.getInputRegister(startAddress,
+																		   static_cast<quint16>(
+																			   numberOfEntries)));
+				break;
+
+			case 3:
+				printRegisterDataFromClient(modbusWrapper.getHoldingRegister(startAddress,
+																			 static_cast<quint16>(
+																				 numberOfEntries)));
+				break;
+		}
+	}
+	catch(const ServoException& exp)
 	{
-		case 0:
-			printCoilsDataFromClient(modbusWrapper.getCoil(startAddress,
-														   static_cast<quint16>(numberOfEntries)));
-			break;
-
-		case 1:
-			printCoilsDataFromClient(modbusWrapper.getInputCoil(startAddress,
-																static_cast<quint16>(numberOfEntries)));
-			break;
-
-		case 2:
-			printRegisterDataFromClient(modbusWrapper.getInputRegister(startAddress,
-																	   static_cast<quint16>(
-																		   numberOfEntries)));
-			break;
-
-		case 3:
-			printRegisterDataFromClient(modbusWrapper.getHoldingRegister(startAddress,
-																		 static_cast<quint16>(
-																			 numberOfEntries)));
-			break;
+		qDebug() << "aaaa";
+		qDebug() << exp.what();
 	}
 }