diff --git a/README.md b/README.md
index 4725edd..7374ad0 100644
--- a/README.md
+++ b/README.md
@@ -355,6 +355,13 @@ doubleValue: Value to be converted
 register_order: Desired Word Order (Low Register first or High Register first - Default: RegisterOrder.lowHigh  
 return: 16 Bit Register values int[]  
 
+**def convert_quad_to_four_registers(quadValue, register_order=RegisterOrder.lowHigh):
+
+Convert 64 Bit Value to four 16 Bit Value to send as Modbus Registers
+quadValue: Value to be converted
+register_order: Desired Word Order (Low Register first or High Register first - Default: RegisterOrder.lowHigh
+return: 16 Bit Register values int[]
+
 **def convert_float_to_two_registers(floatValue, register_order=RegisterOrder.lowHigh)**
 
 Convert 32 Bit real Value to two 16 Bit Value to send as Modbus Registers  
@@ -362,6 +369,12 @@ floatValue: Value to be converted
 register_order: Desired Word Order (Low Register first or High Register first - Default: RegisterOrder.lowHigh  
 return: 16 Bit Register values int[]  
 
+**def convert_float64_to_four_registers(float64Value, register_order=RegisterOrder.lowHigh):
+
+Convert 64 Bit real Value to two 16 Bit Value to send as Modbus Registers
+floatValue: Value to be converted
+return: 16 Bit Register values int[]
+
 **def convert_registers_to_double(registers, register_order=RegisterOrder.lowHigh)**
 
 Convert two 16 Bit Registers to 32 Bit long value - Used to receive 32 Bit values from Modbus (Modbus Registers are 16 Bit long)  
@@ -369,9 +382,21 @@ registers: 16 Bit Registers
 register_order: Desired Word Order (Low Register first or High Register first - Default: RegisterOrder.lowHigh  
 return: 32 bit value  
 
+def convert_registers_to_quad(registers, register_order=RegisterOrder.lowHigh):
+
+Convert four 16 Bit Registers to 64 Bit long value - Used to receive 64Bit values from Modbus (Modbus Registers are 16 Bit long)
+registers: 16 Bit Registers
+return: 64 bit value
+
 **def convert_registers_to_float(registers, register_order=RegisterOrder.lowHigh)**
 
 Convert two 16 Bit Registers to 32 Bit real value - Used to receive float values from Modbus (Modbus Registers are 16 Bit long)  
 registers: 16 Bit Registers  
 register_order: Desired Word Order (Low Register first or High Register first - Default: RegisterOrder.lowHigh  
-return: 32 bit value real 
\ No newline at end of file
+return: 32 bit value real 
+
+**def convert_registers_to_float64(registers, register_order=RegisterOrder.lowHigh):
+
+Convert two 16 Bit Registers to 64 Bit real value - Used to receive float values from Modbus (Modbus Registers are 16 Bit long)
+registers: 16 Bit Registers
+return: 64 bit value real
diff --git a/easymodbus/modbusClient.py b/easymodbus/modbusClient.py
index 059646a..2570dcd 100644
--- a/easymodbus/modbusClient.py
+++ b/easymodbus/modbusClient.py
@@ -191,7 +191,7 @@ def read_input_registers(self, starting_address, quantity):
         """
         logging.info("Request to read Input Registers (FC04), starting address: {0}, quantity: {1}"
                      .format(str(starting_address), str(quantity)))
-        return_value = self.read_analogs(starting_address, quantity, FunctionCode.READ_INPUT_REGISTERS)
+        return_value = self.execute_read_order(starting_address, quantity, FunctionCode.READ_INPUT_REGISTERS)
         logging.info("Response to Input Registers (FC04), values: {0}"
                      .format(str(return_value)))
         return return_value
@@ -444,14 +444,14 @@ def baudrate(self, baudrate):
     @property
     def parity(self):
         """
-        Gets the of Parity in case of serial connection
+        Gets the value of Parity in case of serial connection
         """
         return self.__parity
 
     @parity.setter
     def parity(self, parity):
         """
-        Sets the of Parity in case of serial connection
+        Sets the value of Parity in case of serial connection
         Example modbusClient.Parity = Parity.even
         """
         self.__parity = parity
@@ -562,6 +562,35 @@ def convert_double_to_two_registers(doubleValue, register_order=RegisterOrder.lo
     return myList
 
 
+def convert_quad_to_four_registers(quadValue, register_order=RegisterOrder.lowHigh):
+    """
+    Convert 64 Bit Value to four 16 Bit Value to send as Modbus Registers
+    quadValue: Value to be converted
+    register_order: Desired Word Order (Low Register first or High Register first - Default: RegisterOrder.lowHigh
+    return: 16 Bit Register values int[]
+    """
+    myList = list()
+
+    # Append Least Significant Word
+    myList.append(int(quadValue & 0x000000000000FFFF))
+    # Append a little bit more Significant Word
+    myList.append(int((quadValue & 0x00000000FFFF0000) >> 16))
+    # Append a bit more Significant Word
+    myList.append(int((quadValue & 0x0000FFFF00000000) >> 32))
+    # Append Most Significant Word
+    myList.append(int((quadValue & 0xFFFF000000000000) >> 48))
+    if register_order == RegisterOrder.highLow:
+        # Append Most Significant Word
+        myList[0] = (int((quadValue & 0xFFFF000000000000) >> 48))
+        # Append a little bit less Significant Word
+        myList[1] = (int((quadValue & 0x0000FFFF00000000) >> 32))
+        # Append a bit less Significant Word
+        myList[2] = (int((quadValue & 0x00000000FFFF0000) >> 16))
+        # Append Least Significant Word
+        myList[3] = (int(quadValue & 0x000000000000FFFF))
+    return myList
+
+
 def convert_float_to_two_registers(floatValue, register_order=RegisterOrder.lowHigh):
     """
     Convert 32 Bit real Value to two 16 Bit Value to send as Modbus Registers
@@ -578,9 +607,30 @@ def convert_float_to_two_registers(floatValue, register_order=RegisterOrder.lowH
     return myList
 
 
+def convert_float64_to_four_registers(float64Value, register_order=RegisterOrder.lowHigh):
+    """
+    Convert 64 Bit real Value to two 16 Bit Value to send as Modbus Registers
+    floatValue: Value to be converted
+    return: 16 Bit Register values int[]
+    """
+    myList = list()
+    s = bytearray(struct.pack('<d', float64Value))  # little endian
+    myList.append(s[0] | (s[1] << 8))  # Append Least Significant Word
+    myList.append(s[2] | (s[3] << 8))  # Append Least + 1 Significant Word
+    myList.append(s[4] | (s[5] << 8))  # Append Most - 1 Significant Word
+    myList.append(s[6] | (s[7] << 8))  # Append Most Significant Word
+    if register_order == RegisterOrder.highLow:
+        myList[0] = s[6] | (s[7] << 8)
+        myList[1] = s[4] | (s[5] << 8)
+        myList[2] = s[2] | (s[3] << 8)
+        myList[3] = s[0] | (s[1] << 8)
+    return myList
+
+
 def convert_registers_to_double(registers, register_order=RegisterOrder.lowHigh):
     """
-    Convert two 16 Bit Registers to 32 Bit long value - Used to receive 32 Bit values from Modbus (Modbus Registers are 16 Bit long)
+    Convert two 16 Bit Registers to 32 Bit long value - 
+    Used to receive 32Bit values from Modbus (Modbus Registers are 16 Bit long)
     registers: 16 Bit Registers
     return: 32 bit value
     """
@@ -590,9 +640,24 @@ def convert_registers_to_double(registers, register_order=RegisterOrder.lowHigh)
     return returnValue
 
 
+def convert_registers_to_quad(registers, register_order=RegisterOrder.lowHigh):
+    #TODO: TEST IF SIGNED OR UNSIGNED
+    """
+    Convert two 16 Bit Registers to 64 Bit long value - 
+    Used to receive 64Bit values from Modbus (Modbus Registers are 16 Bit long)
+    registers: 16 Bit Registers
+    return: 64 bit value
+    """
+    returnValue = (int(registers[0]) & 0x000000000000FFFF) | (int((registers[1]) << 16) & 0x00000000FFFF0000) | (int((registers[2]) << 32) & 0x0000FFFF00000000) | (int((registers[3]) << 48) & 0xFFFF000000000000)
+    if register_order == RegisterOrder.highLow:
+        returnValue = (int(registers[3]) & 0x000000000000FFFF) | (int((registers[2]) << 16) & 0x00000000FFFF0000) | (int((registers[1]) << 32) & 0x0000FFFF00000000) | (int((registers[0]) << 48) & 0xFFFF000000000000)
+    return returnValue
+
+
 def convert_registers_to_float(registers, register_order=RegisterOrder.lowHigh):
     """
-    Convert two 16 Bit Registers to 32 Bit real value - Used to receive float values from Modbus (Modbus Registers are 16 Bit long)
+    Convert two 16 Bit Registers to 32 Bit real value - 
+    Used to receive float values from Modbus (Modbus Registers are 16 Bit long)
     registers: 16 Bit Registers
     return: 32 bit value real
     """
@@ -610,6 +675,34 @@ def convert_registers_to_float(registers, register_order=RegisterOrder.lowHigh):
     return returnValue
 
 
+def convert_registers_to_float64(registers, register_order=RegisterOrder.lowHigh):
+    """
+    Convert two 16 Bit Registers to 64 Bit real value - Used to receive float values from Modbus (Modbus Registers are 16 Bit long)
+    registers: 16 Bit Registers
+    return: 64 bit value real
+    """
+    b = bytearray(8)
+    b[0] = registers[0] & 0xff
+    b[1] = (registers[0] & 0xff00) >> 8
+    b[2] = (registers[1] & 0xff)
+    b[3] = (registers[1] & 0xff00) >> 8
+    b[4] = (registers[2] & 0xff)
+    b[5] = (registers[2] & 0xff00) >> 8
+    b[6] = (registers[3] & 0xff)
+    b[7] = (registers[3] & 0xff00) >> 8
+    if register_order == RegisterOrder.highLow:
+        b[6] = registers[0] & 0xff
+        b[7] = (registers[0] & 0xff00) >> 8
+        b[4] = registers[0] & 0xff
+        b[5] = (registers[0] & 0xff00) >> 8
+        b[2] = registers[0] & 0xff
+        b[3] = (registers[0] & 0xff00) >> 8
+        b[0] = (registers[1] & 0xff)
+        b[1] = (registers[1] & 0xff00) >> 8
+    returnValue = struct.unpack('<d', b)  # little Endian
+    return returnValue
+
+
 if __name__ == "__main__":
     modbus_client = ModbusClient('10.211.55.3', 502)
     modbus_client.debug = True
diff --git a/easymodbus/modbus_protocol.py b/easymodbus/modbus_protocol.py
index c832f39..64f6999 100644
--- a/easymodbus/modbus_protocol.py
+++ b/easymodbus/modbus_protocol.py
@@ -78,7 +78,8 @@ def decode(self, data: bytearray):
 @dataclass
 class PDU:
     """
-    Dataclass which represents the PDU (Protocol Data Unit) - Both for Modbus RTU and Modbus TCP
+    Dataclass which represents the PDU (Protocol Data Unit) 
+    - Both for Modbus RTU and Modbus TCP
     function_code(1 Byte): Service specified by the Function code
     """
     function_code: FunctionCode = FunctionCode.READ_COILS
@@ -96,7 +97,7 @@ def decode(self, data):
             if exception_code == 1:
                 raise Exceptions.function_codeNotSupportedException("Function code not supported by master")
             elif exception_code == 2:
-                raise Exceptions.starting_addressInvalidException(
+                raise Exceptions.StartingAddressInvalidException(
                     "Starting address invalid or starting address + quantity invalid")
             elif exception_code == 3:
                 raise Exceptions.QuantityInvalidException("quantity invalid")
@@ -108,7 +109,8 @@ def decode(self, data):
 @dataclass
 class ADU:
     """
-    Dataclass which represents the ADU (Application Data Unit) - Both for Modbus RTU and Modbus TCP
+    Dataclass which represents the ADU (Application Data Unit) 
+    - Both for Modbus RTU and Modbus TCP
     mbap_header: only relevant for Modbus TCP
     pdu: both for Modbus TCP and RTU
     crc: Error check only relevant for Modbus RTU
@@ -158,4 +160,4 @@ def __calculateCRC(self, data, numberOfBytes, startByte):
                     crc = crc ^ 0xA001
                 else:
                     crc = crc >> 1
-        return crc
\ No newline at end of file
+        return crc
diff --git a/easymodbus/run.py b/easymodbus/run.py
index 9d5dfa2..b113a03 100644
--- a/easymodbus/run.py
+++ b/easymodbus/run.py
@@ -6,7 +6,7 @@
 '''
 
 # @UnresolvedImport
-from modbusClient import *
+from easymodbus.modbusClient import *
 # @UnresolvedImport
     
 modbusClient = ModbusClient('127.0.0.1', 502)
@@ -30,4 +30,4 @@
 modbusClient.write_single_register(0, 777)
 modbusClient.write_multiple_coils(0, [True,True,True,True,True,False,True,True])
 modbusClient.write_multiple_registers(0, convert_float_to_two_registers(3.141517))
-modbusClient.close()
\ No newline at end of file
+modbusClient.close()