Datastore will not return ExceptionResponse. (#2175)

Author: janiversen

pymodbus/bit_read_message.py

@@ -11,8 +11,8 @@
 # pylint: disable=missing-type-doc
 import struct
 
-from pymodbus.pdu import ExceptionResponse, ModbusRequest, ModbusResponse
 from pymodbus.pdu import ModbusExceptions as merror
+from pymodbus.pdu import ModbusRequest, ModbusResponse
 from pymodbus.utilities import pack_bitstring, unpack_bitstring
 
 
@@ -172,8 +172,6 @@ async def execute(self, context):
         values = await context.async_getValues(
             self.function_code, self.address, self.count
         )
-        if isinstance(values, ExceptionResponse):
-            return values
         return ReadCoilsResponse(values)
 
 
@@ -242,8 +240,6 @@ async def execute(self, context):
         values = await context.async_getValues(
             self.function_code, self.address, self.count
         )
-        if isinstance(values, ExceptionResponse):
-            return values
         return ReadDiscreteInputsResponse(values)
 
 

pymodbus/bit_write_message.py

@@ -92,8 +92,6 @@ async def execute(self, context):
 
         await context.async_setValues(self.function_code, self.address, [self.value])
         values = await context.async_getValues(self.function_code, self.address, 1)
-        # if isinstance(values, ExceptionResponse):
-        #    return values
         return WriteSingleCoilResponse(self.address, values[0])
 
     def get_response_pdu_size(self):

pymodbus/register_read_message.py

@@ -13,8 +13,8 @@
 # pylint: disable=missing-type-doc
 import struct
 
-from pymodbus.pdu import ExceptionResponse, ModbusRequest, ModbusResponse
 from pymodbus.pdu import ModbusExceptions as merror
+from pymodbus.pdu import ModbusRequest, ModbusResponse
 
 
 class ReadRegistersRequestBase(ModbusRequest):
@@ -143,7 +143,7 @@ async def execute(self, context):
         """Run a read holding request against a datastore.
 
         :param context: The datastore to request from
-        :returns: An initialized :py:class:`~pymodbus.register_read_message.ReadHoldingRegistersResponse`, or an :py:class:`~pymodbus.pdu.ExceptionResponse` if an error occurred
+        :returns: An initialized :py:class:`~pymodbus.register_read_message.ReadHoldingRegistersResponse`
         """
         if not (1 <= self.count <= 0x7D):
             return self.doException(merror.IllegalValue)
@@ -152,9 +152,6 @@ async def execute(self, context):
         values = await context.async_getValues(
             self.function_code, self.address, self.count
         )
-        if isinstance(values, ExceptionResponse):
-            return values
-
         return ReadHoldingRegistersResponse(values)
 
 
@@ -206,7 +203,7 @@ async def execute(self, context):
         """Run a read input request against a datastore.
 
         :param context: The datastore to request from
-        :returns: An initialized :py:class:`~pymodbus.register_read_message.ReadInputRegistersResponse`, or an :py:class:`~pymodbus.pdu.ExceptionResponse` if an error occurred
+        :returns: An initialized :py:class:`~pymodbus.register_read_message.ReadInputRegistersResponse`
         """
         if not (1 <= self.count <= 0x7D):
             return self.doException(merror.IllegalValue)
@@ -215,8 +212,6 @@ async def execute(self, context):
         values = await context.async_getValues(
             self.function_code, self.address, self.count
         )
-        if isinstance(values, ExceptionResponse):
-            return values
         return ReadInputRegistersResponse(values)
 
 
@@ -318,7 +313,7 @@ async def execute(self, context):
         """Run a write single register request against a datastore.
 
         :param context: The datastore to request from
-        :returns: An initialized :py:class:`~pymodbus.register_read_message.ReadWriteMultipleRegistersResponse`, or an :py:class:`~pymodbus.pdu.ExceptionResponse` if an error occurred
+        :returns: An initialized :py:class:`~pymodbus.register_read_message.ReadWriteMultipleRegistersResponse`
         """
         if not (1 <= self.read_count <= 0x07D):
             return self.doException(merror.IllegalValue)

pymodbus/register_write_message.py

@@ -12,8 +12,8 @@
 # pylint: disable=missing-type-doc
 import struct
 
-from pymodbus.pdu import ExceptionResponse, ModbusRequest, ModbusResponse
 from pymodbus.pdu import ModbusExceptions as merror
+from pymodbus.pdu import ModbusRequest, ModbusResponse
 
 
 class WriteSingleRegisterRequest(ModbusRequest):
@@ -334,8 +334,6 @@ async def execute(self, context):
         if not context.validate(self.function_code, self.address, 1):
             return self.doException(merror.IllegalAddress)
         values = (await context.async_getValues(self.function_code, self.address, 1))[0]
-        if isinstance(values, ExceptionResponse):
-            return values
         values = (values & self.and_mask) | (self.or_mask & ~self.and_mask)
         await context.async_setValues(
             self.function_code, self.address, [values]