net.wimpi.modbus.msg
Class ReadMultipleRegistersRequest

java.lang.Object
  net.wimpi.modbus.msg.ModbusMessageImpl
      net.wimpi.modbus.msg.ModbusRequest
          net.wimpi.modbus.msg.ReadMultipleRegistersRequest

All Implemented Interfaces:

ModbusMessage, Transportable

public final class ReadMultipleRegistersRequest

extends ModbusRequest

Class implementing a ReadMultipleRegistersRequest. The implementation directly correlates with the class 0 function read multiple registers (FC 3). It encapsulates the corresponding request message.

Version:

1.2rc1 (09/11/2004)

Author:

Dieter Wimberger

Constructor Summary

ReadMultipleRegistersRequest()
Constructs a new ReadMultipleRegistersRequest instance.

ReadMultipleRegistersRequest(int ref, int count)
Constructs a new ReadMultipleRegistersRequest instance with a given reference and count of words to be read.

Method Summary

ModbusResponse	createResponse() Returns the ModbusResponse that represents the answer to this ModbusRequest.
int	getReference() Returns the reference of the register to to start reading from with this ReadMultipleRegistersRequest.
int	getWordCount() Returns the number of words to be read with this ReadMultipleRegistersRequest.
void	readData(java.io.DataInput din) Reads the subclass specific data from the given DataInput instance.
void	setReference(int ref) Sets the reference of the register to start reading from with this ReadMultipleRegistersRequest.
void	setWordCount(int count) Sets the number of words to be read with this ReadMultipleRegistersRequest.
void	writeData(java.io.DataOutput dout) Writes the subclass specific data to the given DataOutput.

Methods inherited from class net.wimpi.modbus.msg.ModbusRequest

createExceptionResponse, createModbusRequest

Methods inherited from class net.wimpi.modbus.msg.ModbusMessageImpl

getDataLength, getFunctionCode, getHexMessage, getOutputLength, getProtocolID, getTransactionID, getUnitID, isHeadless, readFrom, setDataLength, setFunctionCode, setHeadless, setHeadless, setProtocolID, setTransactionID, setUnitID, writeTo

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ReadMultipleRegistersRequest

public ReadMultipleRegistersRequest()

Constructs a new ReadMultipleRegistersRequest instance.

ReadMultipleRegistersRequest

public ReadMultipleRegistersRequest(int ref,
                                    int count)

Constructs a new ReadMultipleRegistersRequest instance with a given reference and count of words to be read.

Parameters:

ref - the reference number of the register to read from.

count - the number of words to be read.

Method Detail

createResponse

public ModbusResponse createResponse()

Description copied from class: ModbusRequest

Returns the ModbusResponse that represents the answer to this ModbusRequest.

The implementation should take care about assembling the reply to this ModbusRequest.

Specified by:

createResponse in class ModbusRequest

Returns:

the corresponding ModbusResponse.

setReference

public void setReference(int ref)

Sets the reference of the register to start reading from with this ReadMultipleRegistersRequest.

Parameters:

ref - the reference of the register to start reading from.

getReference

public int getReference()

Returns the reference of the register to to start reading from with this ReadMultipleRegistersRequest.

Returns:

the reference of the register to start reading from as int.

setWordCount

public void setWordCount(int count)

Sets the number of words to be read with this ReadMultipleRegistersRequest.

Parameters:

count - the number of words to be read.

getWordCount

public int getWordCount()

Returns the number of words to be read with this ReadMultipleRegistersRequest.

Returns:

the number of words to be read as int.

writeData

public void writeData(java.io.DataOutput dout)
               throws java.io.IOException

Description copied from class: ModbusMessageImpl

Writes the subclass specific data to the given DataOutput.

Specified by:

writeData in class ModbusMessageImpl

Parameters:

dout - the DataOutput to be written to.

Throws:

java.io.IOException - if an I/O related error occurs.

readData

public void readData(java.io.DataInput din)
              throws java.io.IOException

Description copied from class: ModbusMessageImpl

Reads the subclass specific data from the given DataInput instance.

Specified by:

readData in class ModbusMessageImpl

Parameters:

din - the DataInput to read from.

Throws:

java.io.IOException - if an I/O related error occurs.