com.ghgande.j2mod.modbus.msg

Class ReadCommEventLogRequest

java.lang.Object

com.ghgande.j2mod.modbus.msg.ModbusMessageImpl

com.ghgande.j2mod.modbus.msg.ModbusRequest

com.ghgande.j2mod.modbus.msg.ReadCommEventLogRequest

All Implemented Interfaces:

ModbusMessage

public class ReadCommEventLogRequest
extends ModbusRequest

Class implementing a Read MEI Data request.

Version:

2.0 (March 2016)

Author:

Julie Haugh (jfh@ghgande.com), jfhaugh (jfh@ghgande.com), Steve O'Hara (4NG)

Constructor Summary

Constructors

Constructor and Description
ReadCommEventLogRequest() Constructs a new Get Comm Event Log instance.

Method Summary

Modifier and Type	Method and Description
ModbusResponse	createResponse(AbstractModbusListener listener) Returns the ModbusResponse that represents the answer to this ModbusRequest.
byte[]	getMessage() getMessage
ModbusResponse	getResponse() Returns the ModbusResponse that correlates with this ModbusRequest.
void	readData(DataInput din) readData -- dummy function.
void	writeData(DataOutput dout) writeData -- output this Modbus message to dout.

Methods inherited from class com.ghgande.j2mod.modbus.msg.ModbusRequest

createExceptionResponse, createModbusRequest

Methods inherited from class com.ghgande.j2mod.modbus.msg.ModbusMessageImpl

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ReadCommEventLogRequest

public ReadCommEventLogRequest()

Constructs a new Get Comm Event Log instance.

Method Detail

getResponse

public ModbusResponse getResponse()

Description copied from class: ModbusRequest

Returns the ModbusResponse that correlates with this ModbusRequest.

The response must include the unit number, function code, as well as any transport-specific header information.

This method is used to create an empty response which must be populated by the caller. It is commonly used to un-marshal responses from Modbus slaves.

Specified by:

getResponse in class ModbusRequest

Returns:

the corresponding ModbusResponse.

createResponse

public ModbusResponse createResponse(AbstractModbusListener listener)

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.

This method is used to create responses from the process image associated with the listener. It is commonly used to implement Modbus slave instances.

Specified by:

createResponse in class ModbusRequest

Parameters:

listener - Listener that received the request

Returns:

the corresponding ModbusResponse.

writeData

public void writeData(DataOutput dout)
               throws IOException

writeData -- output this Modbus message to dout.

Specified by:

writeData in class ModbusMessageImpl

Parameters:

dout - the DataOutput to be written to.

Throws:

IOException - If the data cannot be written

readData

public void readData(DataInput din)
              throws IOException

readData -- dummy function. There is no data with the request.

Specified by:

readData in class ModbusMessageImpl

Parameters:

din - the DataInput to read from.

Throws:

IOException - If the data cannot be read

getMessage

public byte[] getMessage()

getMessage

Returns:

an empty array as there is no data for this request