biz.aQute.modbus.api

Class ApplicationProtocol

java.lang.Object

biz.aQute.modbus.api.ApplicationProtocol

Direct Known Subclasses:

MessagingProtocol, SerialProtocol

public abstract class ApplicationProtocol
extends java.lang.Object

This class provides the commands for the Modbus ADU. The ADO is a structure with a command and then command specific parameters.

Field Summary

Fields

Modifier and Type	Field and Description
boolean	bigWordEndian
static int	MAXIMUM_ADU_LENGTH
static int	MINIMUM_ADU_LENGTH

Constructor Summary

Constructors

Constructor and Description
ApplicationProtocol(boolean bigWordEndian)

Method Summary

Modifier and Type	Method and Description
java.io.Closeable	addUnit(int address, Unit unit)
protected abstract PDU	getRequestPDU()
java.util.Set<java.lang.Integer>	getUnitAddresses()
boolean	indication(PDU buffer, int address, PDU response)
PDU	readCoils(Server transport, int unit, int start, int length)
PDU	readDiscreteInputs(Server transport, int unit, int start, int length)
PDU	readHoldingRegisters(Server transport, int unit, int start, int length)
protected abstract PDU	send(PDU buffer, Server server)
java.lang.String	validate(PDU buffer) Check if the buffer is a valid Application DU
PDU	writeMultipleRegisters(Server transport, int unit, int start, int... value)
PDU	writeSingleRegister(Server transport, int unit, int start, int value)

Methods inherited from class java.lang.Object

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

Field Detail

MINIMUM_ADU_LENGTH

public static final int MINIMUM_ADU_LENGTH

See Also:

Constant Field Values

MAXIMUM_ADU_LENGTH

public static final int MAXIMUM_ADU_LENGTH

See Also:

Constant Field Values

bigWordEndian

public final boolean bigWordEndian

Constructor Detail

ApplicationProtocol

public ApplicationProtocol(boolean bigWordEndian)

Method Detail

addUnit

public java.io.Closeable addUnit(int address,
                                 Unit unit)

validate

public java.lang.String validate(PDU buffer)

Check if the buffer is a valid Application DU

indication

public boolean indication(PDU buffer,
                          int address,
                          PDU response)

readCoils

public PDU readCoils(Server transport,
                     int unit,
                     int start,
                     int length)

readDiscreteInputs

public PDU readDiscreteInputs(Server transport,
                              int unit,
                              int start,
                              int length)

readHoldingRegisters

public PDU readHoldingRegisters(Server transport,
                                int unit,
                                int start,
                                int length)

getRequestPDU

protected abstract PDU getRequestPDU()

send

protected abstract PDU send(PDU buffer,
                            Server server)

writeSingleRegister

public PDU writeSingleRegister(Server transport,
                               int unit,
                               int start,
                               int value)
                        throws java.lang.Exception

Throws:

java.lang.Exception

writeMultipleRegisters

public PDU writeMultipleRegisters(Server transport,
                                  int unit,
                                  int start,
                                  int... value)
                           throws java.lang.Exception

Throws:

java.lang.Exception

getUnitAddresses

public java.util.Set<java.lang.Integer> getUnitAddresses()