QModbusTcpServer Class

The QModbusTcpServer class represents a Modbus server that uses a TCP server for its communication with the Modbus client. 更多...

头：	#include <QModbusTcpServer>
qmake:	QT += serialbus
Since:	Qt 5.8
继承：	QModbusServer

公共函数

	QModbusTcpServer (QObject * parent = nullptr)
virtual	~QModbusTcpServer ()

10 公共函数继承自 QModbusServer
7 public functions inherited from QModbusDevice
31 公共函数继承自 QObject

静态公共成员

const QMetaObject

staticMetaObject

9 静态公共成员继承自 QObject

重实现保护函数

virtual void	close () override
virtual bool	open () override
virtual QModbusResponse	processRequest (const QModbusPdu & request ) override

4 保护函数继承自 QModbusServer
4 保护函数继承自 QModbusDevice
9 保护函数继承自 QObject

额外继承成员

1 特性继承自 QObject
1 公共槽继承自 QObject
1 信号继承自 QModbusServer
2 信号继承自 QModbusDevice
2 信号继承自 QObject
4 保护函数继承自 QModbusServer
4 保护函数继承自 QModbusDevice
9 保护函数继承自 QObject

详细描述

The QModbusTcpServer class represents a Modbus server that uses a TCP server for its communication with the Modbus client.

Communication via Modbus requires the interaction between a single Modbus client instance and single Modbus server. This class provides the Modbus server implementation via a TCP server.

Modbus TCP networks can have multiple servers. Servers are read/written by a client device represented by QModbusTcpClient .

成员函数文档编制

QModbusTcpServer:: QModbusTcpServer ( QObject * parent = nullptr)

构造 QModbusTcpServer 采用指定 parent 。 serverAddress preset is 255 .

`[虚拟]` QModbusTcpServer:: ~QModbusTcpServer ()

销毁 QModbusTcpServer 实例。

`[override virtual protected]` void QModbusTcpServer:: close ()

重实现自 QModbusDevice::close ().

`[override virtual protected]` bool QModbusTcpServer:: open ()

重实现自 QModbusDevice::open ().

`[override virtual protected]` QModbusResponse QModbusTcpServer:: processRequest (const QModbusPdu & request )

重实现自 QModbusServer::processRequest ().

Processes the Modbus client request specified by request and returns a Modbus response.

The following Modbus function codes are filtered out as they are serial line only according to the Modbus Application Protocol Specification 1.1b:

A request to the TCP server will be answered with a Modbus exception response with the exception code QModbusExceptionResponse::IllegalFunction .

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