QModbusRtuSerialMaster Class

The QModbusRtuSerialMaster class represents a Modbus client that uses a serial bus for its communication with the Modbus server. 更多...

头：	#include <QModbusRtuSerialMaster>
qmake:	QT += serialbus
Since:	Qt 5.6
继承：	QModbusClient

所有成员列表，包括继承成员

公共函数

	QModbusRtuSerialMaster (QObject * parent = nullptr)
int	interFrameDelay () const
void	setInterFrameDelay (int microseconds )

8 公共函数继承自 QModbusClient
7 public functions inherited from QModbusDevice
32 公共函数继承自 QObject

重实现保护函数

virtual void	close () override
virtual bool	open () override

2 保护函数继承自 QModbusClient
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 QModbusClient
1 特性继承自 QObject
1 公共槽继承自 QObject
1 信号继承自 QModbusClient
2 信号继承自 QModbusDevice
2 信号继承自 QObject
11 静态公共成员继承自 QObject
2 保护函数继承自 QModbusClient
4 保护函数继承自 QModbusDevice
9 保护函数继承自 QObject

详细描述

The QModbusRtuSerialMaster class represents a Modbus client that uses a serial bus for its communication with the Modbus server.

Communication via Modbus requires the interaction between a single Modbus client instance and multiple Modbus servers. This class provides the client implementation via a serial port.

成员函数文档编制

QModbusRtuSerialMaster:: QModbusRtuSerialMaster ( QObject * parent = nullptr)

Constructs a serial Modbus master with the specified parent .

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

重实现自 QModbusDevice::close ().

int QModbusRtuSerialMaster:: interFrameDelay () const

Returns the amount of microseconds for the silent interval between two consecutive Modbus messages.

该函数在 Qt 5.7 引入。

另请参阅 setInterFrameDelay ().

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

重实现自 QModbusDevice::open ().

注意： When calling this function, existing buffered data is removed from the serial port.

void QModbusRtuSerialMaster:: setInterFrameDelay ( int microseconds )

Sets the amount of microseconds for the silent interval between two consecutive Modbus messages. By default, the class implementation will use a pre-calculated value according to the Modbus specification. A active or running connection is not affected by such delay changes.

注意： 若 microseconds is set to -1 or microseconds is less than the pre-calculated delay then this pre-calculated value is used as frame delay.