QModbusRtuSerialMaster Class

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

頭：	#include <QModbusRtuSerialMaster>
qmake:	QT += serialbus
Since:	Qt 5.6
繼承：	QModbusClient

所有成員列錶，包括繼承成員

公共函數

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

8 公共函數繼承自 QModbusClient
7 public functions inherited from QModbusDevice
32 公共函數繼承自 QObject

重實現保護函數

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

2 保護函數繼承自 QModbusClient
4 保護函數繼承自 QModbusDevice
9 保護函數繼承自 QObject

額外繼承成員

1 特性繼承自 QModbusClient
1 特性繼承自 QObject
1 公共槽繼承自 QObject
1 信號繼承自 QModbusClient
2 信號繼承自 QModbusDevice
2 信號繼承自 QObject
11 靜態公共成員繼承自 QObject
2 保護函數繼承自 QModbusClient
4 保護函數繼承自 QModbusDevice
9 保護函數繼承自 QObject

詳細描述

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.

成員函數文檔編製

QModbusRtuSerialMaster:: QModbusRtuSerialMaster ( QObject * parent = nullptr)

Constructs a serial Modbus master with the specified parent .

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

重實現自 QModbusDevice::close ().

int QModbusRtuSerialMaster:: interFrameDelay () const

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

該函數在 Qt 5.7 引入。

另請參閱 setInterFrameDelay ().

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

重實現自 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 被設為 -1 或 microseconds is less than the pre-calculated delay then this pre-calculated value is used as frame delay.