The QModbusRtuSerialMaster class represents a Modbus client that uses a serial bus for its communication with the Modbus server. More...
Header: | #include <QModbusRtuSerialMaster> |
qmake: | QT += serialbus |
Since: | Qt 5.8 |
Inherits: | QModbusClient |
This class was introduced in Qt 5.8.
QModbusRtuSerialMaster(QObject *parent = nullptr) | |
int | interFrameDelay() const |
void | setInterFrameDelay(int microseconds) |
void | setTurnaroundDelay(int turnaroundDelay) |
int | turnaroundDelay() const |
virtual void | close() override |
virtual bool | open() override |
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.
Constructs a serial Modbus master with the specified parent.
[override virtual protected]
void QModbusRtuSerialMaster::close()
Reimplements: QModbusDevice::close().
Returns the amount of microseconds for the silent interval between two consecutive Modbus messages.
See also setInterFrameDelay().
[override virtual protected]
bool QModbusRtuSerialMaster::open()
Reimplements: QModbusDevice::open().
Note: When calling this function, existing buffered data is removed from the serial port.
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.
Note: If microseconds is set to -1 or microseconds is less than the pre-calculated delay then this pre-calculated value is used as frame delay.
See also interFrameDelay().
Sets the amount of milliseconds for the silent interval between a Modbus broadcast and a consecutive Modbus messages to turnaroundDelay. Typically the turnaround delay is in the range of 100
to 200
milliseconds.
This function was introduced in Qt 5.13.
See also turnaroundDelay().
Returns the amount of milliseconds for the silent interval between a Modbus broadcast and a consecutive Modbus messages. The default value is set to 100
milliseconds.
This function was introduced in Qt 5.13.
See also setTurnaroundDelay().
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Licensed under the GNU Free Documentation License, Version 1.3.
https://doc.qt.io/qt-5.15/qmodbusrtuserialmaster.html