QModbusRtuSerialSlave Class
The QModbusRtuSerialSlave class represents a Modbus server that uses a serial port for its communication with the Modbus client. More...
| Header: | #include <QModbusRtuSerialSlave> |
| qmake: | QT += serialbus |
| Since: | Qt 5.8 |
| Inherits: | QModbusServer |
Public Functions
| QModbusRtuSerialSlave(QObject *parent = nullptr) | |
| ~QModbusRtuSerialSlave() |
Reimplemented Public Functions
| virtual bool | processesBroadcast() const override |
- 10 public functions inherited from QModbusServer
- 7 public functions inherited from QModbusDevice
- 31 public functions inherited from QObject
Reimplemented Protected Functions
| virtual void | close() override |
| virtual bool | open() override |
| virtual QModbusResponse | processRequest(const QModbusPdu &request) override |
- 4 protected functions inherited from QModbusServer
- 4 protected functions inherited from QModbusDevice
- 9 protected functions inherited from QObject
Additional Inherited Members
- 1 property inherited from QObject
- 1 public slot inherited from QObject
- 1 signal inherited from QModbusServer
- 2 signals inherited from QModbusDevice
- 2 signals inherited from QObject
- 11 static public members inherited from QObject
- 4 protected functions inherited from QModbusServer
- 4 protected functions inherited from QModbusDevice
- 9 protected functions inherited from QObject
Detailed Description
The QModbusRtuSerialSlave class represents a Modbus server that uses a serial port for its communication with the Modbus client.
Communication via Modbus requires the interaction between a single Modbus client instance and multiple Modbus server. This class provides the Modbus server implementation via a serial port.
Since multiple Modbus server instances can interact with a Modbus client at the same time (using a serial bus), servers are identified by their serverAddress().
Member Function Documentation
QModbusRtuSerialSlave::QModbusRtuSerialSlave(QObject *parent = nullptr)
Constructs a QModbusRtuSerialSlave with the specified parent. The serverAddress preset is 1.
QModbusRtuSerialSlave::~QModbusRtuSerialSlave()
Destroys the QModbusRtuSerialSlave instance.
[override virtual protected] void QModbusRtuSerialSlave::close()
Reimplemented from QModbusDevice::close().
[override virtual protected] bool QModbusRtuSerialSlave::open()
Reimplemented from QModbusDevice::open().
Note: When calling this function, existing buffered data is removed from the serial port.
[override virtual protected] QModbusResponse QModbusRtuSerialSlave::processRequest(const QModbusPdu &request)
Reimplemented from QModbusServer::processRequest().
Processes the Modbus client request specified by request and returns a Modbus response.
The Modbus function QModbusRequest::EncapsulatedInterfaceTransport with MEI Type 13 (0x0D) CANopen General Reference is filtered out because it is usually Modbus TCP or Modbus serial ASCII only.
A request to the RTU serial slave will be answered with a Modbus exception response with the exception code QModbusExceptionResponse::IllegalFunction.
[override virtual] bool QModbusRtuSerialSlave::processesBroadcast() const
Reimplemented from QModbusServer::processesBroadcast().
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