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 |
| QModbusRtuSerialSlave(QObject *parent = nullptr) | |
| virtual | ~QModbusRtuSerialSlave() |
| virtual bool | processesBroadcast() const override |
| virtual void | close() override |
| virtual bool | open() override |
| virtual QModbusResponse | processRequest(const QModbusPdu &request) override |
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().
Constructs a QModbusRtuSerialSlave with the specified parent. The serverAddress preset is 1.
[virtual] 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() constReimplemented from QModbusServer::processesBroadcast().
