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Parallels client timeout software#
The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. See also setTimeout and timeoutChanged().ĭocumentation contributions included herein are the copyrights of
A timeout is indicated by a TimeoutError. Returns the timeout value used by this QModbusClient instance in ms. If the response is not received within the required timeout, the TimeoutError is set.Īlready active/running timeouts are not affected by such timeout duration changes. The timeout is used by the client to determine how long it waits for a response from the server. Sets the newTimeout for this QModbusClient instance. void QModbusClient:: setTimeout( int newTimeout) Changing this property will only effect new requests, not already scheduled ones. Note: The new value must be greater than or equal to 0. Modbus network may have multiple servers, each server has unique serverAddress. Returns a new valid QModbusReply object if no error occurred, otherwise nullptr.
Parallels client timeout code#
Sends a request to read the contents of the data pointed by read and to modify the contents of the data pointed by write using Modbus function code QModbusPdu::ReadWriteMultipleRegisters. QModbusReply *QModbusClient:: sendReadWriteRequest(const QModbusDataUnit & read, const QModbusDataUnit & write, int serverAddress) Sends a request to read the contents of the data pointed by read. QModbusReply *QModbusClient:: sendReadRequest(const QModbusDataUnit & read, int serverAddress) Modbus networks may have multiple servers, each server has a unique serverAddress. If no error occurred the function returns a a new valid QModbusReply nullptr otherwise. The only check performed before sending is therefore the validity check, see QModbusPdu::isValid. A raw request can contain anything that fits inside the Modbus PDU data section and has a valid function code. QModbusReply *QModbusClient:: sendRawRequest(const QModbusRequest & request, int serverAddress) Processes a Modbus server response and stores the decoded information in data. bool QModbusClient:: processResponse(const QModbusResponse & response, QModbusDataUnit * data) It always returns false to indicate error. The default implementation ignores response and data. To be implemented by custom Modbus client implementation. bool QModbusClient:: processPrivateResponse(const QModbusResponse & response, QModbusDataUnit * data) Returns the number of retries a client will perform before a request fails. int QModbusClient:: numberOfRetries() const The new response timeout for the device is passed as newTimeout.
This signal is emitted when the timeout used by this QModbusClient instance is changed.
void QModbusClient:: timeoutChanged( int newTimeout) Member Function Documentation QModbusClient:: QModbusClient( QObject * parent = nullptr)Ĭonstructs a Modbus client device with the specified parent.
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