QOpcUaHistoryReadResponse#
This class is used for requesting historical data and storing the results. More…
New in version 6.3.
Synopsis#
Functions#
def
data()def
hasMoreData()def
readMoreData()def
releaseContinuationPoints()def
serviceResult()def
state()
Signals#
def
readHistoryDataFinished(results, serviceResult)def
stateChanged(state)
Note
This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE
Detailed Description#
A historical data request to an OPC UA server can be specified by a QOpcUaHistoryReadRawRequest .
Objects of this class and the statuscode of the request are returned in the UaStatusCode serviceResult) signal and contain the result of a request.
- class PySide6.QtOpcUa.QOpcUaHistoryReadResponse#
- PySide6.QtOpcUa.QOpcUaHistoryReadResponse.State#
This enum specifies the state the response is in.
Constant
Description
QOpcUaHistoryReadResponse.State.Unknown
QOpcUaHistoryReadResponse.State.Reading
QOpcUaHistoryReadResponse.State.Finished
QOpcUaHistoryReadResponse.State.MoreDataAvailable
QOpcUaHistoryReadResponse.State.Error
- PySide6.QtOpcUa.QOpcUaHistoryReadResponse.data()#
- Return type:
Returns a list which contains the requested historic data.
- PySide6.QtOpcUa.QOpcUaHistoryReadResponse.hasMoreData()#
- Return type:
bool
Returns true if there are more values available from the historic data request.
- PySide6.QtOpcUa.QOpcUaHistoryReadResponse.readHistoryDataFinished(results, serviceResult)#
- Parameters:
results –
serviceResult –
UaStatusCode
This signal is emitted when a historical data request is finished. It adds to results and sets serviceResult to indicate the state of the result.
See also
- PySide6.QtOpcUa.QOpcUaHistoryReadResponse.readMoreData()#
- Return type:
bool
Returns true if a read request for more historic values is successfully dispatched.
- PySide6.QtOpcUa.QOpcUaHistoryReadResponse.releaseContinuationPoints()#
- Return type:
bool
Releases the continuation points and sets the request as finished. Returns true if the pending request has been successfully finished; otherwise returns false.
- PySide6.QtOpcUa.QOpcUaHistoryReadResponse.serviceResult()#
- Return type:
Returns the serviceresult of the historic data request.
Returns the current state of historic data request.
This signal is emitted when the of a historical data request is changed. It sets state to indicate the state of the change.