How does the "Default DA View" update the values of displayed variables?

[ChSch]

I modeled a device with the uaModeler. The device has the following variable:
OpcUa::BaseDataVariableType* m_pOUT;

This function is used to set the variable value.

Code: Select all

void DeviceInputTypeBase::setOUT(const UaVariant&OUT)
{
    UaVariant value;
    value = OUT;
    UaDataValue dataValue;
    dataValue.setValue(value, OpcUa_True, OpcUa_True);
    m_pOUT->setValue(NULL, dataValue, OpcUa_False);
}

I generate every second a new test input in the shutdown loop. (like in the Server Hello World tutorial)[br]


So, does the uaExpert Client read the values via change notifications or via polling?[br]

Best regards

[Support Team]

Hello,

the DA view creates a MonitoredItem for each NodeId that is dropped into it and displays the values being delivered with DataChangeNotifications.

Best regards,
Unified Automation Support Team

[ChSch]

Nice,

Thank you very much for the information.

[Support Team]

This topic is solved and has been locked by the administrator.