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OPC UA Alarms history

MemyselfandjacquesMemyselfandjacques
in PLCnext Engineer

Good day,

I am busy with a project on a AXF F 2152 controller and using UaExpert client to communicate via OPC UA. I have OPC UA alarms and events working and also able to fetch historical data from the datalogger in the controller.

My question is if it is possible to have historical alarms and events in the controller in case of a connection loss with the OPC UA client. I can't find anything that tells me it is possible to record OPC UA alarms in the same way as variables being logged in the datalogger.

Jacques

Comments

  • Eduard PLCnext TeamEduard PLCnext Team
    edited May 2022

    Hello Jacques,

    the notifications/alarms will be logged by Notification Logger in a separate database, please find the detailed description under Alarms (plcnext.help). The notifications/alarms are displayed in PLCnext Engineer and in the Web-based Management on the controller (see Notification Logger (plcnext.help)).

    The OPC historical data (Variables) will be logged by IDataLogger Service and OPC UA Client uses the IDataLogger Service API for access to logged data.

    BR Eduard

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