Hello, if the CORE is on stock, PLC project and licences remain stored on the device. The battery will wear out slwoly. When the battery is empty, the clock (time) is lost and the certificates are lost. That means, after a long time on stock: "check the battery, maybee replace it (otherwise the CORE light pipe will be yellow) and set the time again". The rest PLC, licences, etc... is still there!
It is recommanded to change the battery every three years.
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