The Events in Buffer PLC Tag allows monitoring the presence of data in the internal buffer of this Driver. This PLC Tag can be used to avoid loosing events when closing an application. If it is important to avoid loosing events that remain in the internal buffer when closing an application, users must halt the internal scan, by setting this Driver to the Offline mode before closing it, and leaving the automatic scanning of Tags enabled. Thus, new events are not added to the buffer while automatic scanning Tags process the remaining events. Wait for the Events in Buffer PLC Tag to return to 0 (zero) and then close this Driver safely, without loosing events.