A freely selectable part of the “Ev-Upd” objects, or alternatively all objects can be added to the DNP3 analog input data memory map. These objects can also be enabled for DNP3 class events. Each time a new fault record capture is done by the protection relay, the objects are sent as DNP3 class events to the controlling station. Every object captured at the same time (belonging to the same record) has the same time tag. The controlling station can also, at any time, read fault record objects from the outstation. The most recent (newest) captured value is always returned.
The deadband setting for the “Ev-Upd” objects should be “0”. This means that every update of the object from the protection relay level is propagated as a DNP3 class event, regardless of the change in value. As a default setting, all analog inputs have deadband setting of 0.0, that is, the event is always reported when a system event is generated. In the fault record, the next captured value can be identical to the previous one, therefore the recommended deadband value is 0.0.