Ignition implementation of DNP Protocol lacks the support for Object 2 - Binary Input Event with Time and for Object 32 - Analogue Input Event with Time.
More precisely Object 2: Variations 0, 2, and 3 as well Object 32: Variations 9, 3, 4 and 7.
When this functionality will be available ?
There is a great necessity for Event acquisition with time for DNP applications specially for Energy sector.
So, since the event with timestamp can be acquired by the implemented DNP protocol, Ignition will backfill a trend (easychart) or the database (historian) with the buffered events received from the Outstation when communication resumes.
I've found it much more reliable to address my DNP3 objects based on the integrity polls and browsing in OPC Quick Client or creating a tag from an object in Designer's OPC Browse.
I often have to change the tag data type in Ignition and do a quick test (e.g. it goes to Int when it's defined as Float in the PLC and the object/variant) but it's more consistent to do this than try to bother with the chart in the docs shown above which doesn't seem to match up on our points list macro's objects/variation output either.