Definition
The Object Historian allows the operator to view past events in the monitored process. The operator can view four different event types in the Object Historian:
Use
The Object Historian is a supplement to the traditional tools available to the operator. LOG and BCL data can also be viewed in a graph, alarm data can be seen in the Alarm List.
But the Object Historian binds all these data types together and provides a full chronological picture of the events in the process, including information about which user was logged in at the time in question.