A workstation records alarms and events for the areas listed under the Alarms and Events subsystem. It is practical to record alarms and events for the areas that match the operator span of control. If an operator on Op_Station_1 has control of Areas 1, 2 and 3, these areas should probably be included in the Alarms and Events Subsystem on Op_Station_1 . This allows the operator to view and query events records quickly on the local machine, without having to see records from other areas or connect to another system to view records.
In order for alarms and events to be recorded for the entire system, AREA_A must be assigned to the ProfessionalPLUS, all Operator stations, and any Remote Client sessions configured on these workstations.
A configuration like the one shown below enables operators to view and query records within their span of control on their local machine while enabling anyone to view or query all records by connecting to the ProfessionalPLUS workstation.