The DeltaV Zones environment supports viewing alarms and recording events between zones. This section explains the configuration and setup required to accomplish Inter-Zone alarm viewing and event recording. This section also explains how alarms and events from other zones appear in DeltaV applications. For Inter-Zone alarm and event viewing and recording, all connected zones must be in the same time zone.
Timestamps for Inter-Zone alarms and events are always taken from the source node where the event is generated. For example, if ZONE_B records events in the ZONE_A system, the timestamp of these events is the time in ZONE_A.
Timestamps displayed in Operator Applications (Operate, Event Chronicle) are always from the time from the zone in which the alarm or event originated. This is true for other user actions such as alarm suppression and alarm acknowledgement.
If it is important in your DeltaV Zones system that time is synchronized between zones (to correct for time differences in system clocks, for example), you must address this in your installation. One way to do this would be to include a Network Time Server in each zone and ensure that they are synchronized (using a GPS device, for example).
Familiarize yourself with DeltaV Zones general information before continuing in this section.