Emerson Exchange 365

In reply to tasai:

You do not need DeltaV Zones to synchronize two DeltaV systems with the same NTP server. Zones are used to exchange larger amounts of data between multiple DeltaV systems and to provide a common operator graphical interface across DeltaV systems. A graphic with I/O and logic in Zone A can be displayed (and optionally controlled) in Zone B's operator interface with the same graphic.

The Symmetricom NTP appliance has three interfaces. In a single DeltaV system. you would typically connect two of the interfaces to the DeltaV Primary and Secondary ACNs. The third interface would optionally be connected to the third "Plant LAN" interface. You cannot connect the DeltaV ACNs between two systems due to IP conflicts, so you would need to decide which DeltaV system will have an NTP server available on two interfaces (DeltaV Primary and Secondary) and which one will have a single NTP connection on the "Plant LAN" interface.