Replication run-time operations

Communication between tiers of replication historians may be interrupted because of a network outage or some other reason. When such interruptions occur, the replicated tags can still be configured and the data collected. Then, when communication is restored, the replication configuration and data are sent to the next-tier Historian.

System and data integrity is not guaranteed if a disorderly shutdown occurs, such as a power outage.

Replication for tags will stop if:

• You delete the source tag configuration on the tier-1 Historian.

• You configure the tier-1 tag so that its data values are not stored.

• An integer analog tag is being replicated as a state summary, and you change the source tag to be a real analog tag.