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PI Interface for OPC Alarms and Events

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Buffering for PI Interfaces

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  • Last UpdatedOct 20, 2026
  • 1 minute read

The interface node uses buffering to prevent data loss when PI Data Archive is not available. UniInt interfaces can buffer data to store point values when network communication to the PI Data Archive is unavailable. UniInt disconnected startup requires buffering, and it is highly recommended for failover.

Buffering for interfaces is configured and enabled through PI ICU.