PI point attributes

Some PI point attribute configurations are specific to PI Interface for OPC DA points, while others are common to all points. For additional information about PI point configurations, see the PI Universal Interface (UniInt) User Guide, and the PI Server System Management Guide.

Note: Data loss can occur for Event Points ( ExDesc contains event='trigger_tag_name' condition) if the connection to the PI Server is lost. The interface signs up for events from Update Manager for the source points configured for the Event Points. When there is no connection, the source point data cannot be sent to PI, nor can updates be received from the Update Manager for the Event Points. Thus, Event Points will not be updated during the time period when connectivity is lost, nor can data be recovered during the period of lost connectivity