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PI Interface for Universal File and Stream Loading UFL

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Dynamic OMF Health Data

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  • Last UpdatedMar 05, 2025
  • 1 minute read

OMF Health Messaging enables interface functionality that sends status information to a configured OMF endpoint, providing a history of interface operation. The following table shows that two objects are established to store String and DateTime values for OMF health.

PI Point/CONNECT data services stream

Data type

Description

DeviceStatus

String

  • On Startup

  • On change

  • On Shutdown

  • On each performance summary interval

NextHealthMessageExpected

DateTime

  • If there are no scan classes defined, the heartbeat updates once per second.

  • If one or more scan classes are defined for the interface, the heartbeat updates at the rate of the most frequently updating scan class or one minute, whichever is faster.

  • If the endpoint type is PIWebAPI then the DeviceStatus and NextHealthMessageExpected are created as points in PI Server.

  • If the endpoint type is CONNECT data services, then these two objects become streams in the CONNECT data services data store.

  • The names of both PI points and CONNECT data services streams have the following pattern:

    HostName.ServiceName.DeviceStatus

    and

    HostName.ServiceName.NextHealthMessageExpected

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