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OMF with PI Web API

Changes to make to your OMF application

  • Last UpdatedSep 04, 2025
  • 1 minute read
  1. All the type definitions need to be converted to what PI Web API expects. The relay stores these in a local file in addition to AF Element Templates, but the relay's representation of the AF Element Template differs from how PI Web API represents them.

    1. Relay stores in temp storage on the relay

    2. __Data items are reserved in new implementation

    3. Relay prefixes OMF___

    4. It may be simpler to make a new database

  2. All the AF Elements need to be converted to the form that the PI Web API plugin expects - This might not be possible in a backwards-compatible fashion, due to an issue with PI Point Data Reference attributes.

  3. All the containers need to be converted to the form that the PI Web API plugin expects -The relay has a local file that defines the containers, which should contain the information needed for ingress to Data Archive DA.

  4. Dynamic values should be unaffected

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