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• Step 1 - Configuration
  • Parameters that define the configuration of the export service and are managed through Export Client API calls:
    • PI Web API Endpoint (e.g. https://mypiwebapi.domain.com/piwebapi)
    • PI Archive Name (e.g. mypiarchive)
    • Export interval in milliseconds (e.g. 1000)
    • Username (e.g. piwebapiuser)
    • Password (e.g. piwebapipassword)
    • TopicDatapoint(s) that will be exported to corresponding PI tag(s) Name
  • After registering to export client, it would be appropriate to verify connectivity/authentication

• Step 2 - Initialization
  • The following steps need to be executed after the client registration through export client:
    • Verify if the tags are already existing in the PI Archive. 
      • For each configured tag, the following query must be executed.
      • https://mypiwebapi.domain.com/piwebapi/search/query?q=name:tagname&scope=pi:mypiarchive

      • If the tag already exists, the reply will look like:

        { "TotalHits": 1, "Links": { "Next": "https://mypiwebapi.domain.com/piwebapi/search/query?q=name%3Atagname&scope=pi%3Amypiarchive&count=10&start=10", "First": "https://mypiwebapi.domain.com/piwebapi/search/query?q=name%3Atagname&scope=pi%3Amypiarchive&count=10", "Last": "https://mypiwebapi.domain.com/piwebapi/search/query?q=name%3Atagname&scope=pi%3Amypiarchive&count=10&start=0" }, "Errors": [], "Items": [ { "Name": "tagname", "Description": "Some Description", "MatchedFields": [ { "Field": "name" } ], "ItemType": "pipoint", "AFCategories": [], "UniqueID": "\\\\{044de274-8d72-4cb6-839b-9e415e793dd8}\\?3", "WebId": "P0dOJNBHKNtkyDm55BXnk92AAwAAAAU1JWR0RZUExNT1NJRDAzXENEVDE1OA", "UoM": "deg. c", "DataType": "float32", "Links": { "Self": "https://mypiwebapi.domain.com:443/piwebapi/points/P0dOJNBHKNtkyDm55BXnk92AAwAAAAU1JWR0RZUExNT1NJRDAzXENEVDE1OA" }, "Score": 13.62607 } ] }

        
        In this case the WebId of the tag must be obtained in order to be used in further iterations. If the tag does not exist, the reply will look something like:

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• Step 3 - Data Export
  • TBD

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