Page History

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If you are using reference tags and have the Ignition Allow Back-fill Data enabled on the tag provider that will contain the reference tags, the Edge side client can publish historic in-order data either synchronously or asynchronously. Using each of these different flush methods has the following implications:

• In-order history from the Edge Node
  • Historical data will be stored for the Reference Tagreference tag
  • If history is enabled on MQTT Engine tags, historical data will be stored the MQTT Engine Tagtag
• Asynchronous history from the Edge Node
  • Historical data will be stored for the Reference Tagreference tag
  • Even if history is enabled on MQTT Engine tags, historical data will not be stored the MQTT Engine Tagtag. New values will only be stored in the historical database if it is a non-historical value.

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