Page History

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When configured for In-Order History, MQTT Transmission will ensure that after the client reconnects, all historical data will be flushed before live data updates are resumed. Until the historical data is completely flushed, any new updates will continue to be written to the history store to ensure the in-order delivery of data.  When publishing in this mode, MQTT Engine should be configured to write historical tag changes to the tag. In other words, 'Store Historical Events' in the MQTT Engine General configuration should be unchecked.

Under the MQTT Transmission Settings for your transmitter, navigate to the History Settings to disable the In-Order History configuration parameter.

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If data is missing data at the Historian, then the next trouble-shooting troubleshooting steps are to adjust the MQTT Transmission Flush Quantity and Flush Period until you have a stable system when the messages published by MQTT Transmission are reliably consumed by your historian.

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