What method does Delta recording use in data acquisition?

Delta recording is an efficient method of data acquisition that optimizes the process of storing and retrieving data in a historian environment. The method captures data based on a defined interval but only when there are changes to the value or its associated quality. This reduces the amount of data stored and maximizes the relevancy of the information collected, ensuring that the database contains only significant changes over time rather than redundant information that does not contribute to the overall analysis.

Choosing to record at specified intervals enhances the ability to analyze historical data while also ensuring that only meaningful updates are made to the dataset. This balance allows for efficient storage while maintaining a high fidelity of data quality, which is crucial for monitoring operational performance and making informed decisions based on historical trends.