Which option, when used in a query, will return the original value for a tag?

To understand why choosing 'Original' for the wwVersion in a query returns the original value for a tag, it's essential to recognize the different states that a tag value can occupy within the AVEVA Historian Server.

When querying data from the Historian, the wwVersion parameter can be used to specify different views or states of the data based on the context of the historical values stored. The term 'Original' specifically refers to the very first recorded value of a tag, which is crucial for situations where it is necessary to retrieve the initial state of the data, particularly in scenarios involving data corrections, audits, or historical analyses.

The option 'Current' typically pertains to the most recent value that has been recorded, while 'Latest' may return the most up-to-date entry in a transient manner. 'Previous' would usually refer to the value prior to the most recent entry. Thus, these options focus on different snapshots of the data over time, rather than the fundamental or initial value itself.

In summary, 'Original' is the correct choice because it precisely identifies the need to access the very first value logged for a tag, making it indispensable for specific analytical needs where understanding the data's initiation is essential.