Maximum retrieval - initial and final values

For analog tags, the maximum value of the tag in the cycle leading up to the query start time is returned with its timestamp changed to the query start time. If there is no point exactly at the phantom cycle start time, the point leading up to the phantom cycle is also considered for the maximum calculation. No adjustments are made to the quality of the initial point even though the timestamp may have been altered. Apart from the initial value, all points returned are delta points. (For more information on initial values, see Determining cycle boundaries.)

If a point occurs exactly on the query end time, that point is returned with the partial cycle bit, 4096, set in quality detail. If there is more than one such point, only the first point is returned.