What is significance of Max return Values in OPC HDA server?
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"Some OPC Servers could not manage a huge number of historian data values within a given time range. They have a significant server characteristic called "max returned value"; this parameter is useful in read calls in which the number of requested values to be read is specified " Check more on this @ link http://opcblogs.blogspot.sg/2007/01/opc-historical-data-access.html Q5.
So as per understanding this parameter is useful for data retrieval while reading history data, This parameter specifies limit(Max) of data to be read/retrieved within given time range. Get more info @ http://search.abb.com/library/Download.aspx?DocumentID=3BUF001094R5011&Lang