Accessible through the navigation tree, Trend Studies display trend sample data from trends in Engine trend buffers and/or Metasys server repositories. A Metasys server on the site is not required to retrieve trend data from the Engine.
An Audit Trail message is created whenever you create, delete, or edit a Trend Study. Trend Studies, graphics, and folders are the only items you can create under a Metasys server on the navigation tree.
The main advantages to using Trend Studies are that you can:
view multiple trends at once (from both Engine and Metasys server )
view Metasys server historical trend data
configure the Study Range with flexible parameters