There are two purposes for the Symphony Profile Curves / Ideal Curves facility. The first is to define and display an “ideal” curve that a signal value should follow, this curve being displayed on a trend graph alongside the actual trace of the signal for comparison purposes. The second use is to prepare control profiles that can be subsequently downloaded into PLC's or standalone three term controllers.

Profile Curves are in the form of CSV (comma separated variable) files and Symphony provides two convenient ways of generating them. One is through the facility in Trends to save a graph as a profile curve. The other is by using the Profile Editor.