Graphs and Trends in IGSS

IGSS contains two types of graphs for viewing trends in the process:
  • The standard window-type graph and
  • the embedded graph

IGSS is able to combine real-time and historic data in the same graph. The operator can in this way quickly see the effects of a change in the monitored process.

Graph data can be presented in millisecond resolutions and with no time limitations. The display of process data in the form of graphs enables the operator to evaluate the response of the individual plant components with respect to time and provides operational information for quality assurance purposes.

Window-Type Graphs

Graphs presenting real-time data are normally displayed in separate windows.

The window-type graph can be created by the system designer and included in the Graph menu for easy operator access when running in the Supervise module.

the operator himself may create such a graph “on-the-fly” while monitoring. In both cases the graph created is dynamic, which means it presents real-time data as trends on the graph.

“On-the-fly” graphs can be saved by the operator as dynamic or as static graphs. If saved as dynamic, the operator can continually call them up to view real-time trends.

A graph that has been saved as a static graph will only display the process as it was rendered at the time the graph was saved.

Window-type graph
The window-type graph in the Supervise module

Embedded graphs

Embedded graphs are displayed as an integrated part of the process diagram they are embedded in. In addition to displaying real-time data as a function of time, embedded graphs can also display data as XY graphs.

Embedded type graph
The embedded type graph in the Supervise module