Industry Sector, IA&DT
In chapter
Chapter
–Plant diagram
–Area diagram
–Plant section/group diagram
–Detail diagram
The hierarchy of the flow diagram facilitates orientation and specific display selection. The uppermost levels Plant display and Area display provide an overview and are usually represented schematically. In small plants, the plant display corresponds to the area display (refer to Figure 1). In the plant display, it has to be possible to select each area directly. In the area display, the plant sections are displayed in a manner that their state can be recognized and the plant section can be selected and operated. The plant section and group display reflect functional relationships; typical units, final control units and control systems can be operated. Detail displays are of great importance to parameter assignment, commissioning and error search if there are plant faults. In detail displays, individual devices and units are represented and by means of effective lines, the functional relationships can be visualized. For example, the signal flow of a control loop can be tracked. [1].
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Figure 1: Hierarchy of mimics
display
Plant section
display
Detail display
Curves are used for process control during intended operation, or for diagnosing faults [2]. They supplement the display with flow diagrams, particularly because they indicate the dependence of process values on time.
Related displays are: the display of a process value depending on the path, on other process variables, and even of several reference variables that are not described here, however.
SCE Training Curriculum | Page 4 of 42 | To be used only at Educational and R&D Facilities |
PA Module |
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