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The following four main stages can be identified in the control system design procedure:
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Based on process control application analyses, a definition of the equipment must be
made.
The system definition phase is supported by this manual, especially Chapter 1, which gives
an overall introduction from the functional and available resources viewpoints and, of
course, Section 3.1, Design Considerations. In addition, Section 3.2, Technical Data
Including Capacity & Performance gives some important information.
The $GYDQW2&63URGXFW*XLGH gives you an overview of the available product
alternatives and possible options. Not “every combination” is either practical or offered.
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The controller system configuration is the practical work required to create the
infrastructure of the controller, that is the computer resources to maintain the application
functions.
You can regard this phase, more or less, as an installation activity.See Section 2.4.2.4,
Controller System Configuration.
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This phase is, to a certain extent, supported by the same chapters as the system definition
phase. However, most information is available in separate reference documents as follows.
– Configuration and Programming
– PC Programming
– PC Elements
– DB Elements
– Functional Unit descriptions (adequate parts)
– Application Examples: Measuring, Feedback Control.
Please refer to Section 1.5 for further document information.
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This is not really a design procedure. However, during the design there are certain
installation considerations to take care of, for example the connection to the process. It is
mentioned here as a reminder.
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System definition in the actual context is a definition of the equipment required.
As a basis of the system definition, it is assumed that superior design stages have resulted in an
overall rough application-functional identification. It is further assumed that a scheme of the
functional distribution is available. Thus, a rough allocation of functions to different controllers
is available.