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5
CONTROLLER STRUCTURES
5.1
Overall Structure of the Digital Industrial Controller
Figure 4 shows the overall structure of the digital industrial controller in the form of a
signal flow chart. In addition to function blocks, it contains function selectors which
are used to set a concrete controller structure when configuring the controller.
The following concrete controller structures can be configured on the basis of the
overall structure:
•
Controller for single control loop
( Standard controller structure)
•
Controller with additional functions for feed forward control
( Feed forward controller structure)
•
Controller with additional functions for follow-up control
( External setpoint controller structure)
•
Controller with additional functions for ratio control
( Ratio controller structure)
•
Controller with additional functions for cascade control
( Cascade controller structure)
The function blocks contained in the overall structure are explained in Section 5.7.
DIGITAL INDUSTRIAL CONTROLLER
1110 - 13
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