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ABB Advant Controller 450 - Feedback Control

ABB Advant Controller 450
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Powerful functions for feedback control are provided with a great number of PC elements and
functional units. Examples of applications are:
Basic PID control
Cascade-coupled controllers
Ratio control
Manual control from central/local operator’s workplace
Controlling final elements with two- or three-position action
Override control
Batch control
Split range
Gain scheduling or other adaptation strategies
User-defined control strategies combining the range of available algorithms P, PI, PDP,
PIP, DER, INT, FILT-1P/2P, P-DEADB and RAMP.
The built-in features in one of the complex loop controllers, the functional unit PIDCONA, are:
Several control modes with built-in priority scheduling
Automatic tracking for bumpless control mode changeover
Cascade inputs
Differentiation, either of the measured value or the control deviation
Parameter scheduling
Forcing control of the output signal
Limitation of set-point and output with respect to amplitude and rate of change
Limit supervision with event and alarm handling
Powerful operator interface.
Self-tuning and adaptive PID algorithm.
It is easy to combine such a loop controller with supplementary functions, for example
interlocking, start-up and shut-down sequences, calculations, process optimization and so on.
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The function FUZZYCON allows the user to specify the control algorithm using fuzzy control,
which is an applied science of fuzzy theory. Moreover, the function supports multi variable
input and multi variable output, that is several controlled variables and manipulated variables
can be handled simultaneously. To the operators, FUZZYCON exposes the same “look and feel”
as other functions, that is PIDCON, with respect to object displays and dialogs. This is also true
for other run time features and most of the engineering tasks.

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