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5.6
Self-optimization
Self-optimization determines the optimum controller parameters for PID or PI controllers.
The following controller parameters are defined:
The controller selects procedure a or b, depending on the size of the control deviation:
a) Self-
optimization
in the
approach
phase
x = process value
w = setpoint
Starting self-optimization
H
Starting self-optimization is not possible with active
level inhibit and ramp function.
Self-optimization is automatically terminated, or can be can-
celled.
Start
rt
,
dt
,
Pb:1
,
Pb:2
b) Self-
optimi-
zation
Switching
at set-
level
point
i + d
,
Cy 1
,
Cy 2
,
dF
Start
>2s
260
tunE
i+ d
23
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