West Control Solutions KS 92-1 - Manual (Page 16)

3.5 Self-tuning
For determination of optimum process parameters, self-tuning is possible.
After starting by the operator, the controller makes an adaptation attempt, where-
by the process characteristics are used to calculate the parameters for fast line-out
to the set-point without overshoot.
The following parameters are optimized when self-tuning:
Parameter set 1:
Pb1 - Proportional band 1 (heating) in engineering units [e.g. °C]
ti1 - Integral time 1 (heating) in [s]r only, unless set to OFF
td1 - Derivative time 1 (heating) in [s]r only, unless set to OFF
t1 - Minimum cycle time 1 (heating) in [s]r only, unless Adt0 was
set to “no self-tuning” during configuration by means of
BlueControl
®
.
Pb2 - Proportional band 2 (cooling) in engineering units [e.g. °C]
ti2 - Integral time 2 (cooling) in [s]r only, unless set to OFF
td2 - Derivative time 2 (cooling) in [s]r only, unless set to OFF
t2 - Minimum cycle time 2 (cooling) in [s] r only, unless Adt0
was set to “no self-tuning” during configuration by means of
BlueControl
®
.
Parameter set 2: analogous to parameter set 1 (see page 25)
3.5.1 Preparation for self-tuning
w Adjust the controller measuring range as control range limits. Set values
rnG.L and rnG.H to the limits of subsequent control.
(ConfigurationrControllerrlower and upper control range limits)
ConFrCntrr rnG.L and rnG.H
w Determine which parameter set shall be optimized.
-The instantaneously effective parameter set is optimized.
r Activate the relevant parameter set (1 or 2).
w Determine which parameter set shall be optimized (see tables above).
w Select the self-tuning method
see chapter 3.5.3
-Step attempt after start-up
-Pulse attempt after start-up
-Optimization at the set-point
Operation
Self-tuning 16 KS 90-1 / KS 92-1