Instruction Manual

Operation
9499-040-93811 / 59537-1 Page 15 of 88 Pro-16
3.7 Self-tuning
(automatic adaption of control parameters)
For determination of optimum process parameters, self-tuning is possible.
After starting by the operator, the controller makes an adaptation attempt, whereby
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]. This parameter is optimized only, unless
parameter Cntr/Adt0 was configured for “no self-tuning” using 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]. This parameter is optimized only, unless
parameter Cntr/Adt0 was configured for “no self-tuning”using BlueControl
®
 Parameterset 2: according to Parameterset 1 (see page 23)
3.7.1 Preparation before self-tuning
o The limits of the control range must be adjusted for the controller operating range, i.e.
rnG.L and rnG.H must be adjusted to the limits within which control must take
place ConfigurationrControllerrspan start and end of control range)
ConFrCntrrrnG.L and rnG.H
o Determine which parameter set must be optimized.
- The currently effective parameter set is optimized.
r activate the corresponding parameter set (1 or 2).
o Determine which parameter must be optimized (see the list given above)
o Select the method for self-tuning (See Chapter 3.7.616)
- Step attempt after start-up
- Pulse attempt after start-up
- Optimization at the set-point