West-control-solutions KS 92-1 Programmer manual Manual de usuario descargar pdf (Pagina 15)

Self-tuning heating ( ADA.H) and cooling ( ADA.C) error status:

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,

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]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 )

Operation

KS 90-1p / KS 92-1p 15 Self-tuning

Error

status

Description Behaviour

0 No error

3 Faulty control ac

tion

Re-configure controller (inverse i direct)

4 No response of

process variable

The control loop is perhaps not closed: check sensor, connections

and process

5 Low reversal point Increase ( ADA.H) max. output limiting Y.Hi or decrease (

ADA.C) min. output limiting Y.Lo

6 Danger of excee

ded set-point (pa

rameter

determined)

If necessary, increase (inverse) or reduce (direct) set-point

7 Output step chan

ge too small (dy >

5%)

Increase ( ADA.H) max. output limiting Y.Hi or reduce ( ADA.C)

min. output limiting Y.Lo

8 Set-point reserve

too small

Acknowledgment of this error message leads to switch-over to auto

matic mode.If self-tuning shall be continued,

increase set-point (invers), reduce set-point (direct)

or decrease set-point range

(r PArA / SEtp / SP.LO and SP.Hi )

9 Impulse tuning fai-

led

The control loop is perhaps not closed: check sensor, connections

and process

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West-control-solutions KS 92-1 Programmer manual Manual de usuario Pagina 15

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