Burkert Type 1110 - Handbuch (Seite 81)

1110 - 79
DIGITAL INDUSTRIAL CONTROLLER
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Step 1: Either use the tune function to determine starting parameters or select
the starting parameters in the parameter definition level,
Controller
option:
• Set the
proportional action coefficient / Gain Kp to a value that will
produce a lasting system deviation of < 80% of the given setpoint
change in the stationary process state.
• Set the reset time Tr to a very high value (e.g. 9999 s).
• Leave the derivative action time Td at 0 (works setting) if you are
trying to optimise a PI structure or set the derivative action time Td
to 0.1 if you wish to optimise a PI structure.
Step 2: Select options in the parameter definition level, Adaption option:
• Activate adaption
• Select Setpoint in several stages
Step 3: Enter the required process setpoint in the process control level.
Under these conditions, the process setpoint is set in up to 5 stages
and, in doing so, the controller parameters are optimised in each
stage.
Configuration and parameter definition levels
Both in the configuration and also in the parameterisation levels, first the Tune
module and then the Adaption module can be used for adaption in the sub-menus.
However, Tune and Adaption cannot be run simultaneously (cf. Par. 7.4).
When the
Tune: on option is selected, the controller parameters are optimised the
first Time the setpoint changes. When using a corresponding output as detailed in
the table at paragraph 7.5, the
Adapt: on option produces an evaluation of the
controlled variable’s transient response with each change in the setpoint and, if
applicable, optimisation of the controller parameters.
The
SP
↑↑: yes option activates a new setpoint is set in several stages within the
adaption function, each of these stages being used for one optimisation cycle.
If
SP ↑↑:no is selected, optimisation takes place in one stage.
When the PV
↑: yes or PV↑: no option is selected, the adaption function performs
optimisation on the basis of the shortest control stabilisation time with 5 %
overshoot or an aperiodic transition response.
Process operating level
The adaption process cannot be influenced directly in the process operation level. A
running adaption cycle can, however, be aborted by pressing the MANUAL/
AUTOMATIC key twice.
If the setpoint is changed while an adaption cycle is running, adaption is aborted
and a new adaption cycle is initialised on the basis of the new setpoint according to
the options selected during configuration or parameter definition.
7.6 Operating the tuning and adaption functions