Adp Level (Adaptation Of The Control Parameters) - Samson Trovis 6400 Mounting And Operating Instructions

AdP level (adaptation of the control parameters)

6.13. AdP level (adaptation of the control parameters)
The objective of this adaptation function is to calculate the optimum control parameters without
the need to make many adjustments on the process control station or without having much
previous knowledge of the process to be controlled.
The TROVIS 6412/42 Process Control Station supports the following adaptation procedures:
– Single adaptation (adaptation during the start-up phase) (see section 6.13.1.)
– Scheduling dependent on the actual value signal or output variable signal (see section
6.13.2.)
– Scheduling dependent on an external signal (see section 6.13.3.)
These adaptation procedures are suitable to be used for self-regulating processes, simple
integrating controlled systems, and systems with dead times, as well as for oscillating systems.
After having terminated the adaptation procedure, the process control station uses the calcula-
ted adaptation parameters as long as − AdP on − is set in the ADAPTATION level. Otherwise,
it operates with the control parameters set in the PARAMETER level. The calculated adaptation
parameters can be viewed in the ADAPTATION PARAMETER level −PA AdP− at any time and
can also be modified by the user, except for the parameters K
K characterizes the type of the controlled system. K
3
whereas K =2 stands for a system which is not self-regulating.
3
The adaptation parameters calculated by the adaptation algorithm ensure an optimum beha-
viour of the controlled system when disturbances occur in the process. The parameter K5 can
be used to activate an adjustable filter for the set point (reference variable) in order to obtain
satisfactory reference action of the process control station when there is a step change in the
set point (reference variable).
The current values of the controlled variable and the output variable are indicated on the display
during the entire adaptation run.
Note:
Configuration block C56-9 resets all parameters calculated in the adaptation procedure to their
default values (see also p. 45).
Requirements for adaptation
The following adjustments have to be made before conducting the adaptation:
1. Use configuration block C51 to configure the desired type of adaptation and, for cascade
control, additionally C52 (for cascade control, note section 6.13.4., p. 53; how to set a
configuration block is described in section 6.4., p. 36).
2. Regulate the controlled system, preferably in the MANUAL mode, and check whether the
system has assumed a calm state.
3. Access the ADAPTATION level and set the adaptation parameters required for the desired
adaptation procedure, see sections 6.13.1. to 6.13.3. (how to set a parameter is described
in the following sections).
46
, T , T and K
P N V
=1 characterizes a self-regulating system,
3
Operation
. The parameter
3