1110 - 77
DIGITAL INDUSTRIAL CONTROLLER
english
Adapting a cascade controller
In a cascade controller, the main controller (Controller 1) and the auxiliary controller
(Controller 2) are adapted separately.
• Adapting the auxiliary controller:
The auxiliary controller can only be adapted if it is in AUTOMATIC mode and the
main controller is in MANUAL mode. This is why the main controller must be
switched to MANUAL mode at the start of an adaption. A setpoint change SP2 must
then be implemented for the auxiliary controller. The main controller must be
returned to AUTOMATIC mode once adaption of the auxiliary controller has been
completed.
• Adapting the main controller
The main controller can only be adapted if both controllers are in AUTOMATIC mode
and adaption of the auxiliary controller has been completed. This is why the main
controller must not be returned to AUTOMATIC mode until the auxiliary controller
has been adapted. A setpoint change SP1 must then be implemented for the main
controller. Adaption of the main controller is cancelled if the auxiliary controller is
switched to MANUAL mode during adaption.
Starting up to the setpoint in stages
If it can be expected that the set starting parameters are at a distance from the
optimum controller parameters, a new setpoint can be set in stages (Figure 43).
Figure 43: Example of starting up to a setpoint in 3 stages with one adaption
cycle each
PV
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