6 Parameterization
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Three-state controller
This controller has two outputs, which can be configured as continuous (analog output) or switched (dig-
ital output). In both cases, the controller can be parameterized with P, PI, PD, or PID transmission be-
havior. The proportional bands Xp1 and Xp2 must be greater than 0 for the controller structure to take
effect.
If Xp1 = 0 and Xp2 = 0, the behavior corresponds to the function of limit value monitoring with switching
differential Xd1 and Xd2, and contact spacing Xsh (working point Y0 = 0 %):
Three-step controller
This controller has two switched outputs and can be parameterized with PI or PID transmission behavior.
The proportional band Xp must be greater than 0 for the controller structure to take effect.
The three-step controller is used for actuator drives with three switching statuses (actuator open, closed,
hold).
Continuous controller
This controller has a continuous output (analog output) and can be parameterized with P, PI, PD, or PID
transmission behavior. The proportional band Xp must be greater than 0 for the controller structure to
take effect (the setting Xp = 0 is not normally used in practice).
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