Burkert Type 1110 - Handbuch (Seite 26)

24 - 1110
DIGITAL INDUSTRIAL CONTROLLER
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The cascade controller structure highlighted in Figure 14 is obtained by
appropriately configuring the overall structure.
PID controller 1 is used as the main controller and PID controller 2 as the auxiliary
controller. Input 1 is used for the controlled variable PV1 of the main control loop and
input 2 is used for the auxiliary controlled variable PV2.
SP1 is the setpoint for the main control loop. When the main controller is in AUTO
mode, it specifies the setpoint for the auxiliary control loop. When the main controller
is in MANUAL mode, a setpoint SP2 for the auxiliary control loop can be set on the
keyboard.
5.6.2 Cascade controller structure