Siemens SINAMICS G120 - Cascade Control

6.21 Cascade control
Overview
The cascade control is ideal for applications in which, for example, significantly fluctuating
pressures or flow rates are equalized.
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DM Speed-controlled motor
M1 … M3 Uncontrolled motors
P Pressure sensor. Interconnect the signal of the pressure sensor with the actual-value input
of the technology controller.
Figure 6-35 Example: Cascade control for the pressure in a liquid pipe
To deploy the cascade control, you must activate the technology controller.
Depending on the set-actual variance of the technology controller, the cascade control of the
inverter switches a maximum of three additional motors directly to the line supply via contactors.
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Advanced commissioning
6.21 Cascade control
Converter with the CU230P-2 Control Units
288 Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257946B AE