The Lenze 9300 vector range of vector-controlled frequency inverters is also ideal for complex applications such as those found in closing, filling and feeder systems as well as on winding drives. Function blocks that can be connected in accordance with user requirements enable the inverter to behave like a PLC and take over open-loop and closed-loop control functions, in addition to managing the actual drive task. This relieves the burden on and, in some cases even the need for, higher-level controllers.