This reduces the inputs and outputs and the wiring work andmakes system startup easier. A shielded PROFIBUS cable is all you need forcabling the drives and programmable controller. At the same time, current status values aretransferred from the drive to the programmable controller. USS protocol, integrated as standardin the Micromasters, is used for communication with the drives. USS protocol library:The new, expanded USS protocol library for direct control of the Siemens Micromaster frequency converterMM3 and now also MM4 (via the CPU interface).The library makes it easier to control drives via the S7-200 due to special commands for activation andparameter modification (reading and writing parameters) for the drives. The new instruction library V1.1 creates two new standard libraries in STEP 7-Micro/WIN: Additional instruction libraries for STEP 7 Micro/WIN V3.2: USS protocol library Modbus protocol library
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