This user guide provides detailed instructions for setting up and using the Integrated Modbus communication features of the Altivar 71 drive. It covers bus connection methods, configuration of communication parameters, control-signal configuration, diagnostics, and protocol implementation. The guide includes information on physical connections, wiring recommendations, communication scanner setup, and fault management. It also details the Modbus functions supported by the drive and provides examples of communication frames for various operations. AI-assisted summary (Full document authored and validated by Schneider Electric experts).