This command pertains to activating an ABB variable speed drive (VSD) or frequency converter, specifically instructing it to commence operation using its primary control input. This assumes the drive is ready to run and all safety interlocks are satisfied. This primary control source is typically configured during drive setup and could be digital inputs, fieldbus communication, or analog signals.
Starting a drive from its designated primary source ensures consistent and predictable operation based on the intended control scheme. This method avoids unintended starts from secondary sources or manual interventions, thereby enhancing safety and process stability. Standardized start procedures using the primary source are critical in industrial automation for repeatable and reliable process control. Historically, drive control has evolved from simple hardwired start/stop buttons to sophisticated network-based command structures, with an emphasis on safety and integrated automation.
