The ABB Advant OCS series is an open, modular, distributed control system launched by ABB in the 1990s. Its core innovation lies in its use of the open MasterBus 300 communication network and modular hardware, supporting integration with third-party devices. It was also the first to integrate process control and logic control functions, laying the foundation for the evolution of industrial automation systems from closed to open systems at that time. It was a key technological precursor to ABB's subsequent modern platforms such as System 800xA.

The core role of the ABB Advant OCS series is to provide an

The ABB Advant-800xA is not an independent product series, but rather a collective term or early transitional name for ABB's modern automation system architecture centered on System 800xA. Essentially, it is a comprehensive upgrade of the classic Advant OCS open architecture to the unified platform System 800xA, based on the concept of

The core function of ABB Advant-800xA is as a factory-level

Advant OCS is an open distributed control system launched by ABB in the 1990s, marking the transition from closed systems to open architectures. Advant-800xA is not a standalone product, but rather an early market name for ABB's System 800xA platform launched in the early 2000s, representing a comprehensive upgrade of Advant OCS.