ProfibusProfinet

ProfibusProfinet is not a single protocol but a way to refer to the combined ecosystem of Profibus and Profinet technologies, both developed under the governance of Profibus & Profinet International (PI). Profibus covers serial fieldbus networks such as Profibus DP for discrete automation and Profibus PA for process automation, while Profinet is an Ethernet-based communication system designed for real-time control and IT integration. The term commonly appears in discussions of interoperability, migration, and gateways between the two families.

Technically, Profibus networks use a master/slave arrangement with cyclic data exchange, operating over different physical layers suitable for factory environments. Profinet, by contrast, uses Industrial Ethernet to provide real-time communication, device IO, and information exchange over standard Ethernet hardware. Profinet supports concepts such as IO devices, IO controllers, and real-time classes, enabling scalable architectures from simple machines to complex plants. The two families are designed to coexist in many facilities, with gateways or protocol converters bridging Profibus DP or PA networks to Profinet IO networks when required.

Interoperability is a key feature of the ProfibusProfinet ecosystem. Gateways and bridges enable communication between Profibus devices and Profinet systems, supporting gradual migration and integration of legacy equipment with modern automation. This approach allows manufacturers to preserve investments while increasing connectivity, data visibility, and IT compatibility across the factory floor.

Standards and governance are provided by Profibus & Profinet International (PI). The technologies are aligned with international standards within the IEC 61158 and IEC 61784 families, emphasizing conformance testing, device profiles, and interoperability. PI continues to promote development, certification, and best practices for both Profibus and Profinet.