What communication standard is Profinet?

profinet is a new generation of automation bus standard based on industrial Ethernet technology; profinet is a new Ethernet communication system, developed by Siemens and the PROFIBUS User Association, with communication between products of multiple manufacturers capabilities, automation and engineering models.

The operating environment of this tutorial: Windows 10 system, DELL G3 computer.

What communication standard is profinet?

PROFINET is an open industrial Ethernet standard launched by PI. It is mainly used in the fields of industrial automation and process control. It complies with the content under the IEEE 802.3 specification and has automatic negotiation and automatic crossover functions.

PROFINET is a new Ethernet communication system, developed by Siemens and the PROFIBUS Users Association. PROFINET has communication capabilities between multi-manufacturer products, automation and engineering modes, and is optimized for distributed intelligent automation systems. The result of its application can significantly save configuration and debugging costs. PROFINET systems integrate PROFIBUS-based systems, providing protection for existing system investments. It can also be integrated with other fieldbus systems.

PROFINET technology defines three types: PROFINET1.0 component-based system is mainly used for communication between controllers; PROFINET-SRT soft real-time system is used for communication between controllers and I/O devices; PROFINET- IRT hard real-time systems are used for motion control.

PROFInet organically integrates factory automation and enterprise information management IT technology while fully retaining the existing openness of PROFIBUS.

The PROFInet fieldbus architecture is shown in the figure. It can be seen from the figure that the solution supports open, object-oriented communication. This communication is based on the commonly used Ethernet TCP/IP and is optimized. The communication mechanism can also meet the requirements of real-time communication. The DCOM communication protocol based on object applications is established through this protocol standard. PROFInet components represented in the form of objects exchange their automation data according to the object protocol. Automation objects, that is, COM objects, appear on the communication bus as PDUs in the form of DCOM protocol definitions. Activity Control of Connection Objects (ACCO) ensures the establishment of communication relationships and the exchange of data between configured interconnected devices. The transmission itself is event controlled, and ACCO is also responsible for recovery after failures, including transmission of quality codes and time stamps, monitoring of connections, re-establishment after connection loss, and testing and diagnosis of interconnectivity.

PROFINET was launched by PROFIBUS International (PI) and is a new generation of automation bus standard based on industrial Ethernet technology.

PROFINET provides a complete network solution for the field of automation communication, covering current hot topics in the field of automation such as real-time Ethernet, motion control, distributed automation, fail-safety and network security. Moreover, as a cross-vendor technology, it is fully compatible with industrial Ethernet and existing fieldbus (such as PROFIBUS) technologies to protect existing investments.

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