Process Field Net, or PROFINET, is an industry technical standard in accordance with IEC 61784-2. It is used for data communication over Industrial Ethernet and designed for collecting data from, and controlling of, equipment in Industrial systems with delivery time approaching of 1 ms. The standard is maintained and supported by PROFIBUS & PROFINET International (PI), an umbrella organization headquartered in Karlsruhe, Germany.
PROFINET shouldn't be confused with PROFIBUS, which is a fieldbus communication standard for real-time automation purposes, first introduced in 1989 by the German department of education and research and later adopted by Siemens. The following diagram shows the specific place in the Industrial control system for each protocol:
 PROFINET supports Ethernet, HART, ISA100, and Wi-Fi, as well as legacy buses found on older...
