PROFIBUS and PROFINET International (PI) has specified over a dozen PROFINET Application Profiles. Application Profiles are an additional layer above the PROFINET protocol. A PROFINET product that supports one or multiple Application Profiles offers further functionality besides the standard PROFINET capabilities. The most commonly implemented Application Profiles are PROFIsafe for functional safety, PROFIenergy for energy management, and PROFIdrive for interoperable drive devices.