BACnet MS/TP (Building Automation and Control Networks Master-Slave/Token Passing) is another fieldbus system based on the physical characteristics of RS 485, which is mainly used in the field of building automation. BACnet MS/TP defines a variety of services including data utilization, alarm processing, event handling, processing of value changes, device and network management, as well as various types of objects. Interoperability is ensured by means of a uniform approach to services and procedures, which is laid down in "application profiles". These profiles are available for a wide range of applications. The SINAMICS G120P inverters, especially developed for fluid flow machines (such as pumps, fans and compressor drives), use the application profile "BACnet application-specific controller" in building automation.