Two examples are PROFIsafe and PROFIdrive. Some application profiles are widespread, though.

Each application profile is tailored to a specific use, and new profiles appear regularly. There are many profiles that combine standards for transmission media, communication protocol (FMS, DP-V0, etc…), and unique protocols. PROFIBUS can be tailored to specific needs using application profiles. Buses using MBP can reach 1900 meters and can support branches. A smaller power reduces, or nearly eliminates, the possibility of explosion. The technology steps the power down, though. It permits transmission of both data and power. The MBP media was designed specifically to be used in PROFIBUS PA. A safety-enhanced system called Manchester Bus Power, or MBP, is also available in situations where the chemical environment is prone to explosion. PROFIBUS systems can now operate using fiber-optic transmission in cases where that is more appropriate. Two more advanced systems are also available. The first is a standard twisted-pair wiring system, in this case RS485. PROFIBUS systems can have three types of media. The token passing concept is like the speaking conch only the person with the conch is allowed to talk.įinally, PROFIBUS defines a physical layer, though it leaves room for flexibility. Only the node with the token can communicate. PROFIBUS also includes token passing, a system in which a “token” signal is passed between nodes. In a master-slave network, masters, usually controllers, send requests to slaves, sensors and actuators. The FDL system combines two common schemes, master-slave methodology and token passing. The data link layer is completed through a Field bus Data Link, or FDL.

It does, however, define the data link and physical layers, layers one and two. PROFIBUS does not define layers three through six. Some of the types of messaging PROFIBUS supports include cyclic and acyclic data exchange, diagnosis, alarm-handling, and isochronous messaging. There are multiple versions of PROFIBUS that handle different types of messaging at the application layer. First, PROFIBUS describes the application layer. PROFIBUS networks make use of three separate layers of the OSI Network model.

Profibus dp specification