Glossary term
PROFIBUS
protocoleBasics
Also known as
PROFIBUS DPPROFIBUS PAPROFIBUS FMS
Definition
Serial fieldbus standardised as IEC 61158/IEC 61784, maintained by PI (PROFIBUS & PROFINET International). Available as DP (decentralised periphery, up to 12 Mbit/s) and PA (process automation, bus-powered). Massive installed base in industry.
Questions using this term
- A typical chemical plant uses PROFIBUS DP as backbone (DCS level 2) plus PROFIBUS PA segments for the transmitters located in Ex ia / ib zones (lower process layers), an architecture which will remain dominant against PROFINET-APL for another 5-10 years in process industry.21. Use cases · Anwendungsfall Chemieanlage
- A compact PROFIBUS DP slave has an I/O configuration that is frozen at manufacturing time (e.g. a 32-bit encoder, a 4-module pressure transmitter), which simplifies configuration but limits flexibility.4. GSD files · Kompaktslave
- PROFIBUS DP slave addresses range from 0 to 125 (usable); address 126 is reserved as the factory commissioning address and 127 is the broadcast address (no data exchange).5. Addressing · Adressbereich
- PROFIBUS PA transmitters typically implement a standardised "PA Profile Device": Differential Pressure (DP transmitter), Pressure (P), Temperature (T), Level (L) and Analytical (pH, conductivity), with harmonised function blocks and parameters.9. Profiles · PA-Profile-Devices
- PROFIBUS profiles (PROFIsafe, PROFIdrive, PA Profile) are identical between PROFIBUS and PROFINET, which lets you migrate the network infrastructure without having to re-certify the safety, drive or process application functions.10. Migration to PROFINET · Wiederverwendung der Profile
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