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PD-01 PROFIBUS-DP Module
DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
5
Chapter 2 Introduction
PROFIBUS
PROFIBUS is an international, vendor- independent, opening filed bus standard for a wide
range of applications in the fields of manufacturing, production, process and building
automation, and other automation control field.
The PROFIBUS family comprises three types of protocol, PROFIBUS-DP, PROFIBUS-PA and
PROFIBUS-FMS, each of them is used for different tasks:
PROFIBUS-DP (Decentralized Periphery): PROFIBUS-DP is a rapid and low cost
communication connection designed for high-speed data transmission at field level.
PROFIBUS-DP has widespread usage for such items as remote I/O systems, motor
control centers, and variable speed drives. It is designed and optimized especially for
communication between automation systems and decentralized peripheral devices.
PROFIBUS-PA (Process Automation): PROFIBUS-PA is the PROFIBUS solution for
process automation, typically with MBP-IS transmission technology. Based upon
PROFIBUS-DP, PROFIBUS-PA is an extension of the PROFIBUS-DP protocol for data
transmission. It is designed to support intrinsically safe applications and can be used
within hazardous areas, with high explosion risk using intrinsic safe MBP-IS interface.
PROFIBUS-PA is used to connect sensor and controller to the bus.
PROFIBUS-FMS (Fieldbus Message Specification): PROFIBUS-FMS is multiple
master communications designed for communication at the cell level. It is designed for
acyclic or cyclic data transfers at medium speed between control equipment and
cell-level controllers. FMS services open up a wide range of applications and offer a
wide range of functionality and flexibility.
The Maximum cable length in a segment depends on the transmission speed. PROFIBUS-DP
communicates at speeds from 9.6 Kbps to 12 Mbps over distances from 100 to 1,200 meters.
Baud Rate
(bps)
9.6K 19.2K 93.75K
187.5K 500K 1.5M 12M
Length (m) 1200 1200 1200 1000 400 200 100