What Is Profibus Dp - Siemens ET 200pro Operating Instructions Manual

Description

1.2 What is PROFIBUS DP?

1.2 What is PROFIBUS DP?
What is PROFIBUS DP?
PROFIBUS DP is an open bus system according to the IEC 61784-1: 2010 Ed3 CP 3/1
standard and is based on the "DP" protocol (DP = Distributed Peripherals).
PROFIBUS DP is implemented either as an electrical network based on shielded twisted-pair
cable, or as an optical network based on fiber optic cable.
"DP" is a high-speed protocol for cyclic data exchange between a CPU and distributed I/O
systems.
What are DP masters and DP slaves?
A DP master represents the link between the CPU and distributed I/O systems. It exchanges
data with the distributed I/O systems via PROFIBUS DP, and monitors the PROFIBUS DP
bus.
Distributed I/O systems (=DP slaves) prepare the encoder and actuator data locally for
transfer to the CPU via PROFIBUS DP.
Which devices can be connected to PROFIBUS DP?
PROFIBUS DP supports all DP masters or DP slaves which are compatible with the
IEC 61784-1: 2010 Ed3 CP 3/1 standard.
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ET 200pro distributed I/O system
Operating Instructions, 03/2013, A5E00335544-08