Siemens SIMATIC ET 200M Manual page 17

Product Overview
What Is PROFIBUS-DP?
PROFIBUS-DP is an open bus system based on the
IEC 61784-1:2002 Ed1 CP 3/1 standard with the "DP" transmission protocol (DP
being the German abbreviation for distributed I/O).
Physically, PROFIBUS-DP is either an electrical network based on a shielded
two-wire line or an optical network based on a fiber-optic cable.
The "DP" transmission protocol allows a rapid, cyclic exchange of data between
the controller CPU and the distributed I/O devices.
What Are DP Masters and DP Slaves?
The DP master links the controller CPU with the distributed I/O devices. The DP
master exchanges data by means of PROFIBUS-DP with the distributed I/O
devices and monitors PROFIBUS-DP.
The distributed I/O devices (= DP slaves) prepare the data of the sensors and
actuators so that it can be transferred via PROFIBUS-DP to the controller CPU.
Which Devices Can be Connected to PROFIBUS-DP?
A wide range of devices can be connected to the PROFIBUS-DP bus system as
DP masters or DP slaves, provided their behavior conforms to
IEC 61784-1:2002 Ed1 CP 3/1. The devices that can be used include the following:
S SIMATIC S7/M7/C7
S SIMATIC S5
S SIMATIC PG/PC
S SIMATIC HMI (OP, OS and TD operator interfaces)
S Devices from other manufacturers
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Distributed I/O Device ET 200M
EWA-4NEB780600602-06