Communication
8.5 PROFIBUS
S7-200 SMART
System Manual, 09/2015, A5E03822230-AC
373
In the figure below, the S7-200 SMART CPU is a DP device for an S7-1200 controller:
You can configure two PROFIBUS EMs per S7-200 SMART CPU (ST and SR models only).
The local CPU stores the PROFIBUS EM configuration data, and you set the PROFIBUS
addresses with switches on each module. This allows simple replacement of these
communications modules when necessary.
EM DP01 PROFIBUS DP module
8.5.1.1
Distributed Peripheral (DP) standard communications
PROFIBUS DP (or DP Standard) is a remote I/O communications protocol defined by the
European Standard EN 50170. Devices that adhere to this standard are compatible even
though they are manufactured by different companies. DP stands for distributed peripherals,
that is, remote I/O. PROFIBUS stands for Process Field Bus.
The EM DP01 PROFIBUS DP module has implemented the DP Standard protocol as
defined for DP devices in the following communications protocol standards:
● EN 50 170 (PROFIBUS) describes the bus access and transfer protocol and specifies the
properties of the data transfer medium.
● EN 50 170 (DP Standard) describes the high-speed cyclic exchange of data between
DP masters and DP devices. This standard defines the procedures for configuration and
parameter assignment, explains how cyclic data exchange with distributed I/O functions,
and lists the diagnostic options which are supported.
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