Product description
1.2 Fieldbus interfaces
M200D PROFIBUS/PROFINET
Manual, 08/2014, A5E01577426A/RS-AA/004
11
Fieldbus interfaces
1.2.1
PROFIBUS DP
What is PROFIBUS DP?
PROFIBUS DP is an open bus system in accordance with the standard
IEC 61784-1:2002 Ed1 CP 3/1 with the transmission protocol "DP" (DP is the abbreviation of
the German term "dezentrale Peripherie" (distributed I/O).
Physically, PROFIBUS DP is an electrical network based on a shielded twisted-pair cable.
The "DP" is a high-speed protocol for cyclic data exchange between the controller CPU and
the distributed I/O systems.
What is a DP master and what are DP slaves?
The DP master links the controller CPU with the distributed I/O systems. The DP master
exchanges data with the distributed I/O systems via PROFIBUS DP. It also monitors the
PROFIBUS DP.
The distributed I/O systems (= DP slaves) prepare the encoder and actuator data on site in
such a way that it can be transmitted via the PROFIBUS DP to the controller CPU.
Which devices can be connected to PROFIBUS DP?
PROFIBUS DP supports all DP masters or DP slaves which are compatible with IEC 61784-
1:2002 Ed1 CP 3/1 standard.
Operation on redundant systems
An M200D PROFIBUS DP communication module can also be operated on redundant
controllers and Y-link (H system).
The GSD file must be used for configuration, however.
DPV1 operation (reading/writing data records and alarms) is also possible behind a Y-link.
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