Siemens SIMATIC ET 200AL System Manual page 1910

Devices with PROFIBUS DP
The figure below shows the most important components with PROFIBUS DP. The table
below lists the designations of the individual components.
Number PROFIBUS
①
②
③
④
⑤
⑥
⑦
Figure 2-2
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC
Note
DP master system
DP master Device used to address the connected DP slaves. The DP master
exchanges input and output signals with field devices.
The DP master is often the controller on which the automation
program runs.
PG/PC PG/PC/HMI device for commissioning and diagnostics
DP master of class 2
PROFIBUS Network infrastructure
HMI Device for operating and monitoring functions
DP slave Distributed field device assigned to the DP master, e.g., valve
terminals, frequency converters.
I-slave Intelligent DP slave
Devices with PROFIBUS
Description
2.1 Introduction to PROFIBUS
13