Configuring
4.11 Planning subnets
S7-300, CPU 31xC and CPU 31x: Installation
4-46 Operating Instructions, Edition 08/2004, A5E00105492-05
Comparison of the terminology in PROFIBUS DP and PROFINET IO
The following schematic shows you the general names of the most important devices in
PROFINET IO and PROFIBUS DP. The table below shows the designation of the various
components in the PROFINET IO and PROFIBUS DP context.
2
3
4
5
66
1
Figure 4-1 PROFINET and PROFIBUS nodes
Number PROFINET PROFIBUS Comment
1 IO system DP master
system
2 IO controller DP master Node used to address the connected IO
devices/DP slaves.
That is: the IO controller/DP master exchanges
input and output signals with field devices.
The IO controller/DP master is often the controller
on which the automation program runs.
3 IO supervisor PG/PC
Class 2 DP
master
PG/PC HMI device for commissioning and
diagnostics
4 Industrial Ethernet PROFIBUS Network infrastructure
5 HMI (Human
Machine Interface)
HMI Device for operating and monitoring functions.
6 IO device DP slave Distributed field device assigned to one of the IO
controllers/DP masters (for example, remote I/O,
valve terminal, frequency converter, switches)
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