Profinet Interface - Siemens SIMATIC PROFINET Function Manual

2.1.3

PROFINET interface

Overview
PROFINET devices of the SIMATIC product family have one or more PROFINET interfaces
(Ethernet controller/interface). The PROFINET interfaces have one or more ports (physical
connection options).
In the case of PROFINET interfaces with multiple ports, the devices have an integrated
switch.
PROFINET devices with two ports on one interface allow you to configure the system in a
line or ring topology. PROFINET devices with three or more ports on one interface are also
ideal for setting up tree topologies.
Properties and rules for naming the PROFINET interface and its representation in STEP 7
are explained in the following.
Properties
Every PROFINET device on the network is uniquely identified via its PROFINET interface.
For this purpose, each PROFINET interface has:
● A MAC address (factory default)
● An IP address
● A PROFINET device name
Identification and numbering of the interfaces and ports
Interfaces and ports for all modules and devices in the PROFINET system are identified with
the following characters:
Table 2- 3
Element
Interface
Port
Ring port
Examples of identification
Three examples illustrate the rules for identifying PROFINET interfaces:
Table 2- 4
Sample labeling
X2 P1
X1 P2
X1 P1 R
PROFINET with STEP 7 V14
Function Manual, 09/2016, A5E03444486-AG
Identification for interfaces and ports of PROFINET devices
Symbol
X
P
R
Examples for identifying PROFINET interfaces
Interface number
2
1
1
Interface number
In ascending order starting from number 1
In ascending order starting from number 1
(for each interface)
Port number
1
2
1 (ring port)
Description
2.1 Introduction to PROFINET
23