Active Network Components - Siemens SIMATIC PROFINET Function Manual

Description
2.2 Setting up PROFINET
PROFINET devices and cabling technology in SIMATIC are suited for industrial use, as they
are based on Fast Ethernet and Industrial Ethernet.
● Fast Ethernet
You can use Fast Ethernet to transfer data at a speed of 100 Mbps. This transmission
technology uses the 100 Base-T standard for this.
● Industrial Ethernet
Structure of Ethernet in industrial environment.
The biggest difference from standard Ethernet is the mechanical current carrying capacity
and noise immunity of the individual components.
2.2.1

Active Network Components

Introduction
The following active network components are available for PROFINET:
● Switch
● Router
Switched Ethernet
PROFINET IO is based on switched Ethernet with full-duplex operation and a bandwidth of
100 Mbps. In this way, the network can be used much more efficiently through the
simultaneous data transfer of several devices. The PROFINET IO frames are processed with
high priority.
Switches
Switches are network components used to connect several terminal devices or network
segments in a local network (LAN).
For the communication of a device with several other devices on PROFINET, the device is
connected to the port of a switch. Other communication devices (including switches) can
then be connected to the other ports of the switch. The connection between a
communication device and the switch is a point-to-point connection.
A switch has the task of receiving and distributing frames. The switch "learns" the Ethernet
address(es) of a connected PROFINET device or additional switches and only forwards
those frames that are intended for the connected PROFINET device or the connected
switch.
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PROFINET with STEP 7 V14
Function Manual, 09/2016, A5E03444486-AG