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9
PROFINET communication
9.1
About PROFINET
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Lenze · I/O system 1000 · Reference Manual · DMS 5.0 EN · 09/2016 · TD17
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PROFINET performance features
PROFINET according to IEC 61158 has the following performance features:
• Full duplex transmission with 100 Mbit/s via copper cables or optical fibre
• Switched Ethernet
• Auto negotiation (negotiating the transmission parameters)
• Auto crossover (transmit and receive path are automatically crossed if required)
• Wireless communication via Bluetooth or WLAN
• UDP/IP is used as higher-level protocol. UDP stands for User Datagram Protocol and comprises
the unsecured connectionless broadcast communication in combination with IP.
PROFINET devices
As with PROFIBUS-DP, the following devices are classified according to their tasks with PROFINET IO
as well:
• IO-Controller
• IO-Device
• IO-Supervisor
The IO-Controller is equivalent to the master under PROFIBUS. Here, it is the PLC with PROFINET
connection in which the automation program is executed.
An IO-Device is a decentralised I/O field device which is connected via PROFINET. The IO-Device is
equivalent to the slave under PROFIBUS.
An IO-Supervisor is an engineering station as for example a programming device, a PC or a control
panel for commissioning and diagnostics.
Industrial Ethernet
Due to the openness of PROFINET standard, you can use standard Ethernet components. For
industrial environments and due to the high baud rate of 100 Mbps, the PROFINET system should
consist of industrial Ethernet components. All devices connected via switches are located in one
network and can communicate directly with each other. A network is physically limited by a router.
For communication via network limits, you must program your routers in such a way that they
permit this communication.