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8 Profinet IO RT interface
8.1 PROFINET IO function
PROFINET is the standard for industrial ethernet based on IEEE 802.xx. PROFINET is based on the 100
Mb/s-version of full-duplex and switched Ethernet. PROFINET IO is designed for the fast data exchange
between Ethernet-based controllers (master functionality) and field devices (slave functionality) with cycle
times up to 10 ms.
CAUTION!
The module internal gateway must not be overloaded. If the communication load becomes
too high, this gateway circuit might fail. The result is a temporary but complete failure of the
control functionality until the module is powered off. In order to avoid overcharge, do not
send new data faster than every 10 ms. This can be assured by calling the driver function in
an appropriate cycle of the PLC.
8.2 Profinet Installation guideline
The Profinet IO field devices are connected exclusively via switches as network components. A Profinet IO
network can be set up in star, tree, line or ring topology. Profinet IO is based on the Fast Ethernet standard
transmission with 100 Mbit / s. The transmission media are copper cables CAT5.
For the IP20 environment in the control cabinet, the RJ45 connector CAT5 according to EN 50173 or ISO /
IEC 11801 is used. The pin assignment is compatible with the Ethernet standard (ISO / IEC 8802-3).
The connection between Profinet participants is called Profinet channel. In most cases, Profinet channels are
built with copper cables to IEC 61784-5-3 and IEC 24702. The maximum length of a Profinet channel, which
is constructed with copper cables is 100 m.
8.3 PROFINET address assignment
All PROFINET IO slave devices need name and IP address to initiate communication.
Both are assigned to the device by the Profinet-IO-controller (PLC). The device name of the PROFINET IO
device is stored in persistent memory in the device. It can be modified by a Profinet IO supervisor, e.g. the
programming system of the belonging PLC.
Default address:
IP Address:
Subnet-Mask:
IP Address Gateway:
Address Example.:
IP Address:
Subnet-Mask:
IP Address Gateway:
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0.0.0.0
0.0.0.0
0.0.0.0
192.168.1.111
255.255.255.0
192.168.1.111
POS-124-U
24.01.2022
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