Ethernet
EK9300
52
Version: 3.2.6
6
Ethernet
6.1
PROFINET system presentation
PROFINET is the open Industrial Ethernet-standard of the PNO (PROFIBUS User Organization). PROFINET
IO describes the exchange of data between controllers and field devices in several real-time classes: RT
(software-based real-time) and IRT (hardware-supported isochronous real-time). In addition, further Ethernet
traffic can be transmitted in the NRT (non-real-time) time slot of the PROFINET cycle. RT can be networked
with commercially available switches; switches with corresponding hardware support are required for IRT.
Fig. 40: PROFINET system overview
