For the use of real time, communication standard Ethernet
components can be used. The RT service switches to Layer 2 of the
This solution minimizes the cycle times in the communication
stack substantially. Besides, the minimized communication stack in
the programmable controller, the transmission of data will also be
optimized in the network with PROFINET.
In order to achieve an optimal result, the packages are
prioritized according to IEEE 802.1Q . The standard Ethernet
components (e.g. switches) have to support this prioritizing for
the RT services according to the IEEE standard.