PROFINET Forum

Can PROFINET used instead of TCP/IP?

Webinar_Question wrote: ↑22 Mar 2024, 12:44 Can PROFINET used instead of TCP/IP?

PROFINET is a protocol suite based on standard Ethernet. Frames have been defined that look different depending on the service. Ultimately, all of this is already included in the devkit.

• 1. the naming of the devices (initial assignment of addresses) and the discovery of the devices by the controller during start-up is DCP (Discovery and Configuration Protocol). This is based on layer 2

• 2. the neighbourhood service is defined in IEEE 802.1AB, called LLDP and is also a layer 2 frame.

• 3. acyclic services: IP+UDP

• 4. cyclic frames: Layer 2

Since PROFINET does not exclude other frames, but is really based on standard Ethernet, TCP/IP can also be spoken in parallel on the same line. PROFINET ensures the QoS by tagging the frames using the VLAN tag (VLAN Prio PCP 6).