PROFINET Real-Time Protocol (PN-RT)

Profinet RT is one of the protocols of the Profinet family. It used for real time cyclic data transfer with Industrial Programable Logic Controllers. Communications using PN-RT bypass the standard TCP/IP interface provided by Profinet to provide high speed communications of up to 12MBd. Specifically it was designed for time critical discrete input/output and message transfer.

History

The PN-RT protocol was released with Profinet specification v2.2 in June 2007.

Protocol dependencies

• EthernetHardware: PN-IO is directly on top of Ethernet and uses Ethernet type 0x8892

Example traffic

XXX - Add example traffic here (as plain text or Wireshark screenshot).

Wireshark

The PN-RT dissector is fully functional.

Preference Settings

(XXX add links to preference settings affecting how PN-RT is dissected).

Example capture file

XXX - Add a simple example capture file to the SampleCaptures page and link from here. Keep it short, it's also a good idea to gzip it to make it even smaller, as Wireshark can open gzipped files automatically.

Display Filter

A complete list of PN-RT display filter fields can be found in the display filter reference

Show only the PN-RT based traffic:

 pn_rt

Capture Filter

Capture only the PN-RT based traffic:

 ether proto 0x8892

Capture everything except the PN-RT based traffic:

 not ether proto 0x8892

External links

• add link to PN-RT specification

• PROFINET Unplugged - An introduction to PROFINET IO

Discussion

Imported from https://wiki.wireshark.org/PROFINET/RT on 2020-08-11 23:18:26 UTC