User Tools

Site Tools


kb:production:s7-communication:protocol

01 Protocol Overview

The S7 Communication builds on the following protocols:

About the ISO protocol family: https://gitlab.com/wireshark/wireshark/-/wikis/IsoProtocolFamily

Packet Structure

The S7 Communication packets are wrapped in ISO TP packets, which are wrapped in ISO on TCP packets, which are wrapped in TCP/IP packets.

S7 Comm S7 Head S7 Params S7 Data
ISO TP COTP Hdr S7PDU
ISO on TCP TPKT Hdr TPDU
TCP TCP Hdr TCP data
kb/production/s7-communication/protocol.txt · Last modified: 2021/05/04 15:01 by manuel.sebald