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