S7comm (S7)
Formal
The S7 protocol is designed for transfering the data into the SCADA systems via the Ethernet.
Practical
S7comm (S7 Communication) is a Siemens proprietary protocol that runs between programmable logic controllers (PLCs) of the Siemens S7-300/400 family. It is used for PLC programming, exchanging data between PLCs, accessing PLC data from SCADA (supervisory control and data acquisition) systems and diagnostic purposes.
