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Application: S7comm

S7 Communication (S7comm)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. The S7comm data comes as payload of COTP data packets. The first byte is always 0x32 as protocol identifier. Special communication processors for the S7-400 series (CP 443) may use this protocol without the TCP/IP layers. It can be used as part of Industrial Control System (ICS) or Supervisory Control And Data Acquisition (SCADA) protocol.

  S7comm -- SPARC S7 ROSCTR Job Setup Communication To Client
  S7comm -- SPARC S7 ROSCTR Job Setup Communication To Server
  S7comm -- SPARC S7 Request CPU Function Read
  S7comm -- TCP Activity (Setup)
  S7comm -- TCP Activity (Data)


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