The IEC 60870-5 family defines based on the five basic standards IEC 60870-5-1 (frame formats), -2 (link transmission procedures) -3 (structure application data), -4 (information elements) and -5 (basic application functions)
the companion standards IEC 60870-5-101, -102, -103 and -104.
The IEC 60870-5 protocol family is used widely throughout Europe.
IEC 60870-5-101 is used as a general transmission protocol between a control system and substations (RTUs, Remote Terminal Units). It possesses general features in the context of SCADA applications.
The messages are usually transmitted through serial connections. The frame format is FT1.2.
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