IEC 60870-5-1 Ed. 1.0 b:1990
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Telecontrol equipment and systems. Part 5: Transmission protocols – Section One: Transmission frame formats
Covers asynchronous data transmission with half duplex and duplex link protocols operating with window size one for message transfers. Specifies the basic requirements for services to be provided by the link plus physical layers, for telecontrol applications. In particular it specifies standards on coding, formatting and synchronizing data frames of variable and filed lengths which meet specified data integrity requirements.
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