Specifies the basic requirements for services to be provided by the link and physical layers for telecontrol purposes. Establishes standards for coding, formatting and synchronizing data frames. Covers asynchronous data transmission with half duplex and
IEC 60870-5-1:1990 history
1990IEC 60870-5-1:1990 Telecontrol equipment and systems; part 5: transmission protocols; section one: transmission frame formats