![]() ![]() Inter-Control Center Communications Protocol To meet these special requirements for communication and co-ordination between control centres the IEC developed the IEC 60870 set of standards. ![]() However, none of these communication protocols were suited to the requirements of communicating between control centres. These were followed by the development of "open" industry-standard protocols such as DNP3 and IEC 61850. Initially individual SCADA manufacturers developed their own proprietary "closed" protocols for communicating from a control centre to electrical equipment in the field. However, the development of SCADA ( supervisory control and data acquisition) systems allowed remote control and monitoring of electrical plant from centralised control centres. Prior to the development of electronics and telecommunications networks all co-ordination between control centres was carried out by telephone.
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