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IEC 60870-5-104
IEC 60870-5-104 is a protocol standard widely used for telecontrol in electric power systems, enabling data exchange for supervisory control and data acquisition (SCADA). Operating over TCP/IP networks, it facilitates real-time monitoring and remote management of electrical grids, substations, and automation devices to ensure reliable power delivery..
IEC 60870-5-104, commonly referred to as IEC 104, is an international standard protocol designed for telecontrol applications in electric power systems. It extends the IEC 60870-5-101 protocol to TCP/IP-based networks, allowing efficient and reliable communication over Ethernet architecture. This protocol supports the transmission of measurements, events, control commands, and other system information required for the monitoring and management of electrical substations and distribution automation systems.
IEC 104 operates within the framework of a client-server model over a reliable TCP/IP transport layer, which ensures proper sequencing, flow control, and guaranteed delivery. The protocol encapsulates application layer data units (ASDUs), facilitating the exchange of real-time data, control instructions, and critical system status between control centers and various intelligent electronic devices (IEDs). Communication typically occurs continuously in near real-time, allowing immediate response to changes in electrical grid conditions.
Because of its reliance on TCP/IP, IEC 104 is suitable for modern network infrastructures and supports integration with existing IT systems. Its design emphasizes interoperability, vendor-independence, and extensibility, making it a preferred choice for utility companies globally seeking to enhance their automation and telecontrol capabilities within their supervisory control environments.