Port 20000
DNP3
DNP3 (Distributed Network Protocol) is a robust communication protocol widely used in SCADA (Supervisory Control and Data Acquisition) systems to enable reliable data exchange between control equipment such as Remote Terminal Units (RTUs) and Intelligent Electronic Devices (IEDs). Designed for electrical and utility automation sectors, DNP3 ensures efficient and dependable device interoperability across complex supervisory networks..
Technical Details
DNP3, or Distributed Network Protocol version 3, is a layered communication protocol predominantly employed in process automation systems within the electric utility industry. It facilitates the transfer of data between control centers and field devices including RTUs, IEDs, and Master Stations. Its design emphasizes reliability, even over unreliable or noisy communication channels, supporting both serial and IP-based transport layers.
The protocol accommodates event-driven reporting and time synchronization, contributing to efficient bandwidth usage and accurate control operations. It supports multiple object groups and variations, enabling flexible message definitions according to the needs of utility applications. DNP3 can be deployed over various physical layers, such as RS-232, RS-485, or Ethernet, making it adaptable to new and legacy environments.
DNP3 is structured according to layered architecture principles, incorporating link, transport, application, and physical layers. This modular architecture enhances interoperability while streamlining data acquisition processes. It can operate in both unsolicited response and polling modes, allowing for timely status updates from field devices to control centers.