A decentralized network control system

The present invention relates to a distributed control system network architecture comprising: a common segment beyond design basis accidents and network switches connected to the network segment, the network beyond design basis accidents and seismic monitoring system connected to the switch, and monitored by the earthquake trigger control signal system, implement the functions between the segment and common beyond design basis accidents automatic switching network; beyond design basis accidents separate network device connected to an uninterruptible power supply, beyond design basis accidents and network equipment segment seismic are class I devices; network further comprises a real-time data and non-real time data network, and the server PC simultaneously connected to two networks; built-in controller and the host computer has a hardware encryption chip; the present invention enables the transmission network hardware encryption chip reliability of the code; in BDBA conditions, DCS, and respective network devices do not fail; real-time data and non-real-time data streaming, reduce network load; analog SOE facilitate recall after the accident.