TRANSMISSION FRAME STRUCTURE OF CONTROL COMMUNICATION NETWORK IN DISTRIBUTED CONTROL SYSTEM OF NUCLEAR POWER STATION

摘要

PPROBLEM TO BE SOLVED: To provide a transmission frame structure by which all stations for a process control in a control communication network share monitoring and controlling informations at real time in a distributed control system of a nuclear power station. PSOLUTION: A data of a node having a transmission right is multi-address-called to all nodes through a by-pass line, and a ring accelerating apparatus is used for an alternative pass of transmission data and for an isolation of a damaged station. A management, a damage, and restoration of the communication network are achieved by the transmission frame which consists of a destination address, a transmission node address, a Type/Length field to divide the data frame for control and an event frame or the like, a field for a communication network management to be valid only in the case of designating itself, a Seq&Ver field including the number of times of the transmission of the data frame and an upgrade version information of the frame, an NS_ID field in which a node number to receive a token next is written, a data field which can mount the event frame, and a CRC field. PCOPYRIGHT: (C)2006,JPO&NCIPI