| 摘要 |
PURPOSE:To highly speed up the monitor control of control stations to be controlled from a slave control station, by adding a return code selected by the slave control station, in a power system monitor system which monitors the entire system at the main control station. CONSTITUTION:A master control station 1 monitors all of control stations 3a-3n to be controlled via a transmission line t2. Slave control stations 2a-2n are coupled with the control stations 3a-3n via a data relay device provided at the master control station 1 by 1:1. The data relay device transmits the state of control stations to be controlled, selected by the slave control station by adding a return code of the control station to be controlled, selected by the slave control station to all the information words transmitted from the master to slave control station. In the slave control station, in every time when the informaion word is received, the control station to be controlled selected by itself and the return code added to the information word are collated and the coincident information is sequentially processed, allowing to speed up the monitor control job of the control to be controlled station by the slave control station. |
