SYNCHRONIZING METHOD FOR STAND-BY REDUNDANT TYPE COMPUTER CONTROL SYSTEM

摘要

PURPOSE:To prevent the occurrence of bump in the output value of an analog output board by inputting data required for the calculation of a stand-by system MPU shelf from a working system MPU shelf by the stand-by system MPU shelf, and copying it in the stand-by system MPU shelf itself. CONSTITUTION:By inserting transmission boards 11A 11B for synchronization into both the working and the stand-by system MPU shelves 01A, 01B respectively, calculation data to be calculated at calculation control boards 1A, 1B is transmitted from the working system MPU shelf 01A in which the above calculation data is taken into the stand-by system MPU shelf 01B, and the calculated output results of two shelves 01A, 01B are made to coincide with each other. Thus, when abnormality arises in the working system MPU shelf, and a working right is shifted to the MPU shelf having operated in the stand-by system, even if the output data of the analog output board 10 shifts to the data of the stand-by system from the data of the working system till then, the bump comes not to be caused.