| 摘要 |
PURPOSE:To make easy the operation by the operator, by accessing the measter list in waiting when specially designated or by accessing the master list in operation actually. CONSTITUTION:In the data processing unit redundant with duplex system, the tag number of nests N1, N2 is included in the range of coverage by the upper rank processor muA, and the tag number is controlled with the processor muA and the lower rank processors muB1 and muB2. That is, relating to the control loops, the processors muA and muB1, and muA and muB2 are respectively in backup relation. Further, when the tag number is given from the operator, the presence of backup relation is confirmed through the tag list and accessing is made to the master list in actual operation or to the master list in waiting if especially designated from the operator. Thus, the operation of the operator is made easy. |
