| 摘要 |
PURPOSE:To prevent an information processing system from disturbance at the time of fault by collating the calculated result of values obtained by reading out twice from a numeral generating circuit with the calculated result by a service processor to control transfer. CONSTITUTION:The service processor 1 executes the same calculation as an arithmetic circuit 20 for two contents (D1, D2) received from the numeral generating circuit 10. The information to be sent to the information processing system 23 and the calculated result are set up in areas 9-1, 9-2 of a buffer register 9, respectively. The arithmetic circuit 20 executes the same calculation for the contents (D1, D2) of buffer registers 13, 14 as the sevice processor 1 and a collating circuit 21 collates the calculated result with the contents of the area 9-2 in the buffer register 9. If both contents coincide with each other and a coincidence signal 210 is outputted, an AND circuit 22 is actuated and the contents of the area 9-1 in the register 9 are sent to the information processing system 23 through the AND circuit 22. |
