MONITOR SYSTEM FOR OPERATION OF PROCESSOR

摘要

PURPOSE:To improve the defect detecting capacity of a maintenance processor by providing a monitor circuit into a communication bus control to monitor that the communication information is delivered every fixed period from the maintenance processor. CONSTITUTION:An alarm circuit 14 monitors the count defect of time slot in a working mode as well as the defective stack of a DTCHK (time slot holding signal). Furthermore the circuit 14 monitors the time slot allotted to a maintenance processor 2 and delivers an alarm signal 18 to a system switching circuit of the processor 2 when the time slot of the processor 2 is not used for a fixed period or longer. Thus the system switching is performed for the processor 2. The processor 2 reads the state registers of data processors 1-1-1-n or confirms the normal answer to the health checking information. Therefore the time slot allotted to the processor 2 is always used within a fixed period of time as long as the operation of the processor 2 is normal.