SAFETY CONTROLLER

摘要

This invention has a processor (11) and a memory (12). The memory has a first memory region (12A), and a second memory region (12B) having a different address from that of the first memory region. The processor has: an execution controller (13) for executing a first process procedure including program processing of input data written into the first memory region, and a second process procedure including program processing of input data written into the second memory region and addition of redundancy code to output data written into the second memory region; a result comparison unit (14) for performing a comparison between output data to which the redundancy code has been added in the first process procedure and output data to which the redundancy code has been added in the second process procedure; a fault diagnosis unit (15) for diagnosing the presence or absence of a fault in the processor or the memory; and an abnormality processor (16) for discontinuing the outputting of the output data when an abnormality is detected in any one of the redundancy test, the comparison performed by the result comparison unit, and the diagnosis performed by the fault diagnosis unit.