| 摘要 |
PURPOSE:To detect a program abnormal running not detected by the supervisory time system by adopting the constitution that an operating state signal of a computer is converted into a program running state signal and the signal is compared always with a normal running pattern. CONSTITUTION:The operating state signal of the computer B is fetched sequentially to a signal converting circuit 1 and converted into a program running state signal according to address information set to an address setting device 6. The program running state signal obtained sequentially in this way and the running pattern at normal operation stored in a pattern memory 2 are compared always by a comparator circuit 3, and when the state dissident with any running pattern is consecutive for a prescribed time, it is discriminated that the program runs abnormally, a signal generating circuit 4 is driven so as to output externally a program abnormal running detecting signal d2. Thus, the program abnormal running of the form not detected by the supervisory timer system is detected. |
