| 摘要 |
PURPOSE:To eliminate the need to set the time limit value with a program by discriminating the execution of a circulation of program while counting the timer interruption input frequency every fixed time limit. CONSTITUTION:A basic clock generating circuit 3 which is started by a processor 1 supplies the time-up signal to the processor 1 every fixed limit time, e.g., 10msec. Then the processor 1 counts the interruption input frequency and adds (1) to the contents of an interruption input frequency memory. It is discriminated whether the control program is executed up to the final stage. If the execution is through with a circulation of program, the contents of the interruption input frequency memory are stored in another memory. This program is reset to give a jump to the head address of the program. If the control program is under execution, it is executed continuously. This eliminates the need to set the timer limit value with a program. |
