| 摘要 |
PURPOSE:To grasp the working state of each program by supervising the presence or absence of a response with respect to a supervisory interruption transmitted to a wording program and considering the program to be a trouble when a normal response is not present. CONSTITUTION:When the supervisory interruption 21-1 is received from a system supervising equipment 3, a supervisory monitor 221 in the program 21 supervises a period from the time when the execution of a subtask 212 starts to the time when the execution terminates, and considers the subtask 222 to be normal when it terminates during the prescribed period and to be a trouble when it does not terminate. In such a way the supervisory monitor 211 suppresses the response with respect to the supervising equipment 3 when a trouble develops on the execution of a business program 212. If the supervisory monitor 211 itself is troubled, naturally the response with respect to the supervising equipment 3 is not returned. Actions of supervisory monitors 221 and 231 in programs 22 and 23 and those of business programs 22 and 232 are equal to that of the program 21. |
