| 摘要 |
PURPOSE:To secure the early detection for the error by performing the diagnosis program in the time-division way and under execution of the control program. CONSTITUTION:The control program and the diagnosis program are carried out in the 6:2 ratio. The diagnosis program detects the error and then sets up the error display bit. While the control program examines the state of the error display bit and then informs the error occurrence to the higher-rank unit in case the error is detected. When Set P1 features logic ''1'', FF4 is set and then reset when Reset P1 features logic ''1'' each. With setting of FF4, control program execution timing T1 becomes logic ''1'', and the control program is carried out while signal T1 features logic ''1''. FF5 is set when Set P2 features logic ''1'', and thus diagnosis program timing signal T2 features logic ''1'' for execution of the diagnosis program. |
