| 摘要 |
PURPOSE:To handle easily the abnormal processing by cascade-connecting FFs corresponding to the man-hour in a ring shape by means of interposing a delay means between FFs. CONSTITUTION:A sequence control circuit 15 is provided with RS.FFs19 corresponding to the man-hour, and a man-hour checking timer 20 is interposed as a delay means between the RS.FFs, whereby FFs19 are cascade-connected in a ring shape. Thus when an electric power source is turned on, a power-on reset signal P.ON.R is generated. The FF19 in a step 1 is set, while FFs 19 in other steps are reset through an OR gate 21. When jump conditions are not satisfied and only jogging conditions are satisfied, the man-hour checking timer 20 in the posterior stage starts its action after the setting. When the jogging conditions are satisfied after setting the set time, the FF19 in a step 2 is set, while the FF19 in the step 1 is reset. Afterwards the similar action is repeated. |
