| 摘要 |
PURPOSE:To stop safely an apparatus to be controlled, by constituting the titled device so that a user can set optionally in advance whether an output is held or not when a device is stopped, without requiring a complicated program and an external circuit at the time of a test working and an adjustment, etc. CONSTITUTION:A control output signal outputted from an operating part AL is stored temporarily in flip-flop groups FF1-FFm. Also, a reset signal is supplied to these flip-flop groups FF1-FFm through gates G1-Gm. As for these gates G1- Gm, the conduction is controlled by switches S1-Sm which can set on the off manually or by a program, therefore, for instance, if they are set in advance so that the switch S1 is closed, the device is stopped, and even if a reset signal is outputted from the operating part AL, it is obstructed by the gate G1. In this way, the flip-flop FF1 can hold continuously a state which is immediately before the device stops. |
