| 摘要 |
PURPOSE:To prevent error in mode setting due to double ON turning, by forcing to shift to a specified mode output state when two or more slide switch contacts are turned on simultaneously. CONSTITUTION:When adjoining two contacts among slide switch contacts TD- OFF, for example, TD and TS, are simultaneously turned on due to some cause, since the D input ends of FF1 and FF2 become H, the output of AND gate AND1 becomes H and the output of OR gate OR1 also becomes H. As a result of this, clock pulse CK2 is applied to FF6, thereby turning its Q output to H. This Q output H causes the output of OR2 to become H, and is inverted by an inverter INV to become L, which is applied to the other input ends of AND13-AND16, so that the outputs of AND13-AND16 are always kept at L. Thus, when two or more contacts among contacts TD-OFF are turned on simultaneously, the mode output of the switch input circuit is forced to move to OFF mode. |
