| 摘要 |
PURPOSE:To make it possible to diagnose the system electric power supply control unit without connecting the unit type electric power supply control equipment, by converting an electric power supply put-on signal by means of the internal or the external additional device of the system electric power supply control unit. CONSTITUTION:The external additional devices ADP01, ADP02 attached to the outside of the system electric power supply control unit SPC convert an electric power supply put-on signal HOLD from the control unit SPC to an electric power supply on display signal ONI, an electric power supply put-on completion signal COMP, and an electric power supply alarm signal ALM, respectively, and return them to the control unit SPC. The control circuit which has received these converted signals through the multiplexer circuit is able to decide if the circuit is normally operated, by making certain if this signal exists or not. In this way, it is possible to diagnose without connecting the unit type electric power supply control equipment. In this regard, the circuit which operates in the same way as the external additional device can be also provided in the control unit SPC instead of it. |
