A circuit and method for self-detecting of controller of diesel locomotive

摘要

The present invention relates to a circuit and method for self-detecting of Controller of diesel locomotive. The circuit comprises the controller with its channel PWM and FI connected with each other, its channel DO and DI connected with each other, its channel AO and Al connected with each other, its channel CAN bus connected with the CAN bus of upper computer and its channel RS485 connected with RS485 of upper computer. The controller sets the outputs of channel PWM, DO and AO according to the CAN message sent from upper computer, and returns the detected results at Fl, DI and Al to the upper computer through CAN bus. The upper computer sends life signals to the controller through RS485, the controller returns the received signals back to the upper computer through RS485. The upper computer displays and compares the life signals sent and received by it. The invention substitutes for the mode of manual work, improves significantly the efficiency and accuracy of detection and provides a reliable means for fault diagnosis and maintenance of controller.