SAFETY DEVICE FOR ACTUATOR CONTROL CIRCUIT

摘要

PURPOSE:To improve the safety of an actuator control circuit by securing such a constitution where both a microcomputer and a microcomputer monitor circuit monitor the abnormality with each other so that the malfunctions of an actuator can be effectively avoided. CONSTITUTION:A microcomputer monitor means 6 is added to a control circuit for an actuator 2 to monitor the working state of a microcomputer 1. While the microcomputer 1 contains a means to monitor the working state of the means 6. Thus, a circuit is constituted so that both the microcomputer 1 and the means 6 monitor the abnormality with each other. Then, the microcomputer 1 and the means 6 display the alarms to cut off an actuator drive circuit when they detect the abnormality with each other. Thus, the malfunctions of the actuator 2 are prevented and the safety of the actuator control circuit is improved.