| 摘要 |
Provided is a method in which a communication state between a main control unit and each sub control unit can be judged to be normal or abnormal, in a condition where a noise may be generated from a drive system power line. This method includes a power supply step s 4 , a test communication step (see arrows ( 3 ) and ( 4 )), and a judgment step s 6 . In the power supply step s 4 , power is supplied to first sub control units 2 a from a drive system power source 6 while no power is supplied to actuators 7 from the power source 6 . In the test communication step, communication of a test signal is performed between the main control unit 1 and each of the sub control units 2 . In the judgment step s 6 , whether the communication state is normal or abnormal is judged based on the result of the communication of the test signal between the main control unit 1 and each of the sub control units 2. |
