| 摘要 |
PROBLEM TO BE SOLVED: To avoid misunderstanding of an error without adding a part by judging that a detecting value by the sensor is a true error when a state where the detecting value by a temperature sensor falls within an error judging range continues for a constant time. SOLUTION: In an error judgment of a sensor, first of all, whether or not a signal from an error judging object sensor falls within an error range is judged (S2). when the signal falls within the error range, whether or not a state of being in the error range continues for a constant time, for example, 30 minutes is judged by using an error counter (S5). When the signal falls wide of the error range in a constant time and returns to a normal state, a judgment is made that it is not a true error. While, when a state of being in the error range continues for a constant time, a judgment is made that a sensor is put in a true abnormal state (S6). Therefore, whether or not the sensor being a judging object falls within a true error range can be accurately judged. |
