| 摘要 |
A control apparatus for an elevator according to this invention comprises a signal setter for setting a new value instead of a value of great variation when at least one signal at the present time among a transmission reference speed command signal transmitted to a speed controller through a transmission interface, a cage speed signal, and a controlled variable based on these signals greatly varies as compared with the time-serial value of the corresponding signal detected in the past. In this invention, the signal setter stores a value at the present time and also stores serially past values with respect to time as to the transmitted reference speed command signal, the cage speed signal, or the controlled variable based on these signals, and it sets the new value not greatly varying, as a present value if the value at the present time greatly varies in view of the past serial values of the corresponding signal. Accordingly, even if any of the transmission interface, cage speed signal-detector, etc. should fail or operate erroneously, the safety of passengers can be secured, and the elevator equipment can be prevented from being damaged.
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