| 摘要 |
A control device of an elevator, wherein calculations on the control of the elevator are performed by a double system containing a first processing part and a second processing part. First clock signals from a first clock are inputted into the first processing part. Second clock signals from a second clock are inputted into the second processing part. The first and second clock signals are inputted into a clock abnormality detection circuit. The clock abnormality detection circuit counts the number of pulses of each of the first and second clock signals to detect the abnormality of the first and second clock signals by a difference in the number of pulses therebetween.
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