Elevator controller
First Claim
1. An elevator control apparatus comprising:
- a processing portion for performing a processing relating to control of an elevator; and
a power supply voltage monitoring circuit for monitoring a power supply voltage supplied to the processing portion, elevator control apparatus being characterized in that;
the elevator control apparatus further comprises a voltage monitoring soundness checking function circuit which is adapted to output a monitoring input voltage forcible change signal for forcibly changing a power supply voltage input to the power supply voltage monitoring circuit in response to a control signal from the processing portion and to which a voltage abnormality detection signal from the power supply voltage monitoring circuit is input;
the voltage monitoring soundness checking function circuit holds at least some of contents of signals exchanged between the processing portion and the power supply voltage monitoring circuit, and the processing portion checks soundness of the power supply voltage monitoring circuit by reading data held by the voltage monitoring soundness checking function circuit.
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Accused Products
Abstract
In an elevator control apparatus, a power supply voltage monitoring circuit monitors a power supply voltage supplied to a processing portion. A voltage monitoring soundness checking function circuit outputs a monitoring input voltage forcible change signal for forcibly changing a power supply voltage input to the power supply voltage monitoring circuit in response to a control signal from the processing portion. A voltage abnormality detection signal from the power supply voltage monitoring circuit is input to the voltage monitoring soundness checking function circuit. The processing portion checks the soundness of the power supply voltage monitoring circuit by reading data held by the voltage monitoring soundness checking function circuit.
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Citations
7 Claims
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1. An elevator control apparatus comprising:
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a processing portion for performing a processing relating to control of an elevator; and
a power supply voltage monitoring circuit for monitoring a power supply voltage supplied to the processing portion, elevator control apparatus being characterized in that;
the elevator control apparatus further comprises a voltage monitoring soundness checking function circuit which is adapted to output a monitoring input voltage forcible change signal for forcibly changing a power supply voltage input to the power supply voltage monitoring circuit in response to a control signal from the processing portion and to which a voltage abnormality detection signal from the power supply voltage monitoring circuit is input;
the voltage monitoring soundness checking function circuit holds at least some of contents of signals exchanged between the processing portion and the power supply voltage monitoring circuit, and the processing portion checks soundness of the power supply voltage monitoring circuit by reading data held by the voltage monitoring soundness checking function circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification