Control apparatus for elevator
First Claim
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1. A control apparatus for an elevator having a movable cage comprising:
- a position detector responsive to cage movement;
a non-volatile semiconductor memory means for storing representations of cage position; and
a microcomputer means operated under program control for controlling said position detector to produce signals representing instantaneous cage positions, and for continuously erasing and rewriting contents of said memory based on the signals to provide a continuously updated representation of instantaneous cage position in said non-volatile memory in the event of power failure.
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Abstract
A control apparatus for an elevator comprises a position detector responsive to cage movement, a non-volatile semiconductor memory for storing representation of cage position, and a microcomputer operated under program control for controlling the position detector to produce signals representing instantaneous cage positions and for continuously erasing and rewriting the contents of the non-volatile semiconductor memory based on the position detector signals. Thus, the stored contents can be reliably held even at the time of power failure, so that an expensive backup power source can be dispensed with.
10 Citations
7 Claims
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1. A control apparatus for an elevator having a movable cage comprising:
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a position detector responsive to cage movement; a non-volatile semiconductor memory means for storing representations of cage position; and a microcomputer means operated under program control for controlling said position detector to produce signals representing instantaneous cage positions, and for continuously erasing and rewriting contents of said memory based on the signals to provide a continuously updated representation of instantaneous cage position in said non-volatile memory in the event of power failure. - View Dependent Claims (2, 3, 4, 5)
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- 6. An elevator control apparatus comprising pulse generator means for producing output pulses corresponding to movement of a cage of an elevator, microcomputer means for processing the count value of the output pulses to obtain a cage position and absolute positional data of service floors, and a semiconductor memory which is nonvolatile and which can have its content rewritten, said semiconductor memory being connected to the microcomputer means and including memory means for storing absolute positional data of the service floors.
Specification