Westinghouse Electric Corporation

Jeffrey W Blain

Denis D Shah

Jean Chen

Robert C MacDonald

Marjorie J Polis

Matthew Martin

Richard H Ludwig

Elsa Abrego

Jon Howard

Gerald M Rees

An elevator control system with a local area network on the traveling cable and distributed control circuit safeguard for loss of remote microprocessor control with a car door open when floor releveling distance exceeds the landing zone limit. The elevator control circuit is interactive with the car driving apparatus and with the car door circuit so that when the driving apparatus for the car is leveling the car for passenger load weight gain or loss, the car door is signaled to remain open in the zone of the target floor so long as the distance that the car moves is within the elevator safety code requirements. A time delay relay interfaced with an output channel circuit of the microprocessor times out to stop car driving apparatus if the distance limit is exceeded.

Elevator system leveling safeguard control and method

An elevator dispatching method which estimates the time of arrival (ETA) of each car at the floor of a hall call to be assigned. A building profile of average door cycle times per floor, over predetermined periods of the day, is tabulated and used in the ETA calculations, to provide more accurate ETA values and thus a lower average call waiting time.

Method for using door cycle time in dispatching elevator cars

An elevator control system and method for efficient failure control of block operation with a local area network on the traveling cable and distributed electronic control circuits in the car and proximate to the respective floors with a remote microprocessor controller for each car. A local area network also provides communication with the corridor fixtures in a serial signal format of input and output signals. Each remote controller includes a microprocessor based computer circuit which normally communicates over a multicar-link with the other and also over the local area networks for car and hall calls. Each controller implements an adaptive time based block operation with the total building being serviced, despite partial or total failure of communication between the controllers and the corridor fixtures, which would otherwise degrade the bank operation sooner and more restrictively.

Elevator system adaptive time-based block operation

An elevator control system and method for efficient failure control with a local area network on the traveling cable and distributed electronic control circuits in the car and proximate to the respective floors with a remote microprocessor controller for each car. A local area network communicates with the corridor fixtures in a serial signal format of input and output signals. Each remote controller includes a microprocessor based computer circuit which communicates over a multicar-link with the other and also over the local area networks for car and hall calls to implement an expanded control strategy with interactive program modes with least restrictive capability. This program interacts with programs for floor control strategy and bank control strategy for the elevator system to select the best car and the most efficient operation, despite failures which would otherwise degrade the bank operation sooner and more restrictively.

Elevator system graceful degradation of bank service

An elevator control system and method with a local area network on the traveling cable and distributed electronic control circuits in the car and proximate to the respective floors with a remote microprocessor controller for each car. A local area network communicates with the corridor fixtures in a serial signal format of input and output signals. Each remote controller includes a microprocessor based computer circuit which communicates over a multicar-link with the other and also over the local area networks for car and hall calls to implement a floor control strategy and bank control strategy for the elevator system to select the best car and the most efficient operation despite failures.

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Scenic Lakes Township, NJ, United States of America

Jeffrey W Blain