A position reference device for an elevator includes a magnet disposed at a stopping position of an elevator car at a landing within a hoistway, a magnetic sensor mounted on the elevator car for detecting magnetic intensity of the magnet by a plurality of points arranged in the vertical direction of the magnetic sensor, and a processing device for determining a vertical center of the magnet.

A method includes determining that an elevator car is arriving at a landing at which re-leveling is anticipated; upon the elevator car arriving at the landing at which re-leveling is anticipated, initiating the at least one of a brake cycling operation and a power cycling operation to reduce elevator car sag at the landing; monitoring transfer of weight to or from the elevator car at the landing over a period of time; terminating the at least one of the brake cycling operation and the power cycling operation upon at least one of (i) the transfer of weight to or from the elevator car at the landing over the period of time being less than a threshold and (ii) the elevator car sag at the landing meeting a sag threshold.

A method includes determining that an elevator car is arriving at a landing at which re-leveling is anticipated; upon the elevator car arriving at the landing at which re-leveling is anticipated, initiating the at least one of a brake cycling operation and a power cycling operation to reduce elevator car sag at the landing; monitoring transfer of weight to or from the elevator car at the landing over a period of time; terminating the at least one of the brake cycling operation and the power cycling operation upon at least one of (i) the transfer of weight to or from the elevator car at the landing over the period of time being less than a threshold and (ii) the elevator car sag at the landing meeting a sag threshold.

A method of verifying configuration parameter changes in an elevator safety system includes detecting (100) a change in one or more of the configuration parameters stored in the memory; putting (102) the elevator system into an out-of-service mode; carrying out (104) a functional test of the elevator safety system to verify an appropriate safety action; and then putting (108) the elevator system back into an in-service mode.

A method of verifying configuration parameter changes in an elevator safety system includes detecting (100) a change in one or more of the configuration parameters stored in the memory; putting (102) the elevator system into an out-of-service mode; carrying out (104) a functional test of the elevator safety system to verify an appropriate safety action; and then putting (108) the elevator system back into an in-service mode.

An elevator system includes a device for obtaining an indication of a heavy object to be transported with the elevator system; a device for allocating an elevator car to transport the heavy object; and a device for activating, in response to the indication, at least one pre-emptive action associated with the allocated elevator car in an adjustment mode. The adjustment mode is configured to substantially maintain a vertical position of the elevator car in an elevator shaft when the heavy object is loaded into the elevator car.

An elevator system includes a device for obtaining an indication of a heavy object to be transported with the elevator system; a device for allocating an elevator car to transport the heavy object; and a device for activating, in response to the indication, at least one pre-emptive action associated with the allocated elevator car in an adjustment mode. The adjustment mode is configured to substantially maintain a vertical position of the elevator car in an elevator shaft when the heavy object is loaded into the elevator car.

Embodiments are directed to determining that an elevator car of an elevator system is approaching a landing, obtaining, by a controller, a value for at least one parameter associated with the elevator system based on the determination that the elevator car is approaching the landing, determining that the elevator car arrives at the landing within a threshold distance, determining, by the controller, when to engage in at least one of a brake cycling operation and a power cycling operation based on the value for the at least one parameter and based on determining that the elevator car arrives at the landing within the threshold distance, and initiating the at least one of a brake cycling operation and a power cycling operation at a time corresponding to the determination of when to engage in the at least one of a brake cycling operation and a power cycling operation.

Embodiments are directed to determining that an elevator car of an elevator system is approaching a landing, obtaining, by a controller, a value for at least one parameter associated with the elevator system based on the determination that the elevator car is approaching the landing, determining that the elevator car arrives at the landing within a threshold distance, determining, by the controller, when to engage in at least one of a brake cycling operation and a power cycling operation based on the value for the at least one parameter and based on determining that the elevator car arrives at the landing within the threshold distance, and initiating the at least one of a brake cycling operation and a power cycling operation at a time corresponding to the determination of when to engage in the at least one of a brake cycling operation and a power cycling operation.

An illustrative example embodiment of an elevator brake device includes a brake member configured to move into a braking position to resist movement of an elevator car associated with the brake device. A plurality of actuators are associated with the brake member and selectively controllable to apply a force to cause the brake member to move into the braking position. A brake controller determines a number of the actuators to activate based on a determined load of the elevator car associated with the brake device.