Abstract:
According to an aspect, there is provided a method and an apparatus for providing operating mode related information in an elevator system comprising an elevator car. It may be determined that the elevator system operates in a special operating mode, the special operating mode comprising a fire alarm mode and/or an evacuation mode. Content to be displayed on a non-functional display portion associated with the elevator car and a functional display portion associated with the elevator car may be determined based at least in part on the special operating mode. The content may be caused to be displayed on the non-functional display portion and the functional display portion.
Abstract:
The elevator comprises a car (10), an electric motor (32), a drive unit (31), and a machinery brake (100). The method comprises moving the car in accordance with a drive profile by adjusting a drive torque of the electric motor, generating a brake dropping command, monitoring the drive torque, and if the drive torque does not follow a desired drive torque change pattern during a predefined time period, indicating that the machinery brake does not work properly, else indicating that the machinery brake works properly.
Abstract:
According to an aspect, there is provided a method for determining a sequence of bus nodes in a multi-drop communication bus. The method comprises for each bus node: sending a request to the bus node using an bus node physical identifier to set its network interface to a test state having known characteristics; transmitting at least one signal to the bus node via the multi-drop communication bus; and measuring from the bus node at least one response signal caused by the at least one signal, and solving the physical order of the bus nodes in the multi-drop communication bus based on the response signals from the bus nodes.
Abstract:
According to an aspect, there is provided a method for remote operation of a plurality of elevators in a centralized manner by a remote service system, the remote service system comprising a remote communication computer and wherein each of the plurality of elevators comprises an elevator controller associated with a communication computer. The method comprises receiving, by a remote service system from the communication computer associated with an elevator, a rescue request associated with the elevator; providing, by the remote service system, a verification to distinguish the elevator associated with the rescue request among the plurality of elevators; enabling, by the remote communication computer, a data connection with the communication computer associated with the elevator to control the verified elevator; and performing, by the remote service system, at least one remote operation associated with the verified elevator using the enabled data connection.
Abstract:
The method comprises calculating a motor torque estimate for an electric motor of the elevator in an elevator run, determining a difference between the calculated motor torque estimate and a realized motor torque during the elevator run, generating a signal indicating possible brake dragging based on the difference between the motor torque estimate and the realized motor torque.
Abstract:
An electrical rescue system for rescuing passengers from an elevator car (102) comprises an elevator car (102) movable in an elevator shaft (100) by imbalance between the elevator car (102) and a counterweight (104), a plurality of platform doors (4) providing access to the elevator car (102), and a plurality of normally-closed brakes (160, 162) openable by at least one electromagnet (9) and configured to prevent the movement of the elevator car (102) with respect to the elevator shaft (100) when the at least one electromagnet (9) is not energized and to allow the movement when the at least one electromagnet (9) is energized. The electrical rescue system further comprises an electrical connector (6) located at or in a platform door (4) or its frame structure (5), at or in a number of MAP panels, or at the platform (3), and connected to the at least one electromagnet (9) for supplying electrical current to the electromagnet (9) to energize the electromagnet (9).
Abstract:
According to few examples a safety system, a method and a computer program for an elevator safety system is provided. A first switch configured to detect a first position of a safety device of an elevator. A second switch configured to detect a second position of the safety device. A controller configured to monitor a change of a state of the first switch and a change of a state of the second switch.