US 10,703,604 B2Granted

Method and control unit for checking elevator system safety functions

AssigneeInventio AG

InventorsAstrid Sonnenmoser, Ivo Lustenberger, Martin Hess

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Abstract

An elevator system includes a control unit, a bus, a plurality of bus-nodes connected via the bus with the control unit, and a plurality of safety-state detection devices connected with the control unit via the bus-nodes. A method of commissioning the elevator system includes the steps: A) verification by the control unit of the safety-state detection means that are connected to the bus; B) checking of the functional capability of the safety-state detection means that are connected; C) checking by the control unit of the safety functions of the elevator system based on a change in state of a safety-state detection means; and D) release of the elevator system for a normal operation only after positive execution by the control unit of the steps A) to C), wherein the release is accompanied by a change in state of the control unit from an unsecured state into a secured state.

Claims17

Dependent claims

A method for commissioning an elevator system having a control unit, a bus, a plurality of bus-nodes being connected via the bus with the control unit, and a plurality of safety-state detection devices each being connected with the control unit via one of the bus-nodes, wherein the method comprises the steps of:

A) verification by the control unit of the safety-state detection devices that are connected to the bus;
B) checking by the control unit of a functional capability of each of the safety-state detection devices that is connected to the bus;
C) checking by the control unit of safety functions of the elevator system based upon a change of state of at least one of the safety-state detection devices by the control unit;
D) release of the elevator system for a normal operation only after positive execution by the control unit of the steps A) to C), wherein the release for the normal operation is accompanied by a change of state of the control unit from an unsecured state to a secured state;
and
E) wherein the elevator system includes an interface for entering configuration commands to the control unit and wherein the entry of the configuration commands at the interface is at least one of only accepted in the unsecured state of the control unit and reiected in the secured state of the control unit.

3 more elements

An apparatus for commissioning an elevator system having a control unit, a bus, a plurality of bus-nodes being connected via the bus with the control unit, and a plurality of safety-state detection devices each being connected with the control unit via one of the bus-nodes, comprising:

the control unit being configured to only release the elevator system for a normal operation when the control unit has verified the safety-state detection devices that are connected to the bus, to check a functional capability of the safety-state detection devices that are connected to the bus, and, based on a change in state of any of the safety-state detection devices, checks safety functions of the elevator system, wherein the release of the normal operation is accompanied by a change in state of the control unit from an unsecured state into a secured state;
and
an interface for entry of configuration commands to the control unit, wherein the control unit at least one of accepts the entry of the configuration commands at the interface in the unsecured state and, in the secured state, rejects the entry of the configuration commands at the interface.

Dependencies are inferred from the claim text.

Facts

Application: 15/533,726Filed 7 Dec 2015
Priority: EP 1419754412 Dec 2014
Published: US 2017/0320703 A19 Nov 2017
Granted: 7 Jul 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

B66B 1/28
Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration: electrical
B66B 1/32
Electrical: effective on braking devices , e.g. acting on electrically controlled brakes
B66B 1/3407
Details , e.g. call counting devices, data transmission from car to control system, devices giving information to the control system: setting or…
B66B 5/0031
Devices monitoring the operating condition of the elevator system: for safety reasons