Patent ID: 9695016
Date: 2017-07-04
CPC Classifications: B66B

Claim:
1. A method of checking a functional capability of a safety element of a safety circuit in an elevator installation, wherein the safety element is connected with a control unit by a communications network for monitoring a component of the elevator installation, comprising: providing the safety element with a first processing unit and a second processing unit each connected to the communications network, the first and second processing units also being directly connected by a connection, wherein the second processing unit sends to the control unit a state signal representing a state of the component being monitored by the safety element; generating a provided signal from the first processing unit in response to a communication received from the control unit; transmitting the provided signal from the first processing unit directly to the second processing unit through the connection; detecting the provided signal received through the connection with the second processing unit; communicating the provided signal as a communicated signal from the second processing unit to the control unit by the communications network; and checking a validity of the communicated signal by the control unit, wherein the communicated signal is compared by the control unit with the communication, wherein the communicated signal is invalid and a functional incapability of the safety element is present if the communicated signal and the communication do not correspond with one another, and wherein the control unit controls the elevator installation in response to a result of the validity checking by bringing an elevator car of the elevator installation to a stop in response to the communicated signal being invalid and the functional incapability of the safety element being present.