Monitoring method for an elevator installation
US8443944B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 4, 2008 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | Apr 16, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/0093
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The monitoring method for an elevator installation includes a control unit and at least one bus junction, which bus junction has a receiver, a transmitter and a safety element. The control unit and the bus junction communicate by way of a bus. The monitoring method has the following steps: a digital default signal is transmitted by the control unit to the receiver; the digital default signal is converted by the receiver into an analog signal; the safety element is acted on by the receiver with the analog signal; if the safety element is closed the analog signal is detected by the transmitter; for a detected analog signal, a digital signal of the control unit is provided by the transmitter; wherein on detection of an analog zero signal a digital signal is transmitted by the transmitter to the control unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.