Communications control system for elevators
US6450298B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2001 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Aug 16, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B1/3453
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A communications control system for elevators in which synchronization instructions do not result in all units bearing data receiving loads, and smooth data transfer may be realized. A node acting as a master sends synchronization start data to one slave from among many slaves; receives synchronization completion data from the slave, and sends subsequent synchronization start data to a subsequent slave, in order; and adjusts the timing for sending synchronization start data sending so that it matches a target cycle, assuming that an interval for sending the synchronization start data is a synchronization start data sending cycle, based on: amount of time from the sending of the synchronization start data until the receiving of the synchronization completion data; an amount of time required for sending the data, being calculable from the number of sending data stored in a sending buffer until the time of sending; and a target time for the synchronization start data sending cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.