Fault location device, communication device, and fault location method
US8015445B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 6, 2009 |
| Grant date | Sep 6, 2011 |
| Priority date | — |
| Expiry date | Oct 3, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/40273
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A fault location device detects a communication device connected to a broken communication line from among communication devices that carry out communications between each other through a two-wire communication line. The communication device, when detecting a communication error, stores communication error time and a communication error counter accumulated value indicating accumulated counts of the communication error, changes into a bus off state on the basis of the communication error counter accumulated value, and, after a predetermined period of time, returns from the bus off state. The fault location device includes an acquisition unit that acquires the communication error time and communication error counter accumulated value, stored in each communication device; and a detection unit that detects a communication device connected to a broken communication line on the basis of variations in the communication error counter accumulated values while any one of the communication devices is in a bus off state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.