Safety controller and safety control method
US8457766B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2011 |
| Grant date | Jun 4, 2013 |
| Priority date | — |
| Expiry date | Jan 31, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/34383
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Time partitions which need not be executed can be skipped. An OS partially includes a partition scheduler which selects and decides a time partition to be subsequently scheduled in accordance with a scheduling pattern including TP1 in which an execution time is allocated to a safety monitoring program, TP2 in which the execution time is allocated to a normal control program, and TP 3 in which the execution time is allocated to a safety control program. A processor executes the OS to cause the partition scheduler to periodically operate. The partition scheduler skips a TP including a program which need not be executed among TPs included in the scheduling pattern, in response to a notification of an execution result from a program executed in at least one of the time partitions TP1 to TP3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.