Multi-tasking operation system for industrial controller
US6009454A · kind A · utility
65Cited by
18References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 10, 1997 |
| Grant date | Dec 28, 1999 |
| Priority date | — |
| Expiry date | Nov 10, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/15079
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A multi-tasking operating system for real-time control of industrial processes integrates ladder type programs and state-type programs by viewing each as a series of instructions with an implicit pointer list pointing to the next instruction. A fixed number of instructions of each program task are executed after which the effective pointer to the next instruction is stored toward the next time that task is invoked. Multiple tasks that need to be coordinated can be linked with subtasks that can be guaranteed complete execution by allocating sufficient instructions to those subtasks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.