Programmable controller with multiple functions
US4455621A · kind A · utility
21Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1981 |
| Grant date | Jun 19, 1984 |
| Priority date | — |
| Expiry date | Dec 7, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/15078
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A programmable controller includes a memory which stores an I/O image table and a data table. An I/O scanner module updates the I/O image table with the status of I/O devices connected to the programmable controller. The processor executes a control program to perform logical and arithmetic operations on the data in the data table. Such operations may be performed on data of different types and any necessary data conversions are performed automatically. Also, such operations may be performed on entire data files without degrading the response time of the programmable controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.