Programmable controller data communications using variable names associated with data addresses
US6327509A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 1998 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Dec 22, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/25171
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An enhanced programmable controller for enabling access to data using internal variable names and public variable names on a communication control interface. The enhanced programmable controller includes a data storage device for storing data required for control. A program memory stores a sequential program. A communication interface communicate with other programmable controllers. A central processing unit executes the sequential program and controls a variable name conversion unit. The variable name conversion unit converts variable names, that are actual functional names, into physical addresses when variable name access is demanded from other programmable controllers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.