Apparatus and method for controlling a system process
US5581759A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 15, 1994 |
| Grant date | Dec 3, 1996 |
| Priority date | — |
| Expiry date | Aug 15, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/13122
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A process controlling method and apparatus which uses a flowchart language program and ladder programs with an intermediate register accessible using the same name by both the flowchart language program and the ladder programs. Each ladder program defines the operation of a machine, including an interlock condition of the machine operation. The flowchart language program defines an automatic operation flow which sequentially activates the ladder programs using the data in the intermediate register. This arrangement allows the flowchart language program to be separated from the ladder programs improving productivity, serviceability and security of the programs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.