Programmable controller processor module having multiple program instruction execution sections
US5212631A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1992 |
| Grant date | May 18, 1993 |
| Priority date | — |
| Expiry date | Apr 24, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B19/052
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A programmable controller has a rack that electrically connects a number of I/O modules to a processor module. The processor module includes a external device communication interface section and a general purpose processor section electrically coupled together by a set of common buses. Both of these module sections include a microprocessor and memory connected by an internal set of buses which are isolatable from the set of common buses. The isolation capability permits the different sections to perform their operations simultaneously. A shared system memory and an rack interface are coupled to the common buses for the exchange of data with the I/O modules. A unique ladder logic processor also is connected directly to the common buses. The ladder logic processor includes a hardwired Boolean bit logic processor and a custom microcoded processor to execute instructions of a ladder type control program. Program instructions which are too complex for execution by the ladder logic processor are executed by the general purpose processor section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.