Digital control system with Boolean processor
US4165534A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1978 |
| Grant date | Aug 21, 1979 |
| Priority date | — |
| Expiry date | Jun 1, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/15127
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An eight-bit microprocessor sequentially reads controller type instructions from a memory and applies the operation codes of selected ones of the instructions to a hardwired Boolean processor. The microprocessor also couples status words between an I/O image table stored in the memory and the I/O interface racks which connect the programmable controller to the machine being controlled. In general, those controller type instructions which are word oriented are executed by the microprocessor and those which are single-bit oriented are executed by the Boolean processor. The Boolean processor is operable in combination with the microprocessor to examine selected status bits in the I/O image table and to set selected status bits therein to a logic state which is determined in part by the state of the examined status bits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.