Programmable controller acting as a master station and having automatic control of interlock process by using an operation complete address flag
US5437048A · kind A · utility
3Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1994 |
| Grant date | Jul 25, 1995 |
| Priority date | — |
| Expiry date | Aug 1, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/13017
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system comprising a master station and one or plural slave stations connected in sequence wherein the master station utilizes a data processing module having an operation processor for cyclically executing a sequence program comprising a plurality of data link instructions. The execution of an individual data link instruction is protected by an interlock which remains in effect between the start of an instruction and its end. A macro instruction executable by the operating system is operative to automatically process the interlock, to avoid the necessity of including interlock processing in the sequence program itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.