Electronic controller for cyclically operating machinery
US4631722A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 11, 1983 |
| Grant date | Dec 23, 1986 |
| Priority date | — |
| Expiry date | Oct 11, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16P3/20
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An electronic controller with safety facilities for a device with mechanical motion sequences with two differently designed safety channels, of which the first safety channel is constructed with hard-wired switching logic and the second according to microcomputer technology, comprises a safety stage common to both safety channels which places the device in a safe state upon the appearance of unequal output signals appear in the safety channels. Such a controller is to be improved with respect to system safety and availability for utilization with cyclically operating devices. At the same time, the least possible structural complexity is to be achieved. To this end, the safety channels assume identical control functions simultaneously. Furthermore, each safety channel is equipped with self-check facilities whose signals, together with the comparison result of a comparison of the output signals of the two safety channels, act upon a safety stage which places the device in a safe state when malfunctions arise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.