Monitoring apparatus for control system with microcomputer
US5113504A · kind A · utility
19Cited by
12References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 7, 1989 |
| Grant date | May 12, 1992 |
| Priority date | — |
| Expiry date | Apr 7, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/24125
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A monitoring apparatus for a control system including a microcomputer which can output a microcomputer reset signal only once or repeatedly if a program run pulse signal outputted from the microcomputer stops oscillating for longer than a first predetermined time interval T.sub.1 and an additional trouble detection command signal if the program run pulse signal stops oscillating for longer than a second predetermined time interval T.sub.2 which is longer than time interval T.sub.1. In response to this trouble detection command signal, an alarm lamp is lit up and/or the control system is disabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.