G05B 2219/21149
If read write error, keep last i-o status for next cycle
Official title: If read write error, keep last I-O status for next cycle
G05B2219/21149 (If read write error, keep last i-o status for next cycle) appears on 3 US grants and 0 published applications in this corpus.
Search patents in G05B- Granted patents
- 3
- Published applications
- 0
- Assignees
- 3
- Inventors
- 5
- Latest grant
- 25 Jun 2002
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Redundant, multitasking industrial controllers with synchronized data tables25 Jun 2002US 6,411,857 B1Rockwell Automation Technologies, Inc.
- Redundant multitasking industrial controllers synchronized data tables15 Jun 1999US 5,912,814 AAllen-Bradley Company, Inc.
- Error control apparatus using restore memory for recovering from parity discordances in transmissions between controller and real-time I/O devices5 Sep 1989US 4,864,531 ALa Telemecanique Electrique
No published applications in this class yet.
Most cited
By later US patents
- Redundant, multitasking industrial controllers with synchronized data tables53US 6,411,857 B1Rockwell Automation Technologies, Inc. · 2002
- Redundant multitasking industrial controllers synchronized data tables17US 5,912,814 AAllen-Bradley Company, Inc. · 1999
- Error control apparatus using restore memory for recovering from parity discordances in transmissions between controller and real-time I/O devices14US 4,864,531 ALa Telemecanique Electrique · 1989