System for sharing data between microprocessor based devices
US5245704A · kind A · utility
127Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1990 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Mar 22, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B19/052
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system allows for transferring messages between microprocessor based devices, such as programmable logic controllers (PLC), and a host computer over an Ethernet communications network. At the host computer level, these messages can be directed globally or locally. The host computer can immediately obtain messages from a programmable logic controller without interruption of the execution of the PLC's ladder program. The host computer can also receive unsolicited messages from the PLC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.