| 5251302 |
Network interface board having memory mapped mailbox registers including alarm registers for storing prioritized alarm messages from programmable logic controllers |
Edward H. Weigl, Steven Gans |
1993-10-05 |
| 5245704 |
System for sharing data between microprocessor based devices |
Mark S. Weber, Joseph Bronikowski, Brian T. Hill |
1993-09-14 |
| 5163151 |
System for processing and prioritizing alarms from devices on data communications network |
Joseph Bronikowski, Brian T. Hill, Mark S. Weber |
1992-11-10 |
| 5159673 |
Apparatus for networking programmable logic controllers to host computers |
Brian T. Hill, Joseph Bronikowski, Mark S. Weber |
1992-10-27 |
| 5151978 |
LAN interface which permits a host computer to obtain data without interrupting a ladder program executing in the interface |
Joseph Bronikowski, Brian T. Hill, Mark S. Weber |
1992-09-29 |
| 5131092 |
Communication system enabling programmable logic controllers access to host computer tasks and host computer access to programmable logic controllers without polling |
Brian T. Hill, Joseph Bronikowski, Mark S. Weber |
1992-07-14 |