A network interface board provides a communication link between a personal computer and a network bus connecting a plurality of programmable logic controllers. The network interface board mounts in an expansion slot of the personal computer. The programmable logic controllers control the operation of...http://www.google.fr/patents/US5251302?utm_source=gb-gplus-shareBrevet US5251302 - Network interface board having memory mapped mailbox registers including alarm registers for storing prioritized alarm messages from programmable logic controllers
Network interface board having memory mapped mailbox registers including ...
