Apparatus for networking programmable logic controllers to host computers

A control system for transferring messages between a programmable logic controller (21) and a host computer (25) over an Ethernet communications network (23) is disclosed. The messages include a routing address specifying an originating drop number and a destination drop number and a routing drop nu...

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Bibliographische Detailangaben
Hauptverfasser: BRIAN T HILL, JOSEPH T. BRONIKOWSKI, MARK S WEBER, DAVID J. SACKMANN
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A control system for transferring messages between a programmable logic controller (21) and a host computer (25) over an Ethernet communications network (23) is disclosed. The messages include a routing address specifying an originating drop number and a destination drop number and a routing drop number. The system is responsive to the routing address for transferring the messages between the programmable logic controller (21) and the host computer (25).