Internet web interface including programmable logic controller for controlling output devices based on status of input devices
April 30, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesIndustrial communications network with mastership determined by need Programmable controller with multiple task processors Function-distributed control apparatus System for modifying a machine's program at a remote location User interface with multiple workspaces for sharing display system objects Remote terminal industrial control communication system Communication system enabling programmable logic controllers access to host computer tasks and host computer access to programmable logic controllers without polling Modular digital telephone system with fully distributed local switching and control Distributed logic control system and method Apparatus for networking programmable logic controllers to host computers Inventors
AssigneeApplicationNo. 303458 filed on 04/30/1999US Classes:709/218, Using interconnected networks709/230, COMPUTER-TO-COMPUTER PROTOCOL IMPLEMENTING709/250NETWORK-TO-COMPUTER INTERFACINGExaminersPrimary: Lim, KrisnaAttorney, Agent or FirmForeign Patent References
International ClassesG06F 013/14G06F 013/00 AbstractA control system includes an Internet web interface to a network of at least one programmable logic control system running an application program for controlling output devices in response to status of input devices. The Web interface runs Web pages from an Ethernet board coupled directly to the PLC back plane and includes an HTTP protocol interpreter, a PLC back plane driver, a TCP/IP stack, and an Ethernet board kernel. The Web interface provides access to the PLC back plane by a user at a remote location through the Internet. The interface translates the industry standard Ethernet, TCP/IP and HTTP protocols used on the Internet into data recognizable to the PLC. Using this interface, the user can retrieve all pertinent data regarding the operation of the programmable logic controller system. | |
