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PLC executive with integrated web server

  • US 6,640,140 B1
  • Filed: 10/10/2000
  • Issued: 10/28/2003
  • Est. Priority Date: 10/10/2000
  • Status: Expired due to Term
First Claim
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1. A controller for use as part of an industrial control system or as part of an automated system, the controller for controlling at least one input/output device, the controller capable of interacting with a remotely located computer via a network, the controller comprising:

  • a) means for executing a controller scan including solving ladder logic associated with the at least one controlled input/output device, the controller scan having a predetermined scan rate;

    b) a web server for gathering data relevant to a control function, the web server being responsive to a request for the data from the remotely located computer; and

    c) web pages comprising data and associated instructions retrievable and executable by the remotely located computer, the instructions causing the remotely located computer to present the data for display in a predetermined format;

    wherein in response to a request for data, the web server provides one or more web pages in which the requested data are displayed, and further wherein the web server and the means for executing a controller scan are hosted by a same programmable logic controller device.

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