Logic controlled plastic molding machine with programmable operator interface

  • US 5,062,052 A
  • Filed: 06/20/1989
  • Issued: 10/29/1991
  • Est. Priority Date: 06/20/1989
  • Status: Expired due to Term
First Claim
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1. A plastics molding machine comprising:

  • a plurality of operable machine elements interconnected and interrelated so as to perform a plastics forming process in response to a plurality of program controlled output signals which include a plurality of analog output signals and a plurality of digital output signals;

    means for generating a plurality of feedback signals, including analog feedback signals and digital feedback signals, in response to information from said process and information from the operation of said machine elements;

    a real time analog signal processor including means for generating said plurality of analog output signals in real time response to a plurality of real time control signals, and means for generating process monitoring signals in response to said analog feedback signals;

    means for generating said plurality of digital output signals in real time response to a plurality of real time control signals, and means for generating process monitoring signals in response to said digital feedback signals;

    a dedicated programmable logic process controller having programmed means for generating, in real time, said real time control signals, in accordance with a predetermined combination and sequence of steps and in accordance with a plurality of command signals;

    an operator station including data entry means for accepting manually initiated input signals from an operator, and including display means for communicating visually perceivable process information to said operator in response to video signals;

    an operator station interface including a programmable general purpose digital computer having at least two inputs including a command data input connected from said operator station and a monitoring data input connected from said controller, and having at least two outputs including a display signal output connected to said operator station and a command signal output connected to said controller;

    means included in said controller for communicating said monitoring signals to said monitoring data input of said operator station interface; and

    programmed means in said operator station interface for controlling the operation of said computer to generate video signals on said display signal output in response to input signals on said command data input and in response to monitoring signals on said monitoring data input, and to generate command signals on said command signal output in response to input signals on said command data input and in response to monitoring signals on said monitoring data input.

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