Cincinnati Milacron Inc.

Edward Scott Jeremiah

Kenneth Erwin Schubeler

Eric Randall Kline

A diagnostic apparatus for use with a programmable machine function controller having a memory for storing a machine control program wherein the controller continuously scans the memory and generates output signals in response to input signals having signal states corresponding to the desired states as defined by the machine control program. The diagnostic apparatus includes a second program for testing the input signals as they are required by the machine control program to execute cycle steps and cycles of operation relative to the machine. The diagnostic apparatus operates asynchronously with the machine function controller to sequentially check the cycles of operation, many of which may be occurring simultaneously. In checking each cycle of operation, the diagnostic apparatus checks each cycle step and further checks the state of each input signal associated with each cycle step. The diagnostic apparatus is operative to continuously display a representation of the failure conditions detected. Finally, the apparatus detects and displays a representation of input signal failures which are independent of any of the cycles of operation associated with the machine.

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Cincinnati, OH, United States of America

Edward Scott Jeremiah