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Indirect referencing in process control routines

  • US 6,385,496 B1
  • Filed: 03/12/1999
  • Issued: 05/07/2002
  • Est. Priority Date: 03/12/1999
  • Status: Expired due to Term
First Claim
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1. A process control system for use in controlling a process, comprising:

  • a controller;

    a memory; and

    a control routine used to control at least a portion of the process;

    wherein the control routine is stored in the memory, the controller creates an executable version of the control routine and controls the portion of the process by executing the executable version of the control routine; and

    wherein the control routine includes a dynamic reference parameter having multiple attributes including a reference attribute that holds a field value specifying a field to which the dynamic reference parameter points and that can be assigned after creation of the executable version of the control routine and wherein said field value specifies a field having multiple attributes.

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