Object-oriented programmable controller

摘要

A controller for one or more pieces of industrial equipment is configured to perform a series of control functions each organized into one or more procedures for performing particular machine actions. The progress of an action, or some parameter of the action-taking machine (which may or may not be associated with an action), is represented by one or more "states." A database associates entries corresponding to the items of an object (including the action(s) and the state(s)), and contains storage locations where the associated procedural instructions and/or data are to be found. The action can be independent of state information, or can instead be executed in a manner responsive to a sensed state. The controller may also include diagnostic capability, as well as accumulation and processing of performance data for subsequent analysis.