Module identification method and system for path connectivity in modular systems

Abstract

A configurable self-identifying workpiece transport system is described for moving an associated workpiece relative to a plurality of associated workpiece functional units selectively performing operations on the associated workpiece. The transport system includes a plurality of transport modules and a control unit. The plurality of transport modules are disposed in selected positions relative to the associated workpiece functional units, and each of the plurality of transport modules stores identification data and functionality data specific to the transport module. The control unit includes an automatic identification system in communication with each of the plurality of transport modules for retrieving the identification data and the functionality data from each of the plurality of transport modules and generating an itinerary for moving the associated workpiece relative to the workpiece functional units. Each of the plurality of transport modules includes a local communication circuit adapted to selectively communicate with adjacent transport modules. In one embodiment, the control unit is distributed among the plurality of transport modules and in another embodiment, a global system bus is provided by a central control unit for communicating with each of the plurality of transport modules through the global bus. The local communication circuit includes photo optic devices and the global system bus uses a two wire interface.