If you're unable to find a digital copy, you can try purchasing or borrowing a physical copy of the book from:
Industrial Robotics: Technology, Programming, and Applications industrial robotics mikell p groover pdf
The current buzzword. Groover called it "Computer Integrated Manufacturing" (CIM). The PDF explains how robots are just nodes on a network (RS-232 then, Ethernet now). If you are setting up a robot to receive data from an MES (Manufacturing Execution System), you are implementing Groover’s vision of hierarchical control. If you're unable to find a digital copy,
Groover’s work is noted for its high-speed scannability and educational aids, such as example problems and end-of-chapter exercises. Foundational Knowledge industrial robotics mikell p groover pdf