Page 265 - Electric Drives and Electromechanical Systems
P. 265

262   Electric Drives and Electromechanical Systems
































             FIG. 10.13 An overview of a manufacturing cell, showing how the various machine-tools can be linked, with the
             overall control undertaken by a PLC. The individual machine tools and robots are fitted with individual distrib-
             uted control systems (DSC) for the control of individual axes and the related process tasks.






























             FIG. 10.14 The internal structure of a PLC. The key feature being the insolation of the inputs and outputs from
             computing elements of the PLC, these are all powered from an external source. The programming interface
             shown is a small handheld programming keyboard, large PLCs can be programmed via a personal computer.
   260   261   262   263   264   265   266   267   268   269   270