Promodul-U is a modular automation system for medium and high performance programmable logic controllers and numeric controllers (PLC & CNC). It can be extended up to 256 function modules and 4096 inputs/outputs. Up to four freely selected control units can be operated as a multi-processor system in the main rack. Up to 64 NC axes can then be controlled in 32 NC subsystems. The multitasking operating system guarantees flexible application of a wide range of programs and optimal utilization of computing capacity through free cycle definition. There is a wide range of modules for configuring the automation system appropriately for the task.