The TwinCAT 2 Base components consist of runtime systems for real-time execution of control programs and development environments for programming, configuration, and diagnostics:

• TwinCAT I/O: versatile I/O interface for all common fieldbuses
• TwinCAT PLC: enables programming of up to four PLC runtimes on a single PC. The PLC program can optionally be written in one or several IEC 61131-3 languages (IL, LD, FBD, SFC, ST) or CFC.
• TwinCAT NC: enables simultaneous positioning of many axes. The levels NC PTP (point-to-point positioning), NC I (linear and circular interpolating movements of axis groups with up to eight drives) and CNC (extension of NC I with conventional CNC features for up to 32 interpolating axes per channel) are available for this purpose.

With the supplement products, functions from the system, motion, communication, controller, and building automation areas can be added to individual TwinCAT 2 Base components.