What are the Local levels of DCS Code numbers?

The local levels of DCS (Dynamic Contour System) code numbers serve to categorize the types of checks and connections that can be performed within a system. The correct answer focuses on the necessary levels that represent specific functional areas in the DCS framework.

"Base" refers to the fundamental level of operation, while "Position/Speed Check" and "I/O Connect" are critical components that ensure the machine operates correctly by monitoring both the positional accuracy and the speed of the motion as well as managing the input/output connections that interface with other parts of the system. This three-tier classification is essential for effective operational control, ensuring that the machine functions safely and efficiently by confirming that each of these areas is functioning as intended.

In contrast to this choice, other options may present concepts or categories that do not directly align with the local levels recognized in DCS. Thus, the provided answer encapsulates the complete spectrum of checks and connections necessary for proper DCS operation.