What is the role of the internal coil in a continuous-cycle program?

The internal coil in a continuous-cycle program serves a vital function in managing the flow of the sequence. Specifically, it is responsible for starting and stopping the various operations within the program. The internal coil acts as a control mechanism that can be energized or de-energized based on the program's logic, thereby initiating a sequence of operations or halting them when required.

This functionality is essential in a continuous-cycle program, as it allows for dynamic control over the process, enabling the system to respond to different conditions, inputs, or predefined logic. When the internal coil is energized, it can trigger outputs and consecutive steps in a sequence, whereas de-energizing it may halt those actions, thereby ensuring the program runs efficiently and correctly according to its designed intent.

In contrast, while external sensors are related to monitoring conditions and feedback in a system, providing power is handled by other components, and storing the state of the program typically relies on memory elements rather than internal coils. Thus, the role of the internal coil is specifically tied to initiating and terminating sequences, which reinforces its importance in the continuous cycle operation of programmable controllers.