Which function does pressing the 'Start' button in play mode perform?

Pressing the 'Start' button in play mode is fundamentally designed to initiate the execution of a job or process. This action is crucial as it signals the system to begin performing the predefined tasks that have been set up during prior stages, such as when the tasks were programmed or simulated.

When the system is in play mode, it is expected to carry out operations based on the current configuration and inputs, and the 'Start' button serves as the trigger to transition from an idle or standby state to active execution. This aligns with standard operational procedures in many engineering and robotic systems, where activating a job requires a clear command given by the user through the interface.

While other options may seem relevant in certain contexts, they do not accurately reflect the primary function of the 'Start' button in play mode. For instance, regulating system power typically occurs before play mode is engaged, switching to teach mode would involve a different command unrelated to starting execution, and activating a safety check usually happens as a prerequisite or during system initialization rather than as a direct response to pressing the 'Start' button in play mode.