With Power Cycle, you execute a power cycle (power off/ power on) for the simulated PLC (and the simulator). This corresponds to a warm start of the PLC (the connection between Control Expert and simulator is broken and the current project variables remain).
A power cycle corresponds to the reset button of a Premium power supply or the unplugging and plugging in of a power supply.
You can execute a power cycle with
NOTE: In case of a safety PLC, power cycle simulates a cold start. Project variables are reset.