What is reset at the conclusion of each scan cycle by a processor when the scan time is less than the watchdog timer?

At the conclusion of each scan cycle, the processor resets the watchdog timer if the scan time is less than the watchdog timer duration. This reset indicates that the system is functioning correctly and responding within the expected time frame. If the scan cycle exceeds the watchdog timer, the timer will not be reset, potentially leading to a system fault or reset to safeguard against failures. This mechanism ensures system reliability and responsiveness.