What is the function of a PLC’s watchdog timer?
A. To keep track of the time
B. To schedule tasks
C. To trigger events
D. To monitor the PLC’s operation and reset the PLC in case of a malfunction
Answer:D
What is the function of a PLC’s watchdog timer?
A. To keep track of the time B. To schedule tasks C. To trigger events D. To monitor the PLC’s operation and reset the PLC in case of a malfunction
Explanation: A PLC’s watchdog timer is a safety feature that monitors the PLC’s operation and resets the PLC in case of a malfunction. It is a timer that is continuously reset by the PLC’s control program, and when it expires, it triggers a reset of the PLC. This ensures that the PLC is always in a known state and can recover from unexpected errors or malfunctions.