Question

What is watchdog timer in PLC?

Answer 1

As the name implies, a watchdog timer essentially ensures the embedded system does not perpetually remain in state of software or hardware fault. ... On the other hand, a standard hardware timer is typically employed to accomplish a myriad of other system tasks.Jun 16, 2015');})();(function(){window.jsl.dh('9','

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LPC2148 has an inbuilt watchdog timer. The watchdog when enabled generates a system reset if the user program fails to feed (or reload) the watchdog within a predetermined amount of time. The watchdog consists of a fixed divide by 4 prescalar and a 32-bit counter. The clock is fed to the timer through the prescalar.