Safety
What is Watchdog Timer?
Definition
A hardware or software timer that resets the system if not periodically refreshed by the running program. Watchdog timers detect processor lockups in PLCs and controllers, triggering a safe shutdown or restart.
Related Terms
PLC (Programmable Logic Controller)
A ruggedized digital computer used to automate industrial processes by reading i...
CPU Module
The central processing unit of a PLC system that executes the control program, m...
Fail-Safe
A design principle ensuring that equipment defaults to a safe condition when a f...
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