Timer

Timers are devices used in PLC control systems to monitor and control time intervals. There are several types of timers that serve different functions: on-delay timers start timing after an input signal, off-delay timers continue timing for a set period after an input stops, pulse timers only time while an input is active, and extended timers keep timing even after an input stops until the set time is reached. Timers count fractions of seconds using the CPU clock and can control the on-time of outputs to automate processes that require timed operations like switching a motor on or off after a set delay.