Count the seconds
Getting the lesson ready…
A timer counts time like a kitchen timer: set it, it counts, its done bit turns TRUE.
Count the seconds: the words you will learn
- a part inside the PLC that counts time, like a kitchen timer
- timer
- how long it waits
- preset (PT, PRE)
- turns ON when the time is up
- done bit (Q, DN)
- the time so far
- elapsed time (ET, ACC)