Count things as they arrive
Getting the lesson ready…
A counter adds 1 on each rising edge, turns its done bit ON at its preset, and resets on purpose.
Count things as they arrive: the words you will learn
- a part inside the PLC that adds 1 each time something happens
- counter
- a counter that counts up, 1 at a time
- CTU
- the moment a signal changes from OFF to ON
- rising edge
- the count it must reach
- preset (PV, PRE)
- puts the count back to 0
- reset (R, RES)