Loading local progress…
PLC Gym

Two limits, not one

Getting the lesson ready…

One limit makes a pump flick on and off. Two limits, and a memory in between, keep it steady.

Two limits, not one: the words you will learn

a pump or valve flicking on and off because a reading hovers at its limit
short cycling (chatter)
one limit to switch on and a different one to switch off, with a memory in between
hysteresis