Autotuning PID capabilities in temperature controllers solve most problems if used properly, but they do not always work as desired. Sometimes, a good old-fashioned manual approach is the solution.
Proportional-integral-derivative control methods — more commonly known as PID control — have been used in industrial applications for as long as anybody can remember. Over the decades, control engineers have developed tuning techniques to get loops to behave as desired. Dozens — if not hundreds — of ways exist to determine the “magic settings” to get a loop to remain stable while quickly responding to process upsets and setpoint changes.