Could some expert please provide me with materials on PID tuning? I can’t set it to automatic here

Past experience: “General principles for PID tuning: a. Increase the proportional gain P when there is no oscillation in the output.” b. Reduce the integration time constant Ti when the output is not oscillating. c. Increase the differential time constant Td when the output is not oscillating. General steps: a. Determine the proportional gain P. To determine the proportional gain P, first eliminate the integral and derivative terms of the PID control system; generally, Ti is set to 0 and Td is set to 0 (see the parameters setting instructions for PID for details), thereby turning the PID system into a pure proportional control system. Set the input to 60%–70% of the maximum value allowed by the system, and gradually increase the proportional gain P from 0 until oscillations occur in the system ； Conversely, as the proportional gain P at this point gradually decreases until the system stops oscillating, record the value of P at that time, and set the proportional gain P in the PID controller to 60%–70% of this value. Proportional gain P tuning is complete. b. Determining the integral time constant Ti: After the proportional gain P is determined, an initial value for the integral time constant Ti that is relatively large is set; then Ti is gradually reduced until oscillations occur in the system. Afterwards, Ti is gradually increased again until the oscillations cease. Record the Ti value at this moment, and set the integral time constant Ti of the PID to 150%~180% of the current value. The integration time constant Ti has been adjusted. c. Determine the integration time constant Td. The integration time constant Td generally does not need to be set; a value of 0 is sufficient. To set it, use the same method as determining P and Ti, taking 30% of the value without oscillation. ”