FREE WEB TOOL
HVAC PI/PID calculator
Calculate starting PI/PID settings using SIMC PI or Ziegler–Nichols methods. Intended for commissioning and initial checks, not automatic tuning.
SIMC PI – FOPDT
For a first-order-plus-dead-time approximation G(s)=k/(τs+1)·e^(-θs).
Ziegler–Nichols – Ku/Pu
Use only if the ultimate gain Ku and sustained-oscillation period Pu have already been determined safely.