What is Proportional Integral Derivative (PID) Controller?
PID is a control loop feedback mechanism used in manufacturing equipment and industrial control systems where the primary focus is calculating the values setpoint parameters of the temperature controller; offering a more precise way of maintaining temperature.
The three functions of PID are defined below:
- P = Proportional
- Proportional control stabilizes the work load temperature and upon startup reduces temperature overshoot.
- I = Integral
- Resets “pushes” the actual temperature toward the setpoint temperature, until they are equal; this eliminates droop.
- There are two types of Integral; manual & automatic.
- D = Derivative (a prediction of future errors; based on the current rate of change)
- Also known as “Rate”, this function is to prevent or greatly reduce overshoot/undershoot a setpoint temperature.
What is Autotune PID?
When the Autotune function is initiated, it goes through two ON/OFF cycles then calculates the PID values and inserts them into memory for your thermal system. There is a 90+% accuracy with Autoune PID and in addition, the operator can also change the stored PID values to further improve temperature control.
EZ-ZONE® PM Primary Functions are available for the following options in it’s temperature controller.
- C = PID controller with universal input
- R = PID controller with universal input and profiling ramp/soak
- *B = PID controller with universal input and profiling ramp/soak and battery back-up with real time clock
- J = PID controller with thermistor input
- N = PID controller with thermistor input and profiling ramp/soak
- *E = PID controller with thermistor input and profiling ramp/soak and battery back-up with real time clock
- S = Custom firmware
*Options B & E are not available with 1/32 DIN (PM3) or 1/16 DIN (PM6) models.