Delta AS Series Manual page 232

A S S er i es Mo d u le Ma n ua l
α、β Value
To reduce overshoot, you can use parameters of ALPHA or BETA in the beginning of the PID
operation or while SV (target value) varies to compensate i
heating up or cooling down). See the images below. Use ALPHA parameter to reduce overshoot while the
temperature is climbing up. Use BETA parameter to reduce overshoot while the temperature is dropping.
Tem perature ( C)
Temperature ( C)
_7
7 - 3 6
0
0
nitial value of integral calculus (for
Tim e
Time