Question
Why does E5[]N Basic-type Digital Temperature Controllers overshoot or undershoot?
Answer
The proportional band is too narrow and the P constant is too small.
The integral time is too short and the I constant is too small.
The derivative time is too long and the D constant is too large.
It is in ON/OFF control mode.
The control cycle is too long for a control system with fast thermal response.
The overlap band setting is mistakenly set for a dead band setting in heating and cooling control.
Applicable models: E5CN, E5GN, E5EN, and E5AN