LG Electronics 120S user manual MV = Kp ⋅ Td dEdt

Chapter 7 Usage of Various Functions

⑤The D action when a constant deviation occurred is shown as Fig. 7.6

Fig. 7.6 Derivative action with a constant deviation

⑥The expression of D action is as following;

MV = Kp ⋅ Td dEdt

⑦Derivative action is used only in PID action in which P and I actions combine with D action.

(d)PID action

①PID action controls the control object with the manipulation quantity produced by (P+I+D) action

② PID action when a given deviation has occurred is shown as the following Fig. 7.7.

Fig. 7.7 PID action with a constant deviation

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