LS Industrial Systems GLOFA G7M-DR20U, Руководство пользователя

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Chapter 7. Usage of Various Functions
7-23
⑤
The D action when a constant deviation occurred is shown as Fig. 7.6
Fig. 7.6 Derivative action with a constant deviation
⑥
The expression of D action is as following;
dt
dE
Td Kp MV
× =
⑦
Derivative action is used only in PID action in which P and I actions combine with D action.
(d) PID action
①
PID 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
P
Manipulation quantity
in P action
Manipulation
quantity in P action
Td