Mitsubishi Electric FR-F820-00046 Instruction Manual page 405

Fr-f800 series
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 PID action outline
 PI action
PI action is a combination of proportional action (P) and integral action (I), and applies a manipulated amount according to the
size of the deviation and transition or changes over time.
[Example of action when the measured value changes in a stepped manner]
Deviation Set point
Measured value
P action
I action
PI action
(Note) PI action is the result of P and I actions being added together.
 PD action
PD action is a combination of proportional action (P) and differential action (D), and applies a manipulated amount according
to the speed of the deviation to improve excessive characteristics.
[Example of action when the measured value changes proportionately]
Set point
Measured value
P action
D action
PD
action
(Note) PD action is the result of P and D actions being added together.
 PID action
PID action is a combination of PI and PD action, which enables control that incorporates the respective strengths of these
actions.
Set point
Measured value
P action
I action
D action
PID action
(Note) PID action is the result of all P, I and D actions being added together.
404
5. PARAMETERS
5.11 (A) Application parameters
Time
Time
Time
Deviation
Time
Time
Time
Deviation
Time
Time
Time
2
y = at
+ bt + c
Time

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