Mitsumi electronic 55K, FR-F520-0.75K instruction manual PID action overview

PARAMETERS

(2) PID action overview

1)PI action

A combination of proportional control action (P) and integral control action (I) for providing a manipulated variable in response to deviation and changes with time.

[Operation example for stepped changes of process value]

Note: PI action is the sum of P and I actions.

Deviation Set point

Process value

P action

Time

I action

Time

PI action

Time

2)PD action

A combination of proportional control action (P) and differential control action (D) for providing a manipulated variable in response to deviation speed to improve the transient characteristic.

[Operation example for proportional changes of process value]

Note: PD action is the sum of P and D actions.

Set point

Deviation

	Process
P action	value
		Time
D action		Time

PD action

Time

3)PID action

The PI action and PD action are combined to utilize the advantages of both actions for control.

Note: The PID action is the sum of the P, I and D actions.		Set point
			Deviation
	Process			4
P action	value		Time
I action
			Time
D action
			Time
			y=at2+bt+c
PID action			Time

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