Delta DVP-ES2/EX2/SS2/SA2/SX2/SE manual =40 SV=1 KP =20 KP =10 KP =5

3. Instruction Set

Example 2: Block diagram of application on AC motor drive (S3+4 = 0)

Speed instruction (S) S+MV

Acceleration/deceleration output (MV)

Acceleration/deceleration	PID
instruction (SV)

Actual acceleration/ deceleration speed (PV = S - P)

AC motor

drive

Speed

detection device (P)

Example 3: Block diagram of application on temperature control (S3+4 = 1)

Temperature instruction (SV)		Heating (MV)
	PID		Heater

	Temperature
	detection
Actual temperature
	device
(PV)

Example 4: PID parameters adjustment

Assume that the transfer function of the controlled device G(S) in a control system is a first-order

function G(s) =	b	(model of general motors), SV = 1, and sampling time (TS) = 10ms. Suggested
	s + a

steps for adjusting the parameters are as follows:

Step1:

Set KI and KD as 0, and KP as 5, 10, 20, 40. Record the SV and PV respectively and the results are as the figure below.

1.5

KP =40 SV=1

KP =20 KP =10

1

KP =5

0.5

00 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Time (sec)

3 - 2 4 9