DVP-ES2-EX2-SS2-SA2-SX2-Operation Manual

3. Instruction Set
Example 2: Block diagram of application on AC motor drive (S 3 +4 = 0)
Speed instruction (S)
S+MV
AC motor
drive
Acceleration/deceleration
instruction (SV)
PID
Acceleration/deceleration
output (MV)
Actual acceleration/
deceleration speed
(PV = S - P)
Speed
detection
device (P)
Example 3: Block diagram of application on temperature control (S 3 +4 = 1)
Temperature instruction (SV)
PID
Heating (MV)
Heater
Actual temperature
(PV)
Temperature
detection
device
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 b
G()
s = (model of general motors), SV = 1, and sampling time (T S ) = 10ms. Suggested
s + a
steps for adjusting the parameters are as follows:
Step1:
Set K I
and K D
as 0, and K P
as 5, 10, 20, 40. Record the SV and PV respectively and the results are
as the figure below.
1.5
K P=40
K P=20
K P=10
SV=1
1
0.5
K =5 P
0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Time (sec)
3-249