Pid Control Adjustment; Summary Of Adjustment; Fundamental Adjustment (Common) - Toshiba TOSVERT VF-AS3 Instruction Manual

5

PID control adjustment

5. 1

Summary of adjustment

■ In case with the estimate of PID gain
Set the estimated value of PID gain and check the operation of the system.
Adjust the gain if necessary.
■ In case without the estimate of PID gain
1) First, operate the inverter by default setting gain and check the operation of the system.
2) Adjust the fundamental gain.
(1) Adjust the proportional (P) gain when the response is delayed.
(2) Adjust the integral (I) gain when the unstable condition continues.
(3) Adjust the differential (D) gain when the system always changes or continues unstable condition even
after PI gain adjustment.
3) Apply further adjustment for stability if necessary.
* Adjust the primary delay filter to stabilize for speed type PID control.
5. 2

Fundamental adjustment (common)

The fundamental gain of PID control adjusted according to the system.
Δx
Symbol Title
Kp F362
Ki F363
Kd F366
VF-AS3
PID control PID control
Hz
∫
y = KpΔx + Ki Δxdt + Kd
Parameter name
PID1 proportional gain
PID1 integral gain
PID1 differential gain
y
Hz
dΔx
dt
PID output frequency
F362=1.0: Kp =1.0
F363=1.0: Ki =1.0 (s
F366=1.0: Kd =1.0 (s)
5-1
Setting value
-1
)
5. PID control adjustment
I
II
III
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18