Pid Output Gain: B5-10 (For Spec: F); Reverse Pid Output: B5-11 (For Spec: F); Adjusting Pid Control; Making Fine Adjustments - YASKAWA VARISPEED-616G5 Instruction Manual

PID Output Gain: b5-10 (for SPEC: F)

J
User User
Name
Constant
Number
b5-10 PID output gain
Constant b5-10 adjusts the PID control gain.
D

Reverse PID Output: b5-11 (for SPEC: F)

J
User User
Constant Name
Number
Reverse PID output
b5-11
selection
Settings
D
Setting
0
Executes 0 limit if PID output is negative (does not reverse).
1
Reverse rotation if PID output is negative.
The rotation will not reverse if reverse is prohibited by b1-04.
D

Adjusting PID Control

Use the following procedure to activate PID control and then adjust it while monitoring the response.
1. Enable PID control (set b5-01 to 2 or 1).
2. Increase the proportional gain P in b5-02 as far as possible without creating oscillation.
3. Reduce the integral time I in b5-03 as far as possible without creating oscillation.
4. Increase the differential time (D) in b5-05 as far as possible without creating oscillation.

Making Fine Adjustments

First set the individual PID control constants, and then make fine adjustments.
Reducing Overshooting
D
If overshooting occurs, shorten the derivative time (D) and lengthen the integral time (I).
Response
Rapidly Stabilizing Control Status
D
To rapidly stabilize the control conditions even when overshooting occurs, shorten the integral time
(I) and lengthen the derivative time (D).
Response
Reducing Long-cycle Oscillation
D
If oscillation occurs with a longer cycle than the integral time (I) setting, it means that integral opera-
tion is strong. The oscillation will be reduced as the integral time (I) is lengthened.
Change g
during during Setting Setting Unit Factory
Opera- Range
tion
Mul
0.0 to 25.0
×
tiple
Change g
during during Setting Setting Unit Factory
Opera- Range
tion
0, 1 −
×
Function
Before adjustment
After adjustment
Time
After adjustment
Before adjustment
Time
7 - 51
7.5 Common Functions
Valid Access Levels
Factory
Open
V/f V/f with
Setting
Loop
Control PG
Vector
1.0 A A A
Valid Access Levels
Factory
Open
V/f V/f with
Setting
Loop
Control PG
Vector
A A A
0
Flux
Vector
A
Flux
Vector
A
7