YASKAWA CIMR-ZU A Series Programming Manual page 50

1 2 b Application
Settin 1 e erse Enabled
Negative PI output will cause the drive to run in the opposite direction.
Fine unin PI
Follow the directions below to fine tune PI control parameters:
Goal
Suppress overshoot
Achieve stability quickly while
allowing some overshoot
Suppress long cycle oscillations
(longer than the integral time setting)
Suppress short cycle oscillations
b8 Ener y Sa in
The Energy Saving feature improves overall system operating efficiency by operating the motor at its most efficient level.
1. Energy Saving is not designed for applications that experience instantaneous heavy loads or applications that rarely operate with light
Note:
load conditions.
2. Energy Saving is mainly designed for applications with variable torque, however Energy Saving is not appropriate for applications where
the load may suddenly increase.
3. The performance of the Energy Saving function depends on the accuracy of the motor data. Always perform Auto-Tuning and correctly
enter the motor data before using this function.
b8 1 Ener y Sa in Control Selection
Enables or disables the Energy Saving function.
Enabling the Energy Saving function when using a PM motor may adversely affect motor efficiency depending on the type of PM motor.
Note:
Disable the Energy Saving function in such cases.
able 1 11 PI Fine unin
unin Procedure
Increase the integral time (b5-03)
Decrease the integral time (b5-03)
Increase the integral time (b5-03)
If oscillations are a problem, reduce the
proportional gain (b5-02) or increase the PI
primary delay time (b5-08)
esult
Response
Response
Response
Response
Before adjustment
After adjustment
Time
After adjustment
Before adjustment
Time
Before adjustment
After adjustment
Time
Before adjustment
After adjustment
Time