Yaskawa AC Drive Z1000 AC Drive HVAC Fan - Manual (Page 49)

Setting 1: Reverse Enabled
Negative PI output will cause the drive to run in the opposite direction.
n Fine-Tuning PI
Follow the directions below to fine tune PI control parameters:
Table 1.11 PI Fine Tuning
Goal Tuning Procedure Result
Suppress overshoot Increase the integral time (b5-03)
Response Before adjustment
After adjustment
Time
Achieve stability quickly while
allowing some overshoot
Decrease the integral time (b5-03)
Response
Before adjustment
After adjustment
Time
Suppress long cycle oscillations
(longer than the integral time setting) Increase the integral time (b5-03)
Response
Before adjustment
After adjustment
Time
Suppress short cycle oscillations
If oscillations are a problem, reduce the
proportional gain (b5-02) or increase the PI
primary delay time (b5-08)
Response
Before adjustment
After adjustment
Time
u b8: Energy Saving
The Energy Saving feature improves overall system operating efficiency by operating the motor at its most efficient level.
Note: 1. Energy Saving is not designed for applications that experience instantaneous heavy loads or applications that rarely operate with light
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.
n b8-01: Energy Saving Control Selection
Enables or disables the Energy Saving function.
No. Parameter Name Setting Range Default
b8-01 Energy Saving Control Selection 0, 1
Determined by
A1-02
1.2 b: Application
YASKAWA ELECTRIC SIEP YAIZ1U 03A YASKAWA AC Drive – Z1000 Programming Manual 49
1
Parameter Details