Decrease the setting value to increase responsiveness to load changes. If you set the value too low during
operation at light loads, motor speed is not stable.
■
b8-06 Srch Op.Volt Limit
No.
Name
(Hex.)
b8-06
Srch Op.Volt Limit
(01D1)
Expert
The Search Operation changes the output voltage in small increments to find a setpoint at which the drive can use
minimum power to operate.
Set this parameter to 0 to disable Search Operation. This will not disable Energy-saving control.
If the setting value is too low, the motor will stall when loads suddenly increase.
■
b8-16 PM eSave Coef.Ki
No.
Name
(Hex.)
b8-16
PM eSave Coef.Ki
(01F8)
Expert
When b8-16 = 1.00 (default), the drive will automatically calculate and control the energy-saving coefficient. If
the motor nameplate has a description for "Ki", set this parameter to the Ki value.
Do this procedure to prevent oscillation when you set b8-01 = 1 [eSave Ctrl Selection = Enabled].
1. Check U5-21 [Energy Save Ki Coeff] and make sure that it aligns with the Ki value on the motor nameplate.
2. If the numbers are different, set b8-16 to the Ki value on the motor nameplate.
■
b8-17 PM eSave Coef.Kt
No.
Name
(Hex.)
b8-17
PM eSave Coef.Kt
(01F9)
Expert
When E5-01 = 1xxx, 2xxx [PM Mot Code Selection = Yaskawa SSR1 or SST4 series IPM motor], the drive
automatically calculates the energy-saving coefficient Kt and uses that value to control operation.
Do this procedure to prevent oscillation when you set b8-01 = 1 [eSave Ctrl Selection = Enabled].
1. Check U5-22 [Energy Save Kt Coeff] and make sure that it aligns with the Kt value on the motor nameplate.
2. If the numbers are different, set b8-17 to the Kt value on the motor nameplate.
■
b8-18 eSave d-Axis Filter Time
No.
Name
(Hex.)
b8-18
eSave d-Axis Filter Time
(01FA)
Expert
■
b8-19 eSave Search Frequency
No.
Name
(Hex.)
b8-19
eSave Search Frequency
(0B40)
Expert
Note:
• If low inertia causes vibration in the machine, increase the setting value in 10 Hz increments and check the response. If A1-02 = 8
[Control Method = EZ Vector], increase the setting value in 1 Hz increments.
• To make the motor more efficient, decrease the setting value in 1 Hz increments until the point immediately before machine vibration
starts to occur.
SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
V/f
CL-V/f
OLV
CLV
AOLV
Sets the voltage limit for Search Operation as a percentage where motor rated voltage is a setting
value of 100%.
V/f
CL-V/f
OLV
CLV
AOLV
Sets torque linearity. This parameter uses the Ki value from the motor nameplate. Usually it is not
necessary to change this setting.
V/f
CL-V/f
OLV
CLV
AOLV
Sets torque linearity. This parameter uses the Kt value from the motor nameplate. Usually it is not
necessary to change this setting.
V/f
CL-V/f
OLV
CLV
AOLV
Sets the d-axis current reference filter time constant.
V/f
CL-V/f
OLV
CLV
AOLV
Sets the frequency of Energy-saving control search operations. Usually it is not necessary to
change this setting.
Description
OLV/PM AOLV/PM CLV/PM EZOLV
OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV
OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV
OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV
OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV
OLV/PM
12.2 b: APPLICATION
Default
(Range)
0%
(0 - 100%)
Default
(Range)
1.00
(0.00 - 3.00)
Default
(Range)
1.00
(0.00 - 3.00)
Default
(Range)
100 ms
(0 - 5,000 ms)
Default
(Range)
Determined by A1-02
(20 - 300 Hz)
559
12