Parameter Details
12
12.2 b: APPLICATION
SIEPCYEUOQ2V01A Q2V Technical Manual 485
■ b8-17: PM eSave Coef.Kt
No.
(Hex.)
Name Description
Default
(Range)
b8-17
(01F9)
Expert
PM eSave Coef.Kt
Sets torque linearity. This parameter uses the Kt value from the motor nameplate. Usually it is not
necessary to change this setting.
1.00
(0.00 - 3.00)
When E5-01 = 1xxx [PM Mot Code Selection = Yaskawa SSR1 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.
(Hex.)
Name Description
Default
(Range)
b8-18
(01FA)
Expert
eSave d-Axis Filter Time
Sets the d-axis current reference filter time constant.
0.100 s
(0.000 - 5.000 s)
■ b8-19: eSave Search Frequency
No.
(Hex.)
Name Description
Default
(Range)
b8-19
(0B40)
Expert
eSave Search Frequency
Sets the frequency of Energy-saving control search operations. Usually it is not necessary to
change this setting.
Determined by A1-02
(10 - 300 Hz)
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.
■ b8-20: PM eSave Width for Test
No.
(Hex.)
Name Description
Default
(Range)
b8-20
(0B41)
Expert
PM eSave Width for Test
Sets the amplitude of Energy-saving control search operations.
1.0 degrees
(0.1 - 5.0 degrees)
An increase in the value can make the operational efficiency better. However, if the load inertia is small, it may be
necessary to adjust the value to prevent machine vibration.
Note:
• If low inertia causes vibration in the machine, decrease the setting value in 1.0-degree increments and check the response.
• To make the motor more efficient, increase the setting value in 1.0-degreee increments until the point immediately before machine
vibration starts to occur.
■ b8-21: PM eSave Gain for Test
No.
(Hex.)
Name Description
Default
(Range)
b8-21
(0B42)
Expert
PM eSave Gain for Test
Sets the gain of Energy-saving control search operations.
0.3Hz
(0.1 - 20.0 Hz)
When you decrease the value of C5-01 [ASR PGain 1], also decrease the value of b8-21 to keep the correct ratio.
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