12.2 b: APPLICATION
484 SIEPCYEUOQ2V01A Q2V Technical Manual
■ b8-03: eSave Filter Time
No.
(Hex.)
Name Description
Default
(Range)
b8-03
(01CE)
RUN
Expert
eSave Filter Time
Sets the responsiveness for Energy-saving control.
Determined by A1-02, C6-
01 and o2-04
(0.00 - 10.00 s)
Decrease the setting value to increase responsiveness. If the setting value is too low, operation will not be stable.
■ b8-04: eSave Coef. Value
No.
(Hex.)
Name Description
Default
(Range)
b8-04
(01CF)
Expert
eSave Coef. Value
Sets the Energy-saving control coefficient to maintain maximum motor efficiency. The default
setting is for Yaskawa motors.
Determined by C6-01, E2-
11, and o2-04
(0.00 - 655.00)
When you use a motor from a different manufacturer, increase the setting value in 5% increments to find the
minimum value for U1-08 [Output Power] at light loads.
When you decrease the setting value, it decreases the output voltage and decreases power consumption. If the
setting value is too low, the motor will stall.
Note:
When you do Rotational Auto-Tuning, the drive will automatically set the energy-saving coefficient.
■ b8-05: Power Det.Filter Time
No.
(Hex.)
Name Description
Default
(Range)
b8-05
(01D0)
Expert
Power Det.Filter Time
Sets the time constant to measure output power.
20 ms
(0 - 2000 ms)
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.
(Hex.)
Name Description
Default
(Range)
b8-06
(01D1)
Expert
Srch Op.Volt Limit
Sets the voltage limit for Search Operation as a percentage of the motor rated voltage.
0%
(0 - 100%)
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.
(Hex.)
Name Description
Default
(Range)
b8-16
(01F8)
Expert
PM eSave Coef.Ki
Sets torque linearity. This parameter uses the Ki value from the motor nameplate. Usually it is not
necessary to change this setting.
1.00
(0.00 - 3.00)
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.
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