12.2 b: APPLICATION
558 SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
Set b8-01 and the following parameters according to the control mode and the motor.
• Set parameters b8-04, b8-05, and b8-06 when using V/f Control or Closed Loop V/f Control.
• Set parameters b8-02, b8-03 when using vector control with an induction motor.
• Set parameters b8-16, b8-17 when using a PM motor.
Note:
• Energy-saving control is not appropriate for applications with sudden changes in the load, or applications driving heavy loads such as a
traverse car application.
• Energy-saving control maximizes operation based on precise motor data set to the drive. Be sure to perform Auto-Tuning and enter the
correct information about the motor before using the Energy-saving control.
■ b8-01 eSave Ctrl Selection
No.
(Hex.)
Name Description
Default
(Range)
b8-01
(01CC)
eSave Ctrl Selection
Sets the Energy-saving control function.
0
(Determined by A1-02)
0 : Disabled
1 : Enabled
2 : Search Enabled
■ b8-02 eSave Ctrl Gain
No.
(Hex.)
Name Description
Default
(Range)
b8-02
(01CD)
RUN
Expert
eSave Ctrl Gain
Sets the gain for Energy-saving control.
Determined by A1-02
(0.0 - 10.0)
Increase the setting value to increase energy saving. If the setting value is too large, the motor will stall.
■ 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, 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)
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