YASKAWA VS-606V7 Series Instruction Manual page 106

• Using Energy-saving Control Mode
Verify that the parameter n002 is set to 0 (V/f control mode) when performing
energy-saving control. Setting n139 to 1 enables the energy-saving control
function.
Energy-saving Control Selection (n139)
Parameters
No.
n139
Normally it is not necessary to change the setting. However, if the motor
characteristics are different from a Yaskawa standard motor, refer to the description
below and change the parameter setting accordingly.
• Energy-saving Control Mode (n140, n158)
Calculates the voltage for the best motor efficiency when operating in energy-
saving control mode. The calculated voltage becomes the output voltage reference.
The factory setting is set to the max. applicable motor capacity of a Yaskawa
standard motor.
The greater the energy-saving coefficient is, the greater the output voltage becomes.
When using a motor other than a Yaskawa standard motor, set the motor code
corresponding to the voltage and capacity to n158. Then, change the setting of the
energy-saving coefficient K2 (n140) by 5% so that the output power becomes the
smallest.
When the motor code is set to n158, the energy-saving coefficient K2, which
corresponds to the motor code, is set n140.
Parameter
No.
n140
n158
∗
Setting depends on inverter capacity.
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Name Unit
Energy-saving 0: Disabled
-
control selection
Name Unit
Energy-saving
- 0.0 to 6550
control coefficient K2
Motor Code -
Setting Initial
Range Setting
0
1: Enabled
Setting Initial
Range Setting
*
0 to 70 *
105