6
-72
Energy-saving
To perform energy saving, set b8-01 (Energy Saving Mode Selection) to 1.
Related parameters
* 1. The same capacity as the Inverter will be set by initializing the parameters.
* 2. The factory settings depend on the Inverter capacity.
Adjusting Energy-saving Control
By the Energy Saving function the voltage for optimum motor efficiency is calculated and becomes the output
voltage reference.
•
b8-04 (Energy-saving Coefficient) is set at the factory for motor use applied to the Inverter. If the motor
capacity differs from the motor applied to the Inverter, set the motor capacity in E2-11 (Motor Rated Out-
put). Also, adjust b8-04 in steps of 5 until reaches it’s minimum. The larger the energy-saving coefficient,
the greater the output voltage.
•
To improve response when the load fluctuates, reduce the power detection filter time parameter b8-05. If
b8-05 is set too small. However, motor rotations, when the load is light, may become unstable.
•
Motor efficiency varies due to temperature fluctuations and differences in motor characteristics. Conse-
quently the motor efficiency has to be controlled. To have optimized efficiency, the search operation is
used by varieting voltage. Parameter b8-06 (Search Operation Voltage Limiter) controls the range that
control the voltage using the search operation. For 200 V Class Inverters, set the range to 100%/200 V and
for 400 V Class Inverters, set the range to 100%/400 V. Set to 0 to disable the search operation.
param-
eter
Number
Name
Details
Setting
Range
Factory
Setting
Change
During
Opera-
tion
Access
Level
LCD Display
b8-01
Energy-saving mode selec-
tion
Select whether to enable or disable energy-saving control.
0: Disable
1: Enable
0 or 1
0
No
A
Energy Save Sel
b8-04
Energy-saving coefficient
Set the maximum motor efficiency value.
Set the motor rated capacity in E2-11 and adjust the value by
5% at a time until output power reaches a minimum value.
0.0 to
655.00
*1
*2
No
A
Energy Save COEF
b8-05
Power detection filter time
parameter
Set the time parameter for output power detection.
0 to 2000
20 ms
No
A
kW Filter Time
b8-06
Search operation voltage
limiter
Set the limit value of the voltage control range during search
operation.
Perform search operation to optimize operations using minute
variations in voltage using energy-saving control. Set to 0 to
disable the search operation. 100% is the motor base voltage.
0 to 100
0%
No
A
Search V Limit
