Individual Functions
6-
117
Energy-saving
To perform energy saving, set b8-01 (Energy Saving Mode Selection) to 1. Energy-saving control can be per-
formed using both V/f control and vector control. The constants to be adjusted are different for each. In V/f
control, adjust b8-04 to b8-06, and in vector control, adjust b8-02 and b8-03.
Related Constants
* 1. The factory setting is 1.0 when using flux vector control.
* 2. The factory setting is 2.00 s when Inverter capacity is 55 kW min.
The factory setting will change when the control method is changed. The open-loop vector factory setting is given.
* 3. By setting E2-11 (Motor rated output) the appropriate value will be set.
* 4. The factory setting depends on the Inverter capacity. The value for a 200 V Class Inverter of 0.4 kW is given.
Con-
stant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO
BUS
Regis-
ter
V/f
V/f
with
PG
Open
Loop
Vec-
tor
Flux
Vec-
tor
b8-01
Energy-sav-
ing mode
selection
Select whether to enable or dis-
able energy-saving control.
0: Disable
1: Enable
0 or 1
0
No
A
A
A
A
1CCH
b8-02
Energy-sav-
ing gain
Set the energy-saving gain with
the vector control method.
0.0 to
10.0
0.7
*1
Yes
No
No
A
A
1CDH
b8-03
Energy-sav-
ing filter time
constant
Set the energy-saving filter time
constant with the vector control
method.
0.00 to
10.00
0.50 s
*2
Yes
No
No
A
A
1CEH
b8-04
Energy-sav-
ing coeffi-
cient
Set the maximum motor effi-
ciency 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
288.20
*3
*4
No
A
A
No
No
1CFH
b8-05
Power detec-
tion filter
time constant
Set the time constant for output
power detection.
0 to
2000
20 ms
No
A
A
No
No
1D0H
b8-06
Search opera-
tion 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 opera-
tion. 100% is the motor base
voltage.
0 to 100
0%
No
A
A
No
No
1D1H
E2-02
Motor rated
slip
Sets the motor rated slip in Hz
units.
These set values will become the
reference values for slip com-
pensation.
This constant is automatically
set during autotuning.
0.00 to
20.00
2.90 Hz
*4
No
A
A
A
A
30FH
E2-11
Motor rated
output
Set the rated output of the motor
in units of 0.01 kW.
This constant is automatically
set during autotuning.
0.00 to
650.00
0.40 kW
*4
No
Q
Q
Q
Q
318H
