
126
Energy-saving Voltage Lower/Upper Limits (n141, n142,
n159, n160)
Set the upper and lower limits of the output voltage. When the value
calculated in the energy-saving control mode is larger than the upper
limit (or smaller than the lower limit), the limit value is output as the
voltage reference. The upper limit is set to prevent over-excitation, and
the lower limit is set to prevent stalls when the load is light. The voltage
limit is set for machines using 6 or 60 Hz. For any value other than 6 or
60 Hz, set th
e voltage limit using linear interpolation. The constants are set
in % for 200-V/400-V Inverters.
* Doubled for the 400 V Class Inverters.
Energy-saving Search Operation
In energy-saving control mode, the maximum applicable voltage is cal-
culated using the output power. However, a temperature change or the
use of another manufacturer’s motor will change the fixed constants,
and the maximum applicable voltage may not be emitted. In the search
operation, change the voltage slightly so that the maximum applicable
voltage can be obtained.
Constant
No.
Name
Unit
Setting
Range
Factory
Setting
n141
Lower Voltage Limit Energy-
saving Control at 60 Hz
1%
0 to 120
50
n142
Lower Voltage Limit Energy-
saving Control at 6 Hz
1%
0 to 25
12
n159
Upper Voltage Limit for Energy-
saving Control at 60 Hz
1%
0 to 120
120
n160
Upper Voltage Limit for Energy-
saving Control at 6 Hz
1%
0 to 25
16
Voltage Limit
Upper Limit
Lower Limit
Output Frequency
250 V*
6 Hz
60 Hz