YASKAWA Varispeed V7 Instruction Manual page 176

Constant
No.
n140 Energy-saving Control
n158
* Depends on Inverter capacity.
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 the voltage limit using linear interpolation. The constants are
set in % for 200-V/400-V Inverters.
Constant No.
n141 Energy-saving Control Voltage
n142 Energy-saving Control Voltage
n159 Upper Voltage Limit For Energy-
n160 Upper Voltage Limit For Energy-
Voltage limit
250 V*
6 Hz
* Doubled for the 400 V Class Inverters.
Name
Coefficient K2
Motor Code
Name
Lower Limit at 60 Hz
Lower Limit at 6 Hz
saving Control at 60 Hz
saving Control at 6 Hz
Upper limit
Lower limit
7. Programming Features
Unit Setting Range
- 0.0 to 6550
- 0 to 70
Unit Setting Range
% 0 to 120
% 0 to 25
% 0 to 120
% 0 to 25
60 Hz
Output frequency
Factory
Setting
*
*
Factory
Setting
50
12
120
16
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