Omron VARISPEED F7 User Manual page 95

Precautions for Rotating and Non-rotating Autotuning
If the motor rated voltage is higher than the power supply voltage, lower the base voltage value like shown
•
in Fig 4.3
autotuning.
1. Input the voltage of the input power supply to T1-03 (Motor rated voltage).
2. Input the results of the following formula to T1-05 (Motor base frequency):
3. Perform autotuning.
After the completing autotuning, set E1-04 (Max. output frequency) to the base frequency from the motor's
nameplate.
Rated voltage
from motor
name plate
4
When speed precision is required at high speeds (i.e., 90% of the rated speed or higher), set T1-03 (Motor
•
rated voltage) to the input power supply voltage × 0.9. In this case at high speeds the output current will
increase as the input power supply voltage is reduced. Be sure to provide sufficient margin in the Inverter
current.
Precautions after Rotating and Non-rotating Autotuning
If the maximum output frequency and base frequency are different, set the maximum output frequency
(E1-04) after autotuning.
10
4-
to prevent saturation of the Inverter's output voltage. Use the following procedure to perform
T1-05 Base frequency from motor nameplate
=
Output voltage
T1-03
0
Base frequency from
motor name plate
Rated voltage from motor
name plate
Fig 4.3 Motor Base Frequency and Inverter Input Voltage Setting
T1-03
---------------------------------------------- -
×
Motor rated voltage
Output frequency
Base frequency
x T1-03
from motor name
plate