Trial Operation Procedures
4-15
îš„Precautions After Using Autotuning
For a fixed output region, the V/f pattern for the maximum point in the output region must be set after com-
pleting autotuning. To increase the motor’s rated speed by 1 to 1.2 times or when using a fixed output motor,
make the following changes after autotuning. Do not change E1-06 (Base frequency) or E1-13 (Base voltage).
Increasing the Motor’s Rated Speed by 1 to 1.2 Times
To increase the motor’s rated speed by 1 to 1.2 times, use the following formula to change the setting of E1-04
(Maximum output frequency):
E1-04 = (Motor’s rated speed) × (No. of motor poles)/120 (Hz) × (1 to 1.2)
If the motor’s speed is increased beyond the rated speed, fixed output characteristics will be used at high
speeds and motor torque will be reduced.
Applications to Constant Output Motors Such as Motors for Machine Tools
Use the following formula to change the settings of E1-04 (Maximum output frequency) and E1-05 (Maxi-
mum frequency) when using a motor with a fixed output, e.g., a motor for a machine tool:
E1-04 = Frequency (Hz) at maximum speed under no-load conditions (load rate = 0)
E1-05 = Voltage (V) at maximum speed under no-load conditions (load rate = 0)
Do not change the E2 motor constants after performing autotuning.
îš„ Precautions for Precision Settings
Settings for autotuning are different when performing autotuning using motor test reports or design data. Use
the following table as reference.
Operator Display Simple Setting Precision Setting
T1-03 Motor rated voltage
Voltage under no-load con-
ditions at motor rated speed
T1-05 Motor base frequency
Frequency under no-load
conditions at rated speed
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