Omron RX Series User Manual page 289

3 The auto-tuning result will be displayed as follows.
Normal
end
If auto-tuning is aborted by an error, retry it.
To clear the above display, press the STOP/RESET key.
Precautions for Correct Use Precautions for Correct Use
• Even if you set H001 to 01 (Auto-tuning without motor rotation), the motor may rotate slightly.
• To perform auto-tuning for a motor one size smaller in capacity than the inverter, enable the
overload limit function and set the overload limit level to 150% of the rated current of the motor.
• If the Overvoltage Suppression Integral Time During Deceleration (b134) is set too small, an
Overvoltage trip (E07) may occur during auto-tuning. In this case, increase the b134 value and
retry auto-tuning.
• Make sure the following points before starting auto-tuning with motor rotation enabled.
There is no problem even if the motor accelerates up to approximately 80% of the base frequency.
The motor is not driven by external equipment.
The brake is released.
During auto-tuning, the inverter does not provide full output torque, which could result in a slip-and-fall
accident in elevating or other applications. To prevent this, remove the motor from the load and
perform the auto-tuning with the single motor. In this case, because the moment of inertia J is given for
the single motor, calculate the motor-shaft conversion of the moment of inertia of the load machine
and add it to this value.
In applications such as an elevator or ball screw where the amount of motor shaft rotation is limited,
the motor may rotate over the allowable rotation amount, which may result in a mechanical damage.
Be sure to set H001 to 01 (Enabled: No motor rotation).
If the Motor Parameter Io (No-load current) value is unknown, measure in advance the no-load current
value at 50 Hz under V/f control and set it in H033/H233 before auto-tuning.
4
Operations after auto-tuning
• After normal completion of auto-tuning, set the 1st Motor Parameter selection (H002) to 01
(Auto-tuning).
This enables the 1st motor parameters (H030 to H034) set by the auto-tuning function.
• At the end of auto-tuning, the inverter automatically resets the Auto-tuning Selection (H001) to
00 (Disabled).
To retry auto-tuning, set H001 again to enable auto-tuning.
• During auto-tuning without motor rotation, the Motor Parameter Io (No-load current) and
Motor Parameter J (Moment of inertia J) values are not measured. Set the following
parameters at the end of auto-tuning.
1st Motor Parameter Io (H033): Measure and set the no-load current of the single motor at
1st Motor Parameter J (H034):
High-function General-purpose Inverter 3G3RX-V1 User's Manual (I578-E1)
Abnormal
end
50 Hz in advance.
Alternatively, check the no-load current of the motor at 50
Hz with the motor manufacturer and set it.
Calculate and set the motor-shaft conversion of the
moment of inertia of the load machine.
6 Vector Control
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