• This function is not intended for machines that require a constant acceleration/deceleration
time. The acceleration/deceleration time changes constantly based on the size of the load and
inertia.
• If the inertia of the machine is more than approximately 20 times that of the motor shaft, a trip
error may occur. In this case, deal with the trip error instead of using the automatic optimum
acceleration/deceleration function.
• The automatic optimum acceleration/deceleration setting is enabled in the V/f control mode
only. In other words, the inverter performs normal operation in other operation modes.
• When the automatic operation mode is selected, jogging operation will be carried out with
automatic acceleration enabled, which is different from normal jogging operation.
• Repeating the automatic optimum acceleration/deceleration function frequently may cause
overloading because the motor is accelerated/decelerated at 150% of the rated current of the
inverter.
• When the internal braking circuit or an external regenerative braking unit is used separately,
the motor cannot decelerate based on the internal DC voltage. In this case, do not use the
automatic optimum acceleration/deceleration function.
• When using a smaller motor in capacity than the inverter, set the Overload Limit Selection
(b021) to Enabled and the Overload Limit Level (b022) to 150% of the rated current of the
motor.
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