4.16 Start Mode Setting
Select the start mode to use when the operation command is input with the motor in the
stopped condition.
Acceleration Start
Acceleration start is a general acceleration mode. If there are no extra settings applied, the
motor accelerates directly to the frequency reference when the command is input.
Start After DC Braking
This start mode supplies a DC voltage for a set amount of time to provide DC braking
before an inverter starts to accelerate a motor. If the motor continues to rotate due to its
inertia, DC braking will stop the motor, allowing the motor to accelerate from a stopped
condition. DC braking can also be used with a mechanical brake connected to a motor shaft
when a constant torque load is applied, if a constant torque is required after the the
mechanical brake is released.
The amount of DC braking required is based on the motor’s rated current. Do not use DC
braking resistance values that can cause current draw to exceed the rated current of the inverter.
If the DC braking resistance is too high or brake time is too long, the motor may overheat or be
damaged.