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E6580757
F-25
6
Application!!
• A waiting time of 200 to 1,000msec is preset to allow the residual voltage in the motor to decrease
to a certain level during restart. For this reason, the start-up takes more time than usual.
• Use this function when operating a system with one motor connected to one inverter. This function
may not operate properly in a system configuration with multiple motors connected to one inverter.
Application to a crane or hoist
The crane or hoist may have its load moved downward during the above waiting time from input of
the operation starting command to the restart of the motor. To apply the inverter to such machines,
therefore, set the auto-restart control mode selection parameter to "0" (Disabled), and avoid using
the retry function. If retry function is enabled the load could move downward causing damage and
or injury.
6.12.2 Regenerative power ride-through control
: Regenerative power ride-through control
• Function
Regenerative power ride-through control continues the operation of the motor by utilizing motor re-
generative energy in the event of momentary power failure.
[Parameter setting]
Title Function Adjustment range Default setting
Regenerative power ride-through control 0: Disabled, 1: Enabled 0
Note: Even when this parameter is set, the particular load conditions may cause the motor to coast. In this
case, use the auto-restart function along with this parameter function.
[When power is interrupted]
★ The time for which the operation of the
motor can be continued depends on the
machine inertia and load conditions. Before
using this function, therefore, perform
verification tests.
★ Use with the retry function allows the motor
to be restarted automatically without being
brought to an abnormal stop.
★ The operation continuing time is about
100ms when regenerative power ride-
through control is enabled ( = 1).
Input voltage
Motor speed
Approx. 100ms
[If momentary power failure occurs]
Input voltage
Motor speed
100ms (maximum)