PROGRAMMING GUIDE
SINUS PENTA
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The figure above illustrates the patterns of the motor speed and the DC bus voltage in case of mains loss. In the
example above, power supply is restored before the drive turns off and before the deceleration ramp is over, so the
motor accelerates with the preset acceleration ramp.
If power supply is restored during the deceleration ramp in Power Down, the connected motor accelerates following the
selected acceleration ramp. A speed value for the end of Power Down can be set in C235; the desired operating mode
at stop can be set in C234.
When the motor speed attains the end level of Power Down, the following functions can be selected in parameter C234:
– [Stop]: The drive will control the motor until it stops down, independently of the value set in C235.
When the motor stops and power supply is restored, the RUN command must be disabled and enabled again to
accelerate the motor. Warning W28 OPEN START is displayed.
– [DCB]: When the speed of the Power Down end set in C235 is attained, DC braking occurs.
If power supply is restored during DC braking, the RUN command must be disabled and enabled again to accelerate the
motor. Warning W28 OPEN START is displayed.
– [Stand–By]: When the speed of the Power Down end set in C235 is attained, the drive is in stand–by.
If power supply is restored when the drive is on stand-by, the RUN command must be disabled and enabled again to
accelerate the motor. Warning W28 OPEN START is displayed.
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