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PROGRAMMING
INSTRUCTIONS
SINUS PENTA
349/452
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.
– [
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.
– [
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 in stand-by, the RUN command must be disabled and enabled again to accelerate the
motor.