Actual signals and parameters
82
21.04 DC HOLD Activates/deactivates the DC hold function.
When both the reference and the speed drop below 21.05, DC HOLD
SPEED the drive will stop generating sinusoidal current and start to
inject DC into the motor. The current is set by 21.06 DC HOLD CURR.
When the reference speed exceeds 21.05, normal drive operation
continues.
Note: DC Hold has no effect if the start signal is switched off.
Note: Injecting DC current into the motor causes the motor to heat up.
In applications where long DC hold times are required, externally
ventilated motors should be used. If the DC hold period is long, the DC
hold cannot prevent the motor shaft from rotating if a constant load is
applied to the motor. See section DC Hold on page 33.
NO Function inactive. 0
YES Function active. 65535
21.05 DC HOLD SPEED Defines the DC Hold speed. See 21.04 DC HOLD.
0…3600 rpm Speed in rpm. 1 = 1 rpm
21.06 DC HOLD CURR Defines the DC hold current. See 21.04 DC HOLD.
0.0…100.0% Current in percent of the motor nominal current. 1 = 1%
21.09 E-STOP MODE The drive stopping method when an e-stop command has been
received.
STOP RAMPING The drive ramps to zero speed in the time set by 22.07 E-STOP RAMP
TIME. When the drive reaches zero speed it will turn off (remove
RUN).
1
STOP TORQ The drive decelerates to zero speed at torque limit. When the drive
reaches zero speed it will turn off (remove RUN).
2
COAST STOP The drive coasts to a stop (immediate removal of RUN). 3
No. Name/Value Description FbEq
DC HOLD SPEED
t
t
SPEEDmotor
Ref.
DC Hold
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