Lenze EVF9383 - Manual (Page 128)

Configuration
2−120
l
EDSVF9383V−EXT EN 2.0
Function
The drive controller gains the required energy from the rotational energy of the driven machine. The
driven machine is braked through the power loss of the controller and the motor. The speed
deceleration ramp is thus shorter than for an uncontrolled system (coasting drive).
After activation:
l The DC−bus voltage is controlled to the value at the input MFAIL−DC−SET.
l At the output MFAIL−N−OUT, an internally generated speed setpoint is output. The drive can
thus be braked to zero speed (via the speed setpoint).
– The start value for the controlled deceleration is the value at the input MFAIL−SET. This input
is usually connected to the output MCTRL−NACT (actual speed) or MCTRL−NSET2,
MFAIL−NOUT (set speed).
– The speed deceleration ramp (and thus the brake torque) results from the moment of inertia
of the driven machine(s), the power loss of the drive (group), and the parameter settings.
Stop!
l If a connected brake unit is activated, the drive is braked with the maximum possible torque
(I
max
). In this case, it may be necessary to adapt the parameterisation (see description of
parameter setting).
l If the power stage is not supplied, the drive cannot generate a standstill torque (important for
active loads such as hoists).