Lenze L-force HighLine C 8400 Series Reference Manual page 255

Function
For understanding the auto DCB function, it is necessary to distinguish between three
different types of operation:
A. The drive has been enabled and, in the course of operation, the speed setpoint falls
below the auto DCB threshold.
– In case of operation without speed feedback, a braking current (C00036) is injected.
After the auto DCB hold time (C00106) has expired, the motor is deenergised via the
auto DCB function, i.e. a controller inhibit (CINH) is set.
– In case of operation with speed feedback, the motor is deenergised via the auto DCB
function after the auto DCB hold time (C00106) has expired, i.e. a controller inhibit
(CINH) is set.
The braking current which can be parameterised in
during operation with speed feedback.
B. When the controller is enabled, the drive is at standstill (n = 0).
If the enabled drive is to start, the speed setpoint passed via the acceleration ramp
must exceed the auto DCB threshold (C00019). Below this threshold, the motor will not
be energised.
C. When the controller is enabled, the motor (still) rotates at a speed which is above the
auto DCB threshold. If the speed setpoint reached via the acceleration ramp exceeds
the auto DCB threshold (C00019), the motor will be energised and the following action
will take place:
– During operation without speed feedback, the drive is "caught".
Flying restart function
– During operation with speed feedback, the drive synchronises to the current actual
speed value.

Tip!
We recommend to deactivate the auto DCB function during operation with speed
feedback via a setting of
Firmware ≤ 11.00 - DMS 6.0 EN - 10/2011
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8400 HighLine C | Reference manual
Parameterisable additional functions
( 250)
C00019 = 0.
L
Motor control (MCTRL)
C00036 does not have any effect
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