Firmware ≤ 11.00 - DMS 8.0 EN - 10/2011 L 205
8400 StateLine C | Reference manual
Motor control (MCTRL)
Parameterisable additional functions
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
( 200)
– 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 C00019
=0.
Auto DCB function during operation with speed feedback
If you want to use the auto DCB function contrary to our recommendation (see above), the
auto DCB threshold must not fall below the following values depending on the number of
encoder increments (C00420
):
How to set the automatic DC-injection braking
1. Set a hold time in C00106
>0s.
• Automatic DC-injection braking is active for the time set.
• In case of operation without speed feedback, the braking current set in C00036
is injected.
• After the set hold time has expired, the controller sets a pulse inhibit.
2. Set the operating threshold in C00019
.
• The operating threshold can serve to set a dead band in the setpoint. If DC-
injection braking is not to be active then, C00106
must be set to a value of "0".
Stop!
If the DC-injection braking operation is too long and the braking current or
braking voltage is too high, the connected motor may overheat.
Number of encoder increments
C00420
Auto DCB threshold C00019
816
16 8
32 4
64 2
> 128 No restrictions
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