Firmware Manual

9000X AF Drives
MN04004001E
For more information visit: www.eaton.com
8-53
August 2010
Description of Parameters
Figure 8-43: DC-Braking Time when Stop Mode = Coasting
507 DC-braking current 234567 (P1.4.8)
Defines the current injected into the motor during DC-braking.
508 DC-braking time at stop 234567 (P1.4.9)
Determines if braking is ON or OFF and the braking time of the DC-brake when the
motor is stopping. The function of the DC-brake depends on the stop function, ID506.
0.0 DC-brake is not used
>0.0 DC-brake is in use and its function depends on the Stop function, (ID506).
The DC-braking time is determined with this parameter.
Par. ID506 = 0; Stop function = Coasting:
After the stop command, the motor coasts to a stop without control of the frequency
converter.
With DC-injection, the motor can be electrically stopped in the shortest possible time,
without using an optional external braking resistor.
The braking time is scaled according to the frequency when the DC-braking starts. If
the frequency is ≥ the nominal frequency of the motor, the set value of parameter
ID508 determines the braking time. When the frequency is ≤10% of the nominal, the
braking time is 10% of the set value of ID508.
t
f
out
Output Frequency
Motor Speed
DC-Braking ON
RUN
STOP
t = 1 x ID508
t
f
out
f
n
f
n
Output Frequency
Motor Speed
DC-Braking ON
RUN
STOP
t = 0.1 x ID508
0.1 x f
n