NXS Form 63-2600, Users Manual, Technical Data - CONTROL ...

170 Description of Parameters Honeywell
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 parameter ID508.
fout
fout
fn
Output frequency
Motor speed
fn
DC-braking ON
0,1 x fn
Output frequency
Motor speed
t = 1 x Par. ID508
t
DC-braking ON
t = 0,1 x Par. ID508
t
RUN
RUN
STOP
STOP
Figure 8-43. DC-braking time when Stop mode = Coasting.
NX12K21
Par. ID506 = 1; Stop function = Ramp:
After the Stop command, the speed of
the motor is reduced according to the
set deceleration parameters, as fast as
possible, to the speed defined with
parameter ID515, where the DCbraking
starts.
fout
Motor speed
Output frequency
The braking time is defined with
parameter ID508. If high inertia exists,
it is recommended to use an external
braking resistor for faster deceleration.
See Figure 8-44.
par. ID515
DC-braking
t = Par. ID508
t
RUN
STOP
NX12K23
Figure 8-44. DC-braking time when Stop mode =
Ramp
Automation and Control Solutions
Honeywell
Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MIN 55422 Scarborough, Ontario 63-2600-1
MIV 4Z9
www.honeywell.com