Chapter 5 Parameters
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VFD-B Series
5-36
Revision July 2008, BE16, SW V4.08 & V5.00
02 - 02
Stop Method
Factory Setting: 00
Settings
00
STOP: ramp to stop
E.F.: coast to stop
01
STOP: coast to stop
E.F.: coast to stop
02
STOP: ramp to stop
E.F.: ramp to stop
03
STOP: coast to stop
E.F.: ramp to stop
The parameter determines how the motor is stopped when the AC motor drive receives a valid
stop command or detects External Fault.
1. Ramp:
the AC motor drive decelerates to Minimum Output Frequency (Pr.01-05)
according to the deceleration time and then stops.
2. Coast:
the AC motor drive stops the output instantly upon command, and the motor
free runs until it comes to a complete standstill.
3. The motor stop method is usually determined by the characteristics of the motor load and
how frequently it is stopped.
(1)
It is recommended to use “ramp to stop” for safety of personnel or to prevent
material from being wasted in applications where the motor has to stop after the
drive is stopped. The deceleration time has to be set accordingly.
(2)
If the motor free running is allowed or the load inertia is large, it is
recommended to select “coast to stop”.
For example: blowers, punching machines, centrifuges and pumps.
RUN
STOP
RUN
STOP
Frequency
Frequency
Time
Time
output
frequency
output
frequency
motor
speed
motor
speed
operation
command
operation
command
stops according to
decel eration time
free run to stop
ramp to stop and free run to stop
