Stop Method - Delta VFD-B User Manual

Chapter 5 Parameters|VFD-B Series
02 - 02

Stop Method

Settings
The parameter determines how the motor is stopped when the AC motor drive receives a valid
stop command or detects External Fault.
1. Ramp:
2. Coast:
3. The motor stop method is usually determined by the characteristics of the motor load and
how frequently it is stopped.
(1)
(2)
For example: blowers, punching machines, centrifuges and pumps.
Frequency
output
frequency
motor
speed
operation
command
5-36
00 STOP: ramp to stop
01 STOP: coast to stop
02 STOP: ramp to stop
03 STOP: coast to stop
the AC motor drive decelerates to Minimum Output Frequency (Pr.01-05)
according to the deceleration time and then stops.
the AC motor drive stops the output instantly upon command, and the motor
free runs until it comes to a complete standstill.
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.
If the motor free running is allowed or the load inertia is large, it is
recommended to select "coast to stop".
stops according to
decel eration time
RUN
STOP
ramp to stop and free run to stop
Frequency
output
frequency
motor
speed
Time
operation
RUN
command
Revision July 2008, BE16, SW V4.08 & V5.00
Factory Setting: 00
E.F.: coast to stop
E.F.: coast to stop
E.F.: ramp to stop
E.F.: ramp to stop
Time
free run to stop
STOP