Chapter 5 Parameters|VFD-B Series

02 - 02 Stop Method

Settings

00 STOP: ramp to stop

01 STOP: coast to stop

02 STOP: ramp to stop

03 STOP: coast to stop

Factory Setting: 00

E.F.: coast to stop

E.F.: coast to stop

E.F.: ramp 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)

2. Coast:

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.

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.

Frequency

output

frequency

motor

speed

Frequency

output

frequency

motor

speed

operation

command

Time

RUN

stops according to

decel eration time operation

STOP

command

RUN

Time

free run to stop

STOP

ramp to stop and free run to stop

5-36

Revision July 2008, BE16, SW V4.08 & V5.00