Veikong gpd 515/g5 Startup Manual page 175

5 . 4 0 S T O P P I N G METHOD
C . Data 2 : Full-range DC Injection Stop
When a STOP command is issued, there is a 0.5 second time delay, before a DC injection
current is applied to two phases of the motor's stator winding. The duration of DC braking
is a time period proportional to b 2 - 0 4 (at 10% output frequency) and the level of output
frequency at the time the STOP command is issued.
Braking torque is 50-70% of full load motor torque.
EXAMPLE
b 2 - 0 4 = 0.5 sec (at 10% output)
Braking time at Fmax (100% output frequency) =
RUN CMD
OUTPUT
FREQUENCY
0.5 sec
COASTING
Full Range DC Injection Braking Stop Sequence
D . Data 3 : Coast to Stop With Timer
When programmed for coast to stop with timer, a Run command is ignored if issued during
the time the motor would normally be decelerating ( C 1 - 0 2 ), or for the minimum base
block time ( L 2 - 0 3 ), whichever is longer.
Output Frequency
Run Command
Continued
STOP
DC BRAKING TIME
Coasting
ON OFF
100%
10%
b2-04 x 10
DC IN-
JECTION
BRAKING
TIME
Decel Time 1
( C1-02 )
ON OFF
Run Command ignored
5-89
x 0.5 = 5 sec.
b2-04
0 10%
OUTPUT FREQUENCY
AT TIME OF STOP COMMAND
Accel Time 1
( C1-01 )
ON
100%