Rockwell Automation SP120 AC Drive Demo Unit User Manual
Page 21
Running the Demo Unit
4-9
Step 7. Press
, if necessary, until d-01 [
COMMAND
FREQUENCY
] is displayed.
Step 8. Turn the
STOP
/
RUN
switch to
STOP
. Notice that the
output frequency immediately drops to 0. Notice
how long it takes the motor to stop.
Lab 4b: Programming the drive for a ramp-to-rest stop.
Step 1. Press
to enter program mode.
Step 2. Set P-34 to 0 (Ramp-to-Rest).
Step 3. Press
to enter display mode.
Step 4. Press
, if necessary, until the value of d-01
[
COMMAND
FREQUENCY
] is displayed.
Step 5. Turn the
STOP
/
RUN
switch to
RUN
.
ANALOG
CHAN
#1
should be turned fully clockwise. Wait for the drive
to reach full speed.
Step 6. Turn the
STOP
/
RUN
switch to
STOP
. Notice that the
output frequency and voltage decreases over time
(ramps down) to zero.
Lab 4c: Programming the drive for DC injection braking.
DC injection braking is a stopping method whereby DC
current is applied to a single winding in a motor.
Step 1. Set P-34 to 2 (DC Injection).
Step 2. Set P-35 [
DC
BRAKE
CURRENT
] to 100. This specifies
the output current level in percent.
Step 3. Set P-36 [
DC
BRAKE
TIME
AT
STOP
] to 3.0. This sets
the amount of time in seconds that the current
specified in P-35 is applied to the motor. The DC
injection begins when the drive is commanded to
stop.
Step 4. Press
to enter display mode.
Step 5. Press
, if necessary, until the value of d-01
[
COMMAND
FREQUENCY
] is displayed.
Step 6. Turn the
STOP
/
RUN
switch to
RUN
.
ANALOG
CHAN
#1
should be turned fully clockwise. Wait for the drive
to reach full speed.
PR OG
PR OG
PR OG