Rockwell Automation SP120 AC Drive Demo Unit - Manual (Page 22)

Running the Demo Unit 4-10
Step 7. Turn the STOP / RUN switch to STOP . Notice that the
output frequency and voltage dropped to 0
immediately.
Step 8. Reset the following parameters:
P-34 to 1
P-35 to 10
P-36 to 0.0
Lab 5: Setting up an avoidance frequency.
Tools required: None
Avoidance frequency parameters are used to prevent the
drive from continuous operation within a range (band) of
frequencies.
Step 1. Set P-37 [ AVOIDANCE FREQUENCY ] to 30.0 Hz. This
specifies the midpoint of the band.
Step 2. Set P-38 [ AVOIDANCE FREQUENCY BAND ] to 20.0 Hz.
This sets the width of the band. In this case, the
width of the band is set from 20.0 Hz to 40.0 Hz.
Step 3. Turn the speed pot to zero ( ANALOG CHAN #1 should
be turned fully counter-clockwise).
Step 4. Press to enter display mode. Press , if
necessary, until the value of d-01 [ COMMAND
FREQUENCY ] is displayed.
Step 5. Turn the STOP / RUN switch to RUN .
Step 6. Slowly turn the speed pot clockwise, and watch the
display.
Notice that the motor holds up at 20.0 Hz and
speeds up at 40.0 Hz.
Step 7. Press until d-00 [ COMMAND FREQUENCY ] is
displayed.
Step 8. Turn the speed pot to zero, and then slowly turn the
speed pot up and down.
Notice when the motor increases in speed, holds
speed, and decreases speed.
Step 9. Reset the following parameters:
P-37 to 0
P-38 to 0
Step 10. Turn the RUN / STOP switch to STOP .
PR OG