Rockwell Automation 1336S Plus FRN 1.xx-5.xx - Manual (Page 74)

4–10 Start-Up
20. Low Speed Operation.
(Speed range greater than 20:1)
If Volts/Hertz operation was selected in
step 11, proceed to step 25.
Slip @ F.L.A. Adjustment.
To increase the steady state torque
performance of the motor at low speeds,
the default Speed Control method is Slip
Compensation. The factory default value
for [Slip @ F.L.A.] is “1.0 Hz.” Optimum
motor performance depends on accurate
setting of [Slip @ F.L.A.].
Estimate your motor slip value using the
following:
Motor Sync. RPM – Motor Rated RPM
Motor Sync. RPM
Example:
x Motor Rated Freq. (Hz)
1800 – 1778
1800
x 60 = 0.7 Hz Slip @ F.L.A.
Set Slip @ F.L.A. Value
or
This will provide a starting point for slip
compensation adjustment. If necessary,
further adjustment can be made while the
motor is under load.
A. From the Status Display, press the
Enter key (or any key). “Choose
Mode” will be displayed.
B. Press the Increment (or Decrement)
key until “Program” is displayed.
C. Press Enter.
D. Press the Increment key until “Feature
Select” is displayed.
E. Press Enter.
F. Press the Increment or Decrement keys
until “Slip @ F.L.A.” is displayed.
Press SELect. The first character of
line 2 will now flash.
G. Use the Increment/Decrement keys to
program the value calculated above,
then press Enter.
Choose Mode
EEProm
Choose Mode
Program
Metering
Feature Select
Dwell Frequency
Slip @ F.L.A.
Slip @ F.L.A.
0.7 Hz