Instruction Manual

6–10 Start-Up
Apply Power to Drive
Verify Frequency
Command = 0
Verify Forward
Rotation
Slowly Increase Speed
Verify Direction of
Rotation
14. Check for Correct Motor Rotation.
A. Reapply power to the drive.
B. Verify that the frequency command is at zero Hz. For further information,
refer to step 7.
C. Using the Direction LEDs, verify that forward direction is selected.
D. Startthedriveand slowlyincreasethespeeduntilthemotorbeginstoturn.
Notethedirectionofmotorrotation.Ifthe directionof rotationisasdesired,
proceed to Step E.
If the direction of motor rotation is incorrect, stop the drive andremove all
power. When the HIM Display is no longer illuminated, remove the drive
cover. Verify that the bus voltage measured at terminals 47 (+) and 45 (–)
is zero (see Attention on page 6–9). Interchange any two of the three
motor leads at U, V or W. Repeat Steps A through D.
E. If encoder feedback is being used, verify that the polarity (“+” or “–”) of
[Encoder Freq] equals the polarity of the actual drive output as shown on
the Status Display. If the polarities are the same, go to step F.
If polarities aredifferent, stopthe drive, removeall power. Reversethe “A”
& “A NOT”
OR “B” & “B NOT” wiring. Repeat Steps A throughD.
F. Stop the drive and replace drive cover.
At Speed
+5.00 Hz
15. Low Speed Operation.
(Speed range greater than 20:1)
If Volts/Hertz operation was selected in step 6, proceed to step 20.
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:
Continued on next page
Advanced Start-Up Procedure
Press these keys . . . while following these steps . . . The HIM Display will show . . .
or
ATTENTION: In the following steps, rotation of the motor in an
undesired direction can occur. To guard against possibleinjury and/
or equipment damage, it isrecommended that the motor be discon-
nected from the load before proceeding.
!
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.