Rockwell Automation 20P PowerFlex Digital DC Drive - Manual (Page 99)

Rockwell Automation Publication 20P-UM001I-EN-P - February 2013 99
Drive Start Up Chapter 2
Verify Motor Rotation and Run Feedback Polarity Checks
The jog function (on the HIM or terminal block) will be used to check motor
direction and encoder/resolver operation. If the STS LED is not flashing green at
this point, see
Figure 57 on page 90 for more information.
1. When checking motor polarity, the drive will have power applied and
the motor will rotate. Verify that the motor is uncoupled from the load.
If the motor cannot be uncoupled from the load, the following motor
checks are recommended.
• All electrical connections are tight.
• The brushes are properly seated.
• The motor shaft is free to rotate.
2. Access the “Motor Control” file, “Speed Feedback” group.
3. Verify that Par 414 [Fdbk Device Type] is set to 3 “Armature” (default).
4. Access the “Speed Command” file, “Discrete Speeds” group.
5. Verify that Par 266 [ Jog Speed] is set to the default value (100 rpm) or
to an acceptable speed level for this test.
6. If analog input 1 is wired, access the “Analog Inputs” group, and verify
that the voltage level is 0V in Par 1404 [Analog In1 Value].
7. While viewing Par 233 [Output Voltage], assert a Jog command (via the
HIM keypad or digital input on the I/O terminal block) and observe
the motor rotation direction.
8. Verify whether or not Par 233 [Output Voltage] is positive.
9. If the observed rotation direction is correct, continue with step 15 on
page 100 . If the observed rotation direction is incorrect, continue with
step 10 below, while referring to the motor connection diagrams in
Figure 58 on page 100 .
10. Remove power from the drive.
11. Make certain power is turned off and locked out.
12. Switch the armature leads connected to C (+) and D (–).
ATTENTION: Prior to running the motor direction and polarity checks, you must
provide a hard wired maintained external operator accessible coast/stop push
button to disable the machine in case of improper operation. Uncontrolled
machine operation can result if this is not done. Failure to observe this
precaution could result in severe bodily injury or loss of life.
ATTENTION: Prior to running the motor direction and polarity checks, uncouple
the motor from equipment or processes that may be damaged by incorrect
rotation of the motor or speed references.