Rockwell Automation FlexPak 3000 Power Module Version 4.2 - Manual (Page 52)

DRIVE SETUP AND ADJUSTMENT
FlexPak 3000 49’1340 e 4-10
4.10 Verify the Correct Direction of Motor Rotation
WARNING
If tachometer and/or rotation is incorrect, sudden and rapid acceleration may result which can cause
overspeed of the drive. Failure to observe this precaution could result in bodily injury.
1. Turn power to the drive OFF.
2. Verify the operation of the Coast/Stop pushbutton using an ohmmeter. When pressed, the
ohmmeter should read infinite ohms (open); when released, the reading should be 0 (short).
3. Turn power to the drive ON.
4. After power-up, select ARMATURE VOLT for FEEDBACK SELECT by taking the following
path from the main menu to access this parameter:
Speed/Voltage Loop (SPD)

 Speed/Voltage Loop (SPD) Feedback*
Refer to Section 5 on "How to Change Parameter Values".
5. Initiate a "JOG" command to verify that the motor is rotating in the desired direction for the
"Forward" command.
6. If the direction of rotation is incorrect, Stop the drive and then disconnect and lockout or tag
power to the drive.
7. To change the direction of motor rotation, reverse the connection of the motor armature
leads 1C and 1D.
NOTE: Wrong rotation direction can be caused by incorrect wiring of the field (3C and 3D).
4.11 Determination of D-C Tachometer Lead Polarity
1. Turn power to the drive ON.
2. After power-up, select ARMATURE VOLT for FEEDBACK SELECT by using the following
path from the main menu to access this parameter:
Speed/Voltage Loop (SPD)

 Speed/Voltage Loop (SPD) Feedback*
Refer to Section 5 on "How to Change Parameter Values".
3. Select the forward direction (as indicated above the forward/reverse key) and verify that the
(+) tachometer lead is connected to terminal 21 or 22 corresponding to J14 setting, and that
the (-) tachometer lead is connected to terminal 23. If the (+) tachometer lead is not
connected to terminal 21 or 22, stop the drive. Disconnect and lockout or tag power to the
drive. Reverse the connection of the tachometer leads.
4. Initiate a JOG command.
5. Use a voltmeter on the tachometer leads to determine the lead polarity for the Forward
direction of rotation. Label the tachometer leads accordingly, (+) and (-).
4.12 Adjustments
This section describes Zero adjustments to compensate for signal drift when tachometer or
armature feedback is used. These adjustments are available by accessing the Speed/Voltage
Loop (SPD) Feedback menu from the Speed/Voltage Loop (SPD) at the Main Menu.
Speed/Voltage Loop (SPD)

 Speed/Voltage Loop (SPD) Feedback*