Rockwell Automation 1395 Digital DC Drive FRN 5-10.10/9.30 - Manual (Page 261)

Chapter 8
Start–Up
8-17
4. Connect DC Voltmeter to Terminal A1 (+) and A2 (–) at the output of
the main contactor.
5. Apply power to the drive.
6. Rotate motor shaft in CCW (counter clockwise) direction as viewed
from the commutator end, using an externally applied mechanical force
to the motor shaft.
7. Measure the voltage at A1 (+) and A2 (–). Set the meter range to
50VDC to start with, and then work down until a reading can be
obtained. Voltage should be positive at A1 with respect to A2 (voltage
magnitude is unimportant).
If polarity is correct, go to the next section: Verification of Drive
Calibration. If polarity is incorrect, Remove power immediately.
8. Make certain power is turned off and locked out.
9. Switch armature leads A1 and A2. If tachometer feedback is used, the
tachometer leads must also be switched. If an encoder is used, one of
the channel leads must also be switched. Verify that the direction of
rotation has been corrected by switching the power back on. Turn off
power.
10. Verify correct polarity of velocity feedback. Rotate the motor shaft in
CCW direction as viewed from the commutator end using an externally
applied mechanical force. Using the Programming Terminal, verify
that the speed feedback value is positive at Parm 106 (Velocity Fdbk).
If polarity is incorrect, and an encoder or tachometer is used, verify
that wiring for the device is correct.
If polarity is incorrect, and armature feedback is used, verify that the
motor armature and field leads are properly connected to the drive
output.
Verification of Drive Calibration 1. Verify correct scaling of AC Line Voltage feedback. Measure the
incoming AC line voltage and verify that the RMS value is equal to the
value shown in Parm 116 (AC Line Voltage).
If the value of Parm 116 does not match the measured incoming AC
line voltage, change the value of Parameter 740 (K AC Volts) until the
measured voltage agrees with Parm 116. Increasing Parm 740 increases
the value in Parm 116.
2. Enable the normal operation of the ECOAST circuit by removing the
lock on the input to TB3–4 to 5 that was holding it in the open state.
3. Enter a speed reference of <25% base speed using whichever external
device has been configured to send data to Parm 154. Verify correct
value by observing Parm 154 (Vel Ref Whole).
4. Command the drive to start and accelerate to the velocity reference of
Parm 154 using the Normal Start input from the external device which
has been previously configured to control the normal start/stop
operation of the drive.
5. Verify that the motor starts and accelerates to the set speed by
comparing the value of Parm 154 (Vel Ref Whole) to Parm 106
(Velocity Fdbk).