Appendix
– PM Alignment Procedure
13
c. Drive asserts SPD_REG_RLS and
CLOSE_CONTACT (all other outputs
will operate as programmed and have
no special status or benefit during the
Alignment Procedure)
d. Motor Contactor closes
e. Drive asserts BRAKE_PICKED, if used
f.
Brake is lifted
g. Drive starts the Open Loop Alignment
running at approximately 1/8
th
of the
rated motor speed (A5)
h. When the Alignment is finished, the
drive will go to zero speed and simulate
removal of the run command (i.e. SPD
REG RLS = 0 (false); CLOSE
CONTACT = 0 (false)) even if Run
Command is still being asserted
i.
Run Command is removed
During the test, the motor should rotate for
about four seconds and the RUN light will be lit
for the duration of the procedure.
Erratic movement of the motor may occur
during acceleration and deceleration
segments of the alignment, but constant
speed operation will be smooth. If the
motor is jerking as it is rotating, increase
the OL ALIGN SCALE (A5) by 0.5.
If the alarm
SPD DEV ALM
is displayed,
increase the value of SPD DEV ALARM
LVL (A1) then retry procedure to see what
fault the drive may actually be getting. The
SPD DEV ALM will not allow the alignment
procedure to finish and must be moved out
of the way to proceed.
If the fault
SPD DEV FLT
is displayed,
first, verify the shield of the encoder cable
is properly grounded. Then retry the
alignment procedure. If the fault still exists,
increase SPD DEV FLT LVL (A1), and
then retry alignment procedure.
If the fault
OVERCURR FLT
is displayed;
decrease ALIGN VLT FACTOR (A4)
and/or the OL ALIGN SCALE (A5) retry
alignment procedure
If
ENCODER FAULT
or
TACH LOSS
is
displayed, verify that the encoder is
working or that the brakes on the motor
are being picked.
6) View the value of ENCODER ANG
OFST(A5). If the value is 30000, the
alignment procedure did not work and
must be redone. If the, ENCODER ANG
OFST (A5) is 00000, the alignment
procedure passed.
7)
Enter the value in ‘Measured PPR’ (D1)
into ‘Encoder Pulses’ (A1)
8) Run motor at 20% contract speed and
verify alignment is correct.
If ropes are not attached, set INERTIA
(A1) to 0.25 seconds
If the SPD DEV FLT occurs, check if
TORQ CURR (D2) is greater than 5%
(>5%). If this is the case, repeat the
alignment procedure.
9) Run the motor at 100% contract speed.
While the motor is running at contract
speed, make note of number in the
‘Measured PPR’ (D1).
10)
Enter the ‘Measured PPR’ from above at
contract speed in
to ‘Encoder Pulses’ (A1)
Auto Alignment Procedure
Auto Alignment is a function that will calculate
the alignment angle without the need to spin
the motor. This procedure has to be done with
the brake set. This is especially useful for
replacing encoders. Auto Alignment may be
enabled two separate ways, one way is to
enable the function through the operator and
the other is to enable Auto Align by giving the
drive a run command. In order for the function
to properly work, all faults must be cleared
(FAULT LED is off), the brake must be set, and
the motor contactor must pull in.
NOTE: If HF Inject can be performed, it is
recommended that the HF Inject be performed
instead of the Auto Alignment because HF
Inject is more reliable.
1) In order to accurately measure the
alignment, the brake must be set and the
motor contactor must be closed.
Depending on the method used for
enabling Auto Alignment, drive signals
may be used in conjunction with the
contactor.
2) Run the Auto Alignment (U10) to
determine the position of the motor poles.
Press Enter, then the UP Arrow to display:
10:00 May 4
U0 UTILITY
U10 ALIGNMENT
READY
RUN
USER
TORQUE
LIMIT
FAULT
SUBMENU
DATA ENTRY
