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5.11.2 Absolute Encoder
Setup (no ropes)
Initial Start Up
FAILd: The encoder position samples are not consistent within 4,000
counts after 11 samples. In this case try the procedure again and
note the learned values. If all displayed values are consistent, it
would be sufficient to use an approximate average and enter it into
LF.77. Otherwise, if the positions are sporadic and not consistent,
verify motor data parameters LF.11-19 then relearn the motor data
with S_Lrn. If still unable to learn the encoder position with SPI, refer
to section 5.11.2 to learn it with sheave movement.
FailE: A drive fault occured during the learn process. View error in
0.Lf.98 and resolve to continue
The following will outline the procedure for aligning an absolute encoder
to the pole of a permanent magnet motor and the following encoders:
Hiperface, Endat, SIN/COS. The motor must be mounted in place and be
electrically connected to the elevator controller. The motor encoder must
also be connected to the controller. The motor must be able to spin freely
either by mechanically releasing the brake or through normal electrical
release.
If at any point during the set up process, if the drive should give the
error E.ENCC, the display will change automatically to 2.LF.26 and
display the error code from the encoder. Refer to parameter LF.26
for further information.
Initial Steps
1) Verify the motor is correctly connected to the drive, i.e. phase U->U,
V->V, W->W. With PM motors you can not have an arbitrary phasing.
If direction reversal is required, the system direction can be reversed
in LF.28 after the pole position is learned.
2) Verify the correct mode of operation. LF.4 should be set to either PCLSd
or P9LSS. If this is not the case see parameter US.10 to change the
con guration mode.
3) If not already done, enter the motor nameplate data and machine
data in parameters LF.10 to LF.25. Learn the motor with the auto tune
function, see sections 5.6.2 and 5.6.3.
4) Verify the correct encoder feedback card is installed in the drive. See
parameter 0.LF.26. Enter the encoder ppr in parameter LF.27. Make
sure LF.28 = 0 and the sample time, LF.29 = 4 (4mSec.).
Alignment Process
1) Set LF.3 = P Lrn. The display should con rm with StArt.
2) Press and hold the inspection up switch. Motor current will begin to ow
in one phase and the current will ramp up to the motor’s rated value.
The motor sheave should turn slowly and then stop when the motor
rotor has lined up with one of the motor poles. The display should show
HIPERFACE, ENDAT,
SIN/COS Encoders
i