42
Optidrive P2 Elevator User Guide V2.30
Start-up of Gearless (Permanent Magnet) Motor-With Encoder Feedback.
www.InvertekDrives.com
Step 7b - Rotating Encoder offset measurement
(Alternative to Stationary measurement).
An Encoder Offset measurement (Offset between motor poles and magnets) must be carried out when operating a gearless motor.
This measurement should be used if the ropes are removed from the motor (if ropes are not removed then perform the Stationary Encoder
offset measurement), the rotating measurement is more accurate than the Stationary Encoder Offset measurement and is with the brakes
released.
Action
Additional Information
Check ropes are removed from motor sheave.
If motor contactor(s) are controlled by the elevator controller check that they are closed.
Check brakes are released.
Enable V/F mode
Set P4-01 to 2
Close Safe Torque off input
connections
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
3
Give a run command to the
drive (Close T1 to T2)
Record the Encoder offset
value from P0-78. (stabilised
value)
Encoder offset value is shown in P0-78 index 2 (press
up arrow) in the range 0-360 degrees
(Index 2 indicated by lit upper segment)
Note:
It is recommended that this test is repeated
several times (with motor sheave in different
positions) to ensure similar values are obtained
(within 50 °).
e.g. 55 degrees
The motor sheave should move slightly during
the measurement.
If motor sheave does not move or similar
values are not obtained (following repeated
measurements) try increasing P1-11.
Disable the drive
E.g. (Open T1 and T2)
Drive should now show
if not see section
Enter Encoder offset value
Enter an average of the values that were recorded
from P0-78 above into P6-09
Enable Gearless (PM) mode
Set P4-01 to 3
Enable Motor Auto-tune
Set P4-02 to a 1 and press the
button.
1.
The motor contactors will close (if controlled
by the drive “Relay 1”).
2.
The motor brakes will remain applied.
3.
The display will show
. (Test
procedure may take several minutes to
complete).
Once the Auto-tune is completed P4-02 will return
to 0 and the display will show
(P7-01/03/06
will be populated).
Note: Motor Auto-tune will need to be repeated if
the motor, motor cables, motor parameters or
drive control mode is changed in P4-01.
Note: If the motor phases are swapped or the encoder changed/mechanically moved then repeat the Encoder offset measurement.
Once steps 1 through to 7 above have been performed go to Section 13 Comfort Optimisation.
‘
