Yaskawa L1000E AC Drive Technical Manual for CIMR-LE Models for Elevator Applications - Manual (Page 111)

4.5 Auto-Tuning
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■ Auto-Tuning of PG-E3 Encoder Characteristics
This feature optimizes the drive settings for the characteristics of the PG-E3 speed-control option card for the ERN1387
encoder (manufactured by HEIDENHAIN) while rotating the motor. Perform Auto-Tuning to obtain accurate position
data from the motor rotor for driving a PM motor. This type of Auto-Tuning automatically sets the characteristics of the
PG-E3 option card for the ERN1387 encoder in parameters F1-66 to F1-81 (Encoder Adjust 1 to 16).
Note: 1. The motor rotates during execution of Auto-Tuning of PG-E3 encoder characteristics. Before starting, refer to the drive technical
manual.
2. Auto-Tuning of PG-E3 encoder characteristics adjusts the unique characteristics of the ERN1387 encoder connected to the drive by
using a PG-E3 option card. This type of tuning should be performed when setting up the drive or after replacing the encoder or drive.
The signal lines between the PG-E3 option card and the ERN1387 encoder must be connected between the R+ and R- terminals while
this type of tuning is performed.
3. The setting values of parameters F1-66 to F1-81 are reset to factory default values when A1-03 is set to 2220. The setting values of
parameters F1-66 to F1-81 are modified at completion of Auto-Tuning of PG-E3 encoder characteristics.
■ PG Encoder Offset Auto-Tuning
PG encoder Offset Tuning is used for PM motors (A1-02 = 7). It measures the angle between the PG encoder zero
position and the rotor magnet orientation. PG encoder offset tuning should be performed when:
• setting up the drive for the first time,
• after initialization,
• after changing the motor rotation direction (b1-14),
• after changing the encoder rotation direction (F1-05),
• or after replacing the encoder.
Properly set the motor and PG encoder data before performing PG Encoder Offset Tuning.
Table 4.9 Types of Auto-Tuning for PG Encoder Offset
◆ Before Auto-Tuning the Drive
Check the items below before Auto-Tuning the drive.
■ Basic Auto-Tuning Preparations and Precautions
WARNING! Sudden Movement Hazard. When performing Rotational Auto-Tuning for motor data or PG encoder offset, always
uncouple the motor from the mechanical system (remove ropes from traction sheave). Performing Rotational Auto-Tuning with the
mechanical system connected to the motor can cause hazardous situations, injury to personnel and damage to the equipment.
WARNING! Electrical Shock Hazard. Do not touch the motor during Auto-Tuning. Lethal voltages may be present on the motor case.
Failure to comply may result in serious injury from electrical shock.
WARNING! Electrical Shock Hazard. When executing Stationary Auto-Tuning for motor data or PG encoder offset, the motor does not
rotate, however, power is applied. Do not touch the motor until Auto-Tuning is completed. Failure to comply may result in death or
serious injury from electrical shock.
WARNING! Sudden Movement Hazard. Use parameter S1-12 to enable/disable automatic switching of the Motor Contactor Control
output signal during Auto-Tuning. When using setting S1-12 = 1, ensure that the multi-function output terminals are properly wired and
in the correct state before setting parameter S1-12 = 1 Enabled. Failure to comply could result in damage to the drive, serious injury or
death.
Type Setting Requirements and Benefits
Initial Magnet Pole Search
Parameters Auto-Tuning
T2-01 = 3
• Should be performed after motor Auto-Tuning in order to determine the PG encoder tuning method.
• Attempts to detect the motor rotor position, determines whether PG encoder offset can be tuned using Stationary Encoder Offset
Tuning and sets parameters needed for Initial Magnet Pole Search (n8-36, n8-37).
• When using the Rescue Operation mode, perform this tuning to let the drive automatically set the parameters needed for Initial
Magnet Pole Search with power supply from a battery or UPS (n8-81, n8-82).
• Must be performed when using an incremental PG encoder.
Important: If this tuning fails when using a PG-X3 card with an incremental PG encoder the motor cannot be driven using an incre-
mental PG encoder. Change the PG encoder to an absolute PG encoder.
Stationary PG Encoder Offset
Auto-Tuning
T2-01 = 4
• Tunes the PG encoder offset without rotating the motor.
• If the PG encoder offset cannot be tuned properly by this method, try Rotating PG Encoder Offset Tuning.
Rotational PG Encoder Offset
Auto-Tuning
T2-01 = 10
• Tunes the PG encoder offset while rotating the motor.
• Motor and mechanical system must be uncoupled (ropes must be removed from traction sheave).