Before Auto-Tuning The Drive - YASKAWA L1000A Technical Manual

4.5 Auto-Tuning
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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.
Type
Initial Magnet Pole Search
Parameters Auto-Tuning
Stationary PG Encoder Offset
Auto-Tuning
Rotational PG Encoder Offset
Auto-Tuning

◆ Before Auto-Tuning the Drive

Check the items below before Auto-Tuning the drive.
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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. The holding brake must remain engaged for the entire Stationary Auto-Tuning sequence.
Ensure a brake release digital output signal cannot be issued by the drive. Failure to comply could result in serious injury or death.
WARNING! Sudden Movement Hazard. Do not release the mechanical brake during Stationary Auto-Tuning. Inadvertent brake release
may cause damage to equipment or injury to personnel. Ensure that the mechanical brake release circuit is not controlled by the drive
multi-function digital outputs exclusively.
• Rotational Auto-Tuning is the preferred tuning method because it gives more accurate results than Non-Rotating Auto-
Tuning. Perform Rotational Auto-Tuning when the motor can be uncoupled from the elevator mechanical system
(remove ropes from traction sheave). Perform Stationary Auto-Tuning when the motor and mechanical system cannot
be uncoupled.
• Make sure that the mechanical brake remains applied for all Stationary Auto-Tuning methods. Make sure to release the
brake for all Rotational Auto-Tuning methods.
• When using a motor contactor, make sure it is closed throughout the Auto-Tuning process.
• H1 and H2 signals must be ON when performing Auto-Tuning.
• A digital input programmed for Baseblock (H1-
• Confirm that the motor is mechanically fixed.
• To cancel Auto-Tuning, press the STOP key on the digital operator.
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Table 4.9 Types of Auto-Tuning for PG Encoder Offset
Setting
• 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
T2-01 = 3
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.
• Tunes the PG encoder offset without rotating the motor.
T2-01 = 4
• If the PG encoder offset cannot be tuned properly by this method, try Rotating PG Encoder Offset Tuning.
• Tunes the PG encoder offset while rotating the motor.
T2-01 = 10
• Motor and mechanical system must be uncoupled (ropes must be removed from traction sheave).
Requirements and Benefits
= 8/9) must be set so that the drive is not in a baseblock condition.
YASKAWA ELECTRIC SIEP C710616 38A YASKAWA AC Drive L1000A Technical Manual