Startup Procedure and Test Run
4
4.6 Auto-Tuning
SIEPYEUOQ2A01G AC Drive Q2A Technical Manual 149
Note:
• If you cannot operate the motor with the conditions in step 2 for the first test run and if the values set in E2-02 and E2-03 are much
different than data in the official test report for the motor and the data listed in Defaults by Drive Model and Duty Rating ND/HD on
page 508, these problems can occur:
–Motor vibrations or hunting
–Not sufficient torque
–Overcurrent
In elevator applications, there is a risk of the cage falling and causing personal injury.
Do one of these precautions to decrease the risk:
–After doing Stationary Auto-Tuning, operate the drive as specified by the conditions and procedure above.
–Set T1-12 = 0 [Test Mode Selection = No].
–Do Rotational Auto-Tuning.
• If you initialize the drive after completing Step 1, do the procedure beginning from Step 1 again.
• For general-purpose motors, the target value for E2-02 is 1 Hz to 3 Hz, and the target rated current for E2-03 is 30% to 65%. Larger
capacity motors have a lower rated slip, and a smaller ratio for the no-load current rated current. Refer to Defaults by Drive Model and
Duty Rating ND/HD on page 508 for details.
■ Precautions before Stationary Auto-Tuning for Line-to-Line Resistance and Stator
Resistance Auto-Tuning
In V/f control, when the motor cable is 50 meters (164 feet), do Stationary Auto-Tuning for Line-to-Line
Resistance.
WARNING! Electrical Shock Hazard. In Stationary Auto-Tuning, the drive applies voltage to the motor. Do not touch the motor
until Auto-Tuning is complete. Failure to obey could cause serious injury.
■ Precautions before Inertia Tuning and ASR Tuning
Before Inertia Tuning or ASR Tuning, check these items:
WARNING! Electrical Shock Hazard. In Rotational Auto-Tuning, the drive applies voltage to the motor before the motor rotates.
Do not touch the motor until Auto-Tuning is complete. Failure to obey could cause serious injury.
• Do rotational motor parameter tuning or look at the motor test report or nameplate to enter the values manually.
• Make sure that the motor magnetic brake is released.
• Connect the motor and load.
• Make sure that external force from the machine will not cause the motor to rotate.
• Make sure that the machine does not prevent reverse rotation. You cannot do Inertia Tuning or ASR Tuning with
machines that prevent reverse rotation.
• When the motor can rotate during Auto-Tuning, check for safety issues near the drive, motor, and machine.
Note:
If there are gears between the machine and motor shaft, Inertia Tuning or ASR Tuning are possibly not applicable.
■ Precautions before Using Deceleration Rate Tuning and KEB Tuning
Before Deceleration Rate Tuning or KEB Tuning, check these items:
Note:
• Do not do Deceleration Rate Tuning if you use a braking resistor unit or a regenerative converter.
• Do Deceleration Rate Tuning and KEB Tuning with the load attached to the motor.
• Do not do Deceleration Rate Tuning or KEB Tuning for these applications:
In Deceleration Rate Tuning and KEB Tuning, the drive will automatically rotate the motor forward and accelerate and decelerate the
motor again and again.
–On a machine that does not let the motor rotate forward
–In applications with a small range of operation (trolleys and other such applications that can only move linearly)
–In elevator applications
–Applications where sudden acceleration and sudden deceleration are not applicable.
• To do KEB Tuning with the external main circuit capacitors connected to the drive, set L3-26 [DC Bus Capacitors Extension] then do
KEB Tuning.
• Do not do KEB Tuning or Deceleration Rate Tuning if the drive is set to use H1-xx = 61 [H1-xx: MFDI Function Select = Motor 2
Select]. Failure to obey can cause an ov [Overvoltage] fault.
◆ Auto-Tuning for Induction Motors
This section gives information about Auto-Tuning for induction motors. Set these parameters for Auto-Tuning:
• Motor parameters E1-xx [E1: V/F PARAMETER MOTOR 1], E2-xx [E2: MOTOR 1 PARAMETERS] (E3-xx
[E3: V/F PARAMETER MOTOR 2], E4-xx [E4: MOTOR 2 PARAMETERS] for motor 2)
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