11.2 A: Initialization Parameters
688 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Notes on when Using Other Functions
Function Notes
Decel stall prevention function When you connect a braking resistor to discharge the regenerative power to the drive, set L3-04 = 0
[Stall Prevention during Decel = Disabled].
Note:
If L3-04 = 1 [General Purpose], it is possible that the drive will not stop in the set deceleration
time. Do not change the default settings of these related parameters:
• L3-01 = 1 [Stall Prevention during Accel = Enabled]
• L3-05 = 1 [Stall Prevention during RUN = Deceleration Time 1 (C1-02)]
Auto-Tuning for Induction
Motors
• When A1-02 = 2 or 3 [Control Method Selection = Open Loop Vector or Closed Loop Vector], Auto-
Tune the motor before you operate the drive.
• Disconnect the drive from the motor to do Rotational Auto-Tuning.
• Auto-Tuning runs automatically for approximately 1 minute. Do not do Auto-Tuning with the motor
engaged in the elevator system.
Note:
• If you cannot disconnect the motor from the machine, do Stationary Auto-Tuning. When you do
Stationary Auto-Tuning, the drive energizes the motor and the motor stays stopped.
During this time, the drive automatically measures the necessary motor data. If the motor test
report or the motor nameplate is not available, use Stationary Auto-Tuning.
• Do Stationary Auto-Tuning for Line-to-Line Resistance for better torque characteristics at low
speeds in the V/f Control mode.
• To Auto-Tune a specialized motor, for example a wound motor, prepare a motor test report before
Auto-Tuning and make sure that the motor parameter E2-xx is not too different than the value in
the test report.
Auto-Tuning for PM Motors
You must set the motor data in the drive to run a PM motor.
• When you use a PM motor recommended by Yaskawa
Input the motor code in E5-01. The drive will automatically set E5 and other related motor
parameters to the best values.
• When you use a non-Yaskawa PM motor
Do Auto-Tuning.
– When the motor nameplate or motor test report is available, enter the PM motor parameters
directly with PM Motor Parameter Settings.
– If the motor nameplate or motor test report is not available, and the motor cannot rotate, do PM
Stationary Auto-Tuning.
– If the motor nameplate or motor test report is not available, and the motor can rotate, do PM
Rotational Auto-Tuning.
– When you replace an encoder, make sure that the motor can rotate and do Z Pulse Offset Tuning
or PM Rotational Auto-Tuning.
Note:
• Use in Closed Loop Vector Control for PM mode.
• When you do Auto-Tuning or replace the encoder, make sure that the motor can rotate.
• Set the Encoder Z-Pulse Offset.
• Refer to Closed Loop Vector Control for induction motors for information about the signal to use
and the adjustment method.
Braking Resistor Overheat
Protection
When you use a braking resistor other than the optional Yaskawa braking resistor unit (LKEB-series),
this function uses the thermal overload relay to detect braking resistor overheat Load a sequence
program that cuts the drive input power supply when the braking resistor overheats.
Note:
Refer to 73 when you load the sequence circuit.
Continuous operation function
Do not use the momentary power loss continuous operation function and the Auto Restart function. If
you use these functions, there is a risk that the motor will coast to a stop if the brake is open when there
is a momentary power loss and the drive is operating or if there is a fault.
Set the these parameters:
• L2-01 = 0 [Power Loss Ride Through Select = Disabled]
• L5-01 = 0 [Number of Auto-Restart Attempts = 0]
Torque limit function The motor rated torque sets the value for L7-01 to L7-04 [Torque Limit]. If there will not be sufficient
torque during start up, replace the drive with a larger capacity drive and set the torque limit between
200% and 300%. The L7-01 to L7-04 default setting is 200%.
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