Precautions Before Auto-Tuning - YASKAWA CR700 Technical Manual

3.8 Auto-Tuning
ASR Tuning
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ASR Tuning estimates the motor load inertia and automatically sets the parameters as well as Inertia Tuning.
Additionally, an automatic adjustment is carried out after calculating the proportional gain of speed control
(ASR), based on the measured load inertia value.
Deceleration Rate Tuning
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Deceleration Rate Tuning automatically sets the deceleration rate so that an ov [Overvoltage] fault does not occur
during motor deceleration. Set C1-11 [Accel/Decel Time Switchover Freq] first to automatically set parameters
C1-02 [Deceleration Time 1] (high speed range) and C1-08 [Deceleration Time 4] (low speed range).
ASR and Inertia Tuning automatically sets the following parameters to the optimal values.
Parameters Automatically Set
C1-02 [Deceleration Time 1]
C1-08 [Deceleration Time 4]
C1-09 [Fast Stop Time]
C5-01 [ASR Proportional Gain 1]
C5-17 [Motor Inertia]
C5-37 [Motor 2 Inertia]
C5-18 [Load Inertia Ratio]
C5-38 [Motor 2 Load Inertia Ratio]
L3-24 [Motor Accel Time @ Rated
Torque]
L3-25 [Load Inertia Ratio]
n5-02 [Motor Inertia Acceleration Time]
n5-03 [Feed Forward Control Gain]
*1 The drive automatically sets C1-08 [Deceleration Time 4] only when C1-11 [Accel/Decel Time Switchover Freq] ≠ 0.

Precautions before Auto-Tuning

◆
Examine the topics in this section before you start Auto-Tuning.
Prepare for Basic Auto-Tuning
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• You must input data from the motor nameplate or motor test report to do Auto-Tuning. Make sure that this data
is available before you do Auto-Tuning.
• For best performance, make sure that the drive input supply voltage is equal to or more than the motor rated
voltage.
Note:
Better performance is possible when you use a motor with a base voltage that is less than the input supply voltage (20 V for 200 V class
models and 40 V for 400 V class models). If the input power supply is equal to the motor rated voltage, the drive output voltage will not
be sufficient and performance will decrease.
• Push on the keypad to cancel Auto-Tuning.
• If a Safe Disable input signal is input to the drive during Auto-Tuning, Auto-Tuning measurements will not
complete successfully. If this occurs, cancel Auto-Tuning, then do it again.
• Table 3.12 shows the status of multi-function input/output terminals during Auto-Tuning.
190
Inertia Tuning
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x
x
x
x
x
x
x
x
YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
ASR Tuning Deceleration Rate Tuning
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x
x
x
x
x
x
x
x
x
x
*1
x
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