Precautions Before Auto-Tuning - YASKAWA GA700 Series Technical Manual

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Inertia Tuning
Inertia Tuning uses the motor speed and torque reference to estimate the system inertia and automatically sets the
drive parameters related to the inertia ratio of the machinery and motor. Use Inertia Tuning for Feed Forward
control or when H1-xx = 7A [MFDI Function Select = KEB Ride-Thru 2 Activate (N.C.)].
Inertia tuning identifies the load inertia and optimizes the speed loop gain and feed forward gain to get a high
level of control capability. You can set the speed response without thinking about the load, which increases the
precision when synchronizing multiple drives. Since the motor can continue to operate during a power outage,
Inertia Tuning keeps the best ramp to stop deceleration curve for KEB Ride-Thru.
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ASR Tuning
ASR Tuning estimates the motor load inertia and automatically sets the parameters. ASR Tuning also uses the
measured load inertia value to do an automatic adjustment after calculating the proportional gain of speed control
(ASR).
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Deceleration Rate Tuning
Deceleration Rate Tuning automatically sets the deceleration rate to prevent an ov [Overvoltage] fault 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).
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KEB Tuning
KEB Tuning automatically sets parameters used for the KEB Ride-Thru function and for the overvoltage
suppression function.
Control Tuning automatically sets the parameters in
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]
L2-06 [Kinetic Energy Backup
Decel Time]
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.
*2 When L2-29 = 0 [Kinetic Energy Backup Method = Single Drive KEB Ride-Thru 1], the drive will automatically adjust C1-09 [Fast
Stop Time] and will not adjust L2-06 [Kinetic Energy Backup Decel Time]. If the Fast Stop time must not change, do not do KEB
Tuning.
*3 When L2-29 = 1, 2, or 3 [Kinetic Energy Backup Method = Single Drive KEB Ride-Thru 2, System KEB Ride-Thru 1, or System
KEB Ride-Thru 2], the drive will automatically adjust L2-06 [Kinetic Energy Backup Decel Time].
◆

Precautions before Auto-Tuning

Examine the topics in this section before you start Auto-Tuning.
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Prepare for Basic Auto-Tuning
• 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.
YASKAWA SIEPC71061705H GA700 Series Technical Manual
Table 4.15
Table 4.15 Parameters set in Control Tuning
Inertia Tuning ASR Tuning
-
-
-
-
x
x
x
x
-
x
x
x
x
to the best values.
Deceleration Rate Tuning
- x
*1
- x
- -
x -
x -
x -
x -
x -
- -
x -
x -
x -
x -
4.8 Auto-Tuning
KEB Tuning
-
-
*2
x
-
-
-
-
-
*3
x
-
4
x
-
-
191