4.6 Auto-Tuning
148 SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
◆ Control Tuning
To increase drive responsiveness and prevent hunting, use Auto-Tuning to automatically adjust the control-related
parameters.
These types of Auto-Tuning are available for the control system:
• Inertia Tuning
• ASR Tuning
• Deceleration Rate Tuning
• KEB Tuning
Note:
If you do Control Tuning, you cannot set any parameter of H1-xx = 61 [H1-xx: MFDI Function Select = Motor 2 Select]. Do not do
Control Tuning for applications that switch between motor 1 and motor 2.
Table 4.13 Control Loop Tuning Selection
Mode
Value of
Control
Loop Tune
Selection
Application Conditions and
Benefits
Applicable Control Method
(Value of A1-02 [Control Method])
V/f
Control
(0)
PG V/f
Control
(1)
OLVec
tor
(2)
CLVec
tor
(3)
Adv
OLVec
tor
(4)
PM
OLVec
tor
(5)
PM
AOLVec
tor
(6)
PM
CLVec
tor
(7)
EZ
Vector
(8)
Inertia Tuning 0
• For Feed Forward Control
• When L2-29 = 2 [KEB Method =
Single KEB2 Ride-Thru].
• When MFDI H1-xx = 42 [H1-xx:
MFDI Function Select = KEB
Thru2 NC].
- - - × - - - × -
ASR Tuning 1
To let the set response frequency
(including Inertia Tuning)
automatically adjust the ASR gain.
- - - × - - - × -
Deceleration
Rate Tuning
2
To automatically adjust the
deceleration rate to prevent an ov
[Overvoltage] fault.
× × × × × × × × ×
KEB Tuning 3
• To automatically adjust parameter
settings to prevent an ov
[Overvoltage] fault with the KEB
Ride-Thru function.
• When L3-11 = 1 [Overvolt
Supression Select = Enabled].
× × × × × × × × ×
Table 4.14 Input Data for Control Tuning
Input Data Unit
Auto-Tuning Mode
(Value of T3-00 [Control Loop Tune Selection])
Inertia Tuning
(0)
ASR (Speed
Regulator)
(1)
Dec Rate Tuning
(2)
KEB Tuning
(3)
T3-01 [Inertia Test Frequency] Hz × × - -
T3-02 [Inertia Test Amplitude] Rad × × - -
T3-03 [Motor Inertia] Kg∙m
2
× × - -
T3-04 [System ResponseFrequency] Hz - × - -
■ 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 = 42 [H1-xx: MFDI Function Select = KEB Thru2 NC].
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.
■ 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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