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 H1-xx = 16 [Motor 2 Selection]. Do not do Control Tuning for applications that switch between motor 1 and motor 2.
Table 1. Control Loop Tuning Selection
|
Mode
|
T3-00
|
Application Conditions and Benefits
|
Applicable Control Method (A1-02 Value)
|
|
V/f
(0)
|
CL-V/f
(1)
|
OLV
(2)
|
CLV
(3)
|
AOLV
(4)
|
OLV/PM
(5)
|
AOLV/PM
(6)
|
CLV/PM
(7)
|
EZOLV
(8)
|
|
Inertia Tuning
|
0
|
|
-
|
-
|
-
|
x
|
-
|
-
|
-
|
x
|
-
|
|
ASR Tuning
|
1
|
To let the set response frequency (including Inertia Tuning) automatically adjust the ASR gain.
|
-
|
-
|
-
|
x
|
-
|
-
|
-
|
x
|
-
|
|
Deceleration Rate Tuning
|
2
|
To automatically adjust the deceleration rate to prevent an ov [Overvoltage] fault.
|
x
|
x
|
x
|
x
|
x
|
x
|
x
|
x
|
x
|
|
KEB Tuning
|
3
|
|
x
|
x
|
x
|
x
|
x
|
x
|
x
|
x
|
x
|
Table 2. Input Data for Control Tuning
|
Input Data
|
Parameters
|
Unit
|
Auto-Tuning Mode
(T3-00 Value)
|
|
Inertia Tuning
(0)
|
ASR (Speed Regulator)
(1)
|
Dec Rate Tuning
(2)
|
KEB Tuning
(3)
|
|
Test Signal Frequency
|
T3-01
|
Hz
|
x
|
x
|
-
|
-
|
|
Test Signal Amplitude
|
T3-02
|
Rad
|
x
|
x
|
-
|
-
|
|
Motor Inertia
|
T3-03
|
Kg∙m2
|
x
|
x
|
-
|
-
|
|
System Response Frequency
|
T3-04
|
Hz
|
-
|
x
|
-
|
-
|
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.
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).
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).
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 Table 3 to the best values.
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].