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:

  • 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

Parameter Settings

Application Conditions and Benefits

Applicable Control Methods (A1-02 Settings)

V/f

(0)

OLV

(2)

OLV/PM

(5)

AOLV/PM

(6)

EZOLV

(8)

Deceleration Rate Tuning

T3-00 = 2

To automatically adjust the deceleration rate to prevent an ov [Overvoltage] fault.

x

x

x

x

x

KEB Tuning

T3-00 = 3

  • To automatically adjust parameter settings to prevent an ov [Overvoltage] fault with the KEB Ride-Thru function.

  • When L3-11 = 1 [Overvoltage Suppression Select = Enabled].

x

x

x

x

x

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 2 to the best values.

Table 2. Parameters set in Control Tuning

Parameters Automatically Set

Deceleration Rate Tuning

KEB Tuning

C1-02 [Deceleration Time 1]

x

-

C1-08 [Deceleration Time 4]

x 1

-

C1-09 [Fast Stop Time]

-

x 2

L2-06 [Kinetic Energy Backup Decel Time]

-

x 3

L3-25 [Load Inertia Ratio]

-

x
 
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 you must not change the Fast Stop time, 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].