3. Test Operation and Adjustment
3-5
3-6-1
V/f control (constant torque) (C30-0 = 1),
V/f control (variable torque) (C30-0 = 2) automatic tuning
(1) Automatic tuning
The Auto-tuning for V/f control (constant torque) or V/f control (variable torque) can be performed in
two modes, basic or extended. The mode selection is allowed by parameter (B19-0). (Note 1, 2)
1) B19-0 = 1: Mode 1: V/f control basic adjustment mode (Execution time: approx. 10 seconds).
The drive automatically adjusts basic parameters, such as boost voltage and brake voltage. In
this phase the motor does not rotate.
The following parameters are automatically adjusted by executing Mode 1.
Table 3-6-1
Parameter No.
Name
A02-2
A03-0
B02-0, 1
Manual torque boost setting
DC brake voltage
R1: Primary resistance
2) B19-0 = 2: Mode 2: V/f control extended adjustment mode (Execution time: approx. 1min.). Use this
method if the motor is completely unloaded only. (No load at motor shaft)
The drive automatically adjusts parameters related to the slip compensation and max. torque
boost. In this phase the motor rotate.
The following parameters are automatically adjusted by executing Mode 2.
Table 3-6-2
Parameter No.
Name
A02-2
A03-0
B02-0, 1
A02-5
A02-6
Manual torque boost setting
DC brake voltage
R1: Primary resistance
Slip compensation gain
Max. torque boost gain
(Note 1) The automatic tuning function (B19-0) cannot be used in modes other than control selected
with the parameter (C30-0). When C30-0 is set to 1 or 2, the following cannot be selected.
B19-0 = 3: Mode 3: Vector control basic adjustment mode
B19-0 = 4: Mode 4: Vector control extended adjustment mode
(Note 2) If the base frequency of the motor is applied on a motor exceeding 120Hz, select Mode 1
(B19-0 = 1). Adjust the slip compensation gain (A02-5) and max. torque boost gain (A02-6)
manually.
