4-8
4
Open Loop Vector Control (A1-02 = 2)
Always perform autotuning. If the motor can be operated, perform rotating autotuning. If the motor cannot be
operated, perform non-rotating autotuning 1 or 2. Refer to the following section on Autotuning for details on
autotuning.
Closed Loop Vector Control (A1-02=3)
Always perform autotuning. If the motor can be operated, perform rotating autotuning. If the motor cannot be
operated, perform non-rotating autotuning 1 or 2. Refer to the following section on Autotuning for details on
autotuning.
îš‹ Autotuning
Autotuning sets motor parameters automatically when using Open Loop or Closed Loop Vector control, when
the cable length is long or the installation has changed.
îš„ Setting the Autotuning Mode
One of the following three autotuning modes can be set.
• Rotating autotuning
• Non-rotating autotuning 1
• Non-rotating autotuning for line-to-line resistance only
• Non-rotating autotuning 2
Rotating Autotuning (T1-01 = 0)
Rotating autotuning is used for Open Loop and Closed Loop Vector control only. Set T1-01 to 0, input the data
from the motor nameplate, and then press the RUN key on the Digital Operator. The Inverter will operate the
motor for approximately 1 minute and set the required motor parameters automatically.
Non-rotating Autotuning 1 (T1-01 = 1)
Non-rotating autotuning can be used for Open Loop and Closed Loop Vector control only. Set T1-01 to 1,
input the data from the motor nameplate, and then press the RUN key on the Digital Operator. The inverter
will supply power to the non-rotating motor for approximately 1 minute and some of the motor parameters
will be set automatically. The remaining motor parameters will be set automatically during the first time oper-
ation.
Non-rotating Autotuning for Line-to-Line Resistance (T1-01 = 2)
Non-rotating autotuning for line-to-line resistance can be used in any control mode. This is the only possible
autotuning for V/f control and V/f control with PG.
It can be used to improve the performance when the motor cable is long, the cable length has changed or when
the motor and inverter have different capacities.
To perform autotuning in V/f control or V/f control with PG, set T1-02 (Motor rated power) and T1-04 (Motor
rated current) and then press the RUN key on the Digital Operator. The Inverter will supply power to the non-
rotating motor for approximately 20 seconds and the Motor line-to-line resistance and cable resistance will be
automatically measured.
Non-rotating Autotuning 2
Non-rotating autotuning 2 is used for Open Loop Vector control and Closed Loop Vector Control. Set T1-01 to
4 and parameter T1-09 (Motor no-load current) will be added as an input parameter. Input all data from the
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