4
-10
•
To cancel autotuning, always use the STOP Key on the Digital Operator.
•
Power will be supplied to the motor when stationary autotuning is performed even though the motor will
not turn. Do not touch the motor until autotuning has been completed.
Setting the Autotuning Mode
Rotational Autotuning (T1-01
=
0)
Rotational autotuning is used for open-loop vector control and flux vector control. Set T1-01 to 0, input the
data from the nameplate, and then press the RUN Key on the Digital Operator. The Inverter will stop the
motor for approximately 1 minute and then set the required motor constants automatically while operating the
motor for approximately 1 minute.
Stationary Autotuning 1 (T1-01
=
1)
Stationary autotuning1 is used for open-loop vector control and flux vector control. Set T1-01 to 1, input the
data from the nameplate, and then press the RUN Key on the Digital Operator. The Inverter will supply power
to the stationary motor for approximately 1 minute and some of the motor constants will be set automatically.
The remaining motor constants E2-02 (motor rated slip) and E2-03 (motor no-load current) will be set auto-
matically the first time operation is started in drive mode. To perform an operation immediately after station-
ary autotuning1, use the following procedure under the recommended conditions.
1. Check the values of E2-02 and E2-03 in verify mode or advanced programming mode.
2. Run the motor once in drive mode under the following conditions.
•
The Inverter and the motor are connected.
•
The motor shaft is not locked with a mechanical brake or other stopping mechanism (or function).
•
A motor-load ratio of 30 % or less is maintained.
•
A speed of 30 % or more of the base frequency set at E1-06 (default = highest frequency) is maintained at
a constant speed for one second or more.
3. After stopping the motor, check the values of E2-02 and E2-03 again in verify mode or advanced program-
ming mode. If the values of E2-02 and E2-03 differ from the ones before the first operation was carried
out, the settings have been successfully completed. Next, check if the values are suitable or not.
Tuning Mode
Multi-function Inputs
Multi-function Outputs
Rotational autotuning
Do not function.
Same as during normal
operation
Stationary autotuning 1
Do not function.
Maintain same status as
when autotuning is started.
Stationary autotuning for line-
to-line resistance only
Do not function.
Maintain same status as
when autotuning is started.
Stationary autotuning 2
Do not function.
Maintain same status as
when autotuning is started.
IMPORTANT
1. Always disconnect the motor from the machine and confirm that it is safe to operate the motor before
performing rotational autotuning.
2. If the motor cannot be operated by itself, perform stationary autotuning, but always use rotational
autotuning whenever it is possible to operate the motor by itself to increase performance.
