4
-8
Autotuning for Line-to-Line Resistance
Autotuning can be used to prevent control errors when the motor cable is long or the cable length has changed
or when the motor and Inverter have different capacities.
To perform autotuning set parameters T1-02 and T1-04 and then press the RUN Key on the Digital Operator.
The Inverter will supply power to the motor for approximately 20 seconds and the Motor Line-to-Line Resis-
tance (E2-05) and cable resistance will be automatically measured
Parameter Settings for Autotuning
The following parameters must be set before autotuning.
* 1. For a parameter-output motor, set the value at the base speed.
IMPORTANT
Power will be supplied to the motor when autotuning is performed even though the motor will not turn. Do
not touch the motor until autotuning has been completed.
Table 4.2 Parameter Settings before Autotuning
Param-
eter
Num-
ber
Name
Display
Setting
Range
Factory
Setting
T1-02
Motor out-
put power
Set the output power of the motor in
Kilowatts.
*1
10% to 200%
of Inverter
rated output
Same as
Inverter
rated output
T1-04
Motor rated
current
Set the rated current of the motor in
Amps.
*1
10% to 200%
of Inverter
rated current
Same as
general-
purpose
motor with
same
capacity as
Inverter