Autotuning - YASKAWA Varispeed E7 Instruction Manual And Parameter Description

Autotuning

Autotuning for Line-to-Line Resistance
Autotuning can be used to improve the performance when very long motor cables are used or when motor and
inverter have different power ratings.
To perform autotuning 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 line-to-line resistance and motor + cable resistance will be automatically measured
Power will be supplied to the motor during autotuning but the motor will not turn. Do not touch the motor
until autotuning has been completed.
IMPORTANT
Constant Settings for Autotuning
The following constants must be set before autotuning.
Table 4.1 Constant Settings before Autotuning
Con-
stant
Name
Num-
ber
Set the output power of the motor in
Motor out-
T1-02
put power
Kilowatts.
Set the rated current of the motor in
Motor rated
T1-04
current
Amps.
* 1. For a constant-output motor, set the value at the base speed.
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Display
*1
*1
Setting Factory
Range Setting
10% to 200%
Same as
of Inverter
Inverter
rated output
rated output
Same as
general-
10% to 200%
purpose
of Inverter
motor with
same
rated current
capacity as
Inverter
Trial Operation
7
4-