Toshiba VF-PS1 Instruction Manual page 149

(1) Setting auto-tuning
This auto tuning function allows you to set the motor constant easily, which needs to be set when operating in auto
torque boost mode or vector control mode ( = ,  or ).
There are two parameters ( and  described below) for auto tuning. For the steps to be followed when
setting these parameters, see the flowchart on the previous page. This section provides an explanation of 
and .
[Parameter setting]
Title Function
Auto-tuning 1

=: Resets  (motor constant 1),  (motor constant 2),  (motor constant 3) and
 (motor constant 4) to their factory default settings (constant of a Toshiba standard four-pole
motor with the same capacity as the inverter).
=: Makes the inverter tune the motor constant, considering how the motor is connected, when it is started
for the first time after this setting is made. Connect the motor to the inverter in advance when selecting
this setting.
=: Makes the inverter only tune the motor constant, unlike =. Connect the motor to the inverter
in advance when selecting this setting.
(Use this setting if the machine cannot be started as-is after tuning for some reason on the part of the
machine.)
=: If you select this setting after entering the information indicated on the motor nameplate ((base
frequency),  (base frequency voltage),  (rated current of motor),  (rated speed of
rotation of motor)), the inverter will calculate the motor constant and set the parameters 
through  automatically.
There is no need to connect the motor when making this setting.
[Parameter setting]
Title Function
Cooled

Cooled refers to the function of adjusting the motor constant automatically, while estimating the increase in the
motor temperature.
If your inverter is equipped with a self-cooling fan (fan connected directly to the motor shaft), set  to . When
using a motor with a cooling fan (forced air-cooling type), set  to .
• Perform Cooled along with auto-tuning 1.
• Perform auto-tuning when the motor is cold (temperature equal to the ambient temperature).
Precautions on auto-tuning 1
(1) The inverter is tuned automatically (auto-tuning 1 =) when the inverter is started for the first
time after setup. During auto-tuning 1, which takes several seconds, the motor is energized, although
it is standing still. Noise may be produced by the motor during auto-tuning 1, which, however, does not
indicate that something is wrong with the inverter or the motor.
(2) Conduct auto-tuning 1 (=) only after the motor has been connected and operation
completely stopped.
If auto-tuning is conducted immediately after operation stops, the presence of a residual voltage may
result in abnormal tuning.
(3) Usually, auto-tuning terminates in some seconds. If an error occurs, however, the inverter trips
(display ) and no motor constant is set. For these motors, perform manual tuning using (2)
described below.
(4) It may not be possible to tune automatically special motors such as high-speed motor or high-slip
motor. For these motors, perform manual tuning using (2) described below.
(5) Provide cranes and hoists with sufficient circuit protection such as mechanical braking. Without
sufficient circuit protection, the result of insufficient motor torque during tuning could create the risk of
the machine stalling/failing.
(6) If auto-tuning is impossible or an auto-tuning error () is displayed, perform manual tuning with (2)
described below.
Precautions on vector control
Adjustment range
:No auto-tuning
:Initialize motor constant ( after execution)
:Continue operation continued after auto-tuning
( after execution)
:Auto-tuning by input terminal signal
:Motor constant auto calculation ( after execution)
Adjustment range
:Disabled
:Self-cooled motor
:Forced-air-cooled motor
⇒
Refer to Section 5.6,10).
F-37
E6581386
Default setting

6
Default setting
