E6581301
F-40
6
(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 (RV = , , , or ).
There are two parameters (H and H described below) for auto tuning. F or the steps to be followed
when setting these parameters, see the flowchart on the previous page. This secti on provides an explanation of
H and H.
[Parameter setting]
Title Function Adjustment range Default setting
H Auto-tuning 1
:No auto-tuning
:Initialize motor constant ( after execution)
:Continue operation continued after auto-tuning
( after execution)
:Auto-tuning by input terminal signal( after execution)
:Motor constant auto calculation ( after execution)
H=: Resets H (motor constant 1), H (motor constant 2), H (motor constant 3) and
H (motor constant 4) to their factory default settings (constant of a Toshiba standard four-pole
motor with the same capacity as the inverter).
H=: Makes the inverter tune the motor con stant, 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.
H=: Makes the inverter only tune the motor constant, unlike H=. Connect the motor to th e inverter
in advance when selecting this setting.
This function operates when "ST" signal and "Auto-tuning" signal became a ctive.
(Use this setting if the machine cannot be started as-is after tuning for some reason on the part of the
machine.)
H=: If you select this setting after enteri ng the information indicated on the motor namepla te (XN(base
frequency), XNX (base frequency voltage), H (rated current of motor), H ( rated speed of
rotation of motor)), the inverter will calculate the motor constant and set the parameters H
through H automatically.
There is no need to connect the motor when making this setting.
[Parameter setting]
Title Function Adjustment range Default setting
H Auto-tuning 2
:Disabled
:Self-cooled motor
:Forced-air-cooled motor
Auto-tuning 2 refers to the function of adjusting the motor constant automati cally, while estimating the increase in
the motor temperature.
If your inverter is equipped with a self-cooling fan (fan connected dir ectly to the motor shaft), set H to .
When using a motor with a cooling fan (forced air-cooling type), set H to .
• Perform auto-tuning 2 along with auto-tuning 1.
• Perform auto-tuning when the motor is cold (temperature equal to the a mbient temperature).
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$Precautions on auto-tuning 1
(1) The inverter is tuned automatically (auto-tuning 1 H=) when the inverte r is started for the first
time after setup. During auto-tuning 1, which takes about 3 minutes from sever al 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 (H=) only after the motor has been connected a nd 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 into 3 minutes from several seconds as each model. If an error
occurs, however, the inverter trips (display GVP) and no motor constant is set. For th ese motors,
perform manual tuning using (2) described below.
(4) It may not be possible to tune automatically special motors such as hi gh-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 mechan ical braking. Without
sufficient circuit protection, the result of insufficient motor torque during tu ning could create the risk of
the machine stalling/failing.
(6) If auto-tuning is impossible or an auto-tuning error (GVP) is displ ayed, perform manual tuning with
(2) described below.
$Precautions on vector control
Refer to Section 5.6,9).