n
Auto-Tuning Selection
V/f Rotational
Auto-Tuning
(T1-01 = 3)
Stationary Auto-Tuning
for Terminal Resistance Only
(T1-01 = 2)
Rotational
Auto-Tuning
(T1-01 = 0)
Select V/f Control
Mode (A1-02 = “0”)
for the drive.
Run the motor without the load.
Connect the load and run the motor.
Verify system operates as required.
Is the cable
between the motor
and drive longer
than 50 m?
YES
NO
NO
YES
NO
YES
YES
Auto-Tuning finished.
NOTICE: Auto-Tuning with
a connected load is possible,
but may result in less than
optimum performance.
Note: Manually set parameters
when OLV control is needed.
START
Select a V/f pattern
E1-03
Open Loop Vector
A1-02 = 2
Select the Motor Control Mode A1-02
Can the load be
disconnected from
the motor?
Will the application
allow motor rotation
for Auto-Tuning?
NO
PM Open Loop Vector Control
A1-02 = 5
Is the total
connected load
expected to be less
than 30% of the motor
rating?
V/f Control
A1-02 = 0
Figure 4.28 Auto-Tuning Selection
n
Before Auto-Tuning the Drive
Check the items below before Auto-Tuning the drive:
Basic Auto-Tuning Preparations
• Auto-Tuning automatically determines the electrical characteristics of the motor. This is fundamentally different from other types of Auto-Tuning
features used in servo systems.
• Before auto-tuning, be sure the input supply voltage equals or exceeds the motor rated voltage. Performance can be enhanced by using a motor with a
base voltage that is 20 V (40 V for 400 V class models) lower than the input supply voltage. This may be of special importance when operating the
motor above 90% of base speed, where high torque precision is required.
• Auto-Tuning is not possible with permanent magnet motors.
• To cancel Auto-Tuning, press the STOP key on the LED operator.
• The next table describes digital input and output terminal status during Auto-Tuning.
Auto-Tuning Type Digital Input Digital Output
Auto-Tuning for Energy Savings in V/f Control Not available Works the same during normal operation
Rotational-Type Auto-Tuning Not available Works the same during normal operation
Auto-Tuning for Resistance between Lines Not available Maintains the status at the start of Auto-Tuning
WARNING! When Auto-Tuning a motor that is used on an application in conjunction with a brake, take special precaution to insure the brake stays applied. Auto-Tuning activates
the drive multi-function outputs. Therefore, a brake may be released while the motor is uncoupled from the load, resulting in an unsafe condition. Proper precautions must therefore
be taken prior to performing Auto-Tuning.
Note: It is recommended that Rotational Auto-Tuning be performed with the load disconnected. Failure to comply could result in improper drive operation. If rotational Auto-Tuning
is performed for a motor coupled to a load, the motor constants will be inaccurate and the motor may exhibit abnormal operation. Disconnect or decouple the motor from the
load.
4.7 Test Run
92
YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)
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