YASKAWA V1000 Series Technical Manual page 92

4.7 Test Run
Auto-Tuning Selection
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Before Auto-Tuning the Drive
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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
Auto-Tuning for Energy Savings in V/f Control
Rotational-Type Auto-Tuning
Auto-Tuning for Resistance between Lines
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.
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START
Select the Motor Control Mode A1-02
V/f Control Open Loop Vector
A1-02 = 0 A1-02 = 2
Select a V/f pattern
E1-03
Can the load be
Will the application
disconnected from
allow motor rotation
the motor?
for Auto-Tuning?
NO
YES
YES
Is the cable
between the motor
and drive longer
than 50 m?
V/f Rotational
YES
NO
Auto-Tuning
(T1-01 = 3)
Auto-Tuning
Stationary Auto-Tuning
(T1-01 = 0)
for Terminal Resistance Only
(T1-01 = 2)
Run the motor without the load.
Connect the load and run the motor.
Verify system operates as required.
Auto-Tuning finished.
Figure 4.28 Auto-Tuning Selection
Digital Input
Not available
Not available
Not available
YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)
PM Open Loop Vector Control
A1-02 = 5
NO
Is the total
connected load
expected to be less
than 30% of the motor
rating?
YES
NO
NOTICE: Auto-Tuning with
a connected load is possible,
but may result in less than
optimum performance.
Rotational
Select V/f Control
Mode (A1-02 = "0")
for the drive.
Note: Manually set parameters
when OLV control is needed.
Works the same during normal operation
Works the same during normal operation
Maintains the status at the start of Auto-Tuning
Digital Output