YASKAWA A1000 Technical Manual

4.7 Auto-Tuning
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual 123
Start-Up Programming & Operation
4
 Before Auto-Tuning the Drive
Check the items below before Auto-Tuning the drive.

Basic Auto-Tuning Preparations
• Auto-Tuning requires the user to input data from the motor nameplate or motor test report. Make sure this data is
available before Auto-Tuning the drive.
• For best performance, the drive input supply voltage must
be greater than the motor rated voltage.
Note: Better performance is possible when using a motor with a base voltage that is 20 V (200 V class models) or 40V (400 V class
models) lower than the input supply voltage. This is particularly important when operating the motor above 90% of base speed,
where high torque precision is required.
• To cancel Auto-Tuning, press the STOP key on the digital operator.
• When using a motor contactor, make sure it is closed throughout the Auto-Tuning process.
• When using Auto-Tuning for motor 2, make sure motor 2 is connected
to the drive output when performing the tuning.
• Table 4.27 describes digital input and output terminal operation while
Auto-Tuning is performed.
Table 4.27 Digital Input and Output Operation During Auto-Tuning
 Notes on Rotational Auto-Tuning
• To achieve optimal performance from Rotational Auto-Tuning, the load should be decoupled from the motor.
Rotational Auto-Tuning is best suited for applications requiring high performance over a wide speed range.
• If motor and load can not be decoupled, reduce the load so that it is no greater than 30% of
the rated load. Performing
Rotational Auto-Tuning with a higher load will set motor parameters incorrectly, and can cause irregular motor
rotation.
• Ensure the motor-mounted brake is fully
released if installed.
• Connected machinery should be allowed to rotate the motor.
NOTICE: Make sure that the motor and the load are not connected when performing Auto-Tuning. Failure to comply may cause
damage to equipment or injury to personnel.
NOTICE: Electrical Shock Hazard. When executing Auto-Tuning, voltage is applied to the motor even before it rotates. Do not touch
the motor until Auto-Tuning is completed. Failure to comply may result in injury from electrical shock. If PM Rotational Auto-Tuning is
performed, the motor will remain stopped for approximately one minute with power applied and then the motor will rotate for one
minute.
 Notes on Stationary Auto-Tuning
Stationary Auto-Tuning modes analyze motor characteristics by injecting current into the motor for about one minute.
WARNING! Electrical Shock Hazard. When executing Stationary Auto-Tuning, voltage is applied to the motor even before it rotates.
Do not touch the motor until Auto-Tuning is completed. Failure to comply may result in injury from electrical shock.
WARNING! Sudden Movement Hazard. If installed, do not release the mechanical brake during stationary Auto-Tuning. Inadvertent
brake release may cause damage to equipment or injury to personnel. Ensure that the mechanical brake release circuit is not
controlled by the drive multi-function digital outputs.
Motor Type Auto-Tuning Type Digital Input Digital Output
IM Motor
Rotational Auto-Tuning
Digital input functions are disabled.
Functions the same as during normal operation
Stationary Auto-Tuning 1
Maintains the status at the start of Auto-Tuning
Stationary Auto-Tuning 2
Stationary Auto-Tuning for Line-to-Line Resistance
Rotational Auto-Tuning for V/f Control Functions the same as during normal operation
Stationary Auto-Tuning 3 Maintains the status at the start of Auto-Tuning
PM Motor
PM Motor Parameter Settings Digital output functions are disabled.
PM Stationary Auto-Tuning
Maintains the status at the start of Auto-Tuning
PM Stationary Auto-Tuning for Stator Resistance
Z Pulse Offset Tuning
Back EMF Constant Tuning Functions the same as during normal operation
High Frequency Injection Parameter Tuning Digital output functions are disabled.
PM Rotational Auto-Tuning Functions the same as during normal operation
IM and PM
Motors
Inertia Tuning
Functions the same as during normal operation
ASR Gain Auto-Tuning

YASKAWA A1000 Specifications

General

Type	AC Drive
Series	A1000
Input Voltage	200-240V, 380-480V
Frequency Range	0-400 Hz
Horsepower Range	0.5 to 1000 HP
Power Range	0.4 to 630 kW
Control Method	V/f Control
Overload Capacity	150% for 60 seconds
Braking	Dynamic Braking
Communication	Modbus
Safety	Safe Torque Off (STO)
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overheat
Operating Temperature	-10 to +50°C
Storage Temperature	-20 to 60°C
Humidity	5 to 95% RH (non-condensing)
Enclosure	IP20