4.6 Auto-Tuning
YASKAWA ELECTRIC EZZ010928 FSDrive-MV1000 Instructions 95
Start-Up Programming
& Operation
4
◆ Before Auto-Tuning the Drive
Check the items below before Auto-Tuning the drive.
■
Basic Auto-Tuning Preparations
• The Auto-Tuning provides the function to automatically check the motor’s electrical parameters. It is basically
different from the Auto-Tuning provided by the servo system (function to check the amount of load).
• 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.
Note: For best performance, the drive input supply voltage must be greater than the motor rated voltage.
• To cancel Auto-Tuning, press on the digital operator.
• Table 4.8 shows the sequence input and output terminal operation while Auto-Tuning is being executed.
Table 4.8 Sequence Input and Output Operation During Auto-Tuning
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.
Note: To run the Rotational Auto-Tuning, be sure to disconnect the motor from the machine and check to see that there is nothing
dangerous even if the motor starts to turn around. It could result in a failure of the drive. When the rotational Auto-Tuning is
performed for load-connected motor, the motor parameter could not be calculated accurately and the motor could run unusually.
■ 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.
◆ Auto-Tuning Interruption and Fault Codes
If tuning results are abnormal or is pressed before completion, Auto-Tuning will be interrupted and a fault code
will appear on the digital operator.
Figure 4.11
Figure 4.11 Auto-Tuning Aborted Display
Tuning Mode Sequence Input Function Sequence Output Function
Rotational Auto-Tuning Disabled
Functions the same as during normal
operation
Stationary Auto-Tuning for Line-to-
Line Resistance
Disabled
Maintains the status at the start of Auto-
Tuning
DIGITAL OPERATOR JVOP-180
DIGITAL OPERATOR JVOP-180
REV DRV FOUT
DRV
ALARM
ALARM
A – During the Auto-Tuning B – Auto-Tuning Aborted
- A.TUNE -
X.XX Hz/ X.XA
DRV
Tune-Proceeding
Rdy
FWD
- MODE -
Er-12
I-det.Circuit
DRV
FWD
RESET
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