6.7 Auto-Tuning Fault Detection
When the Auto-Tuning faults shown below are detected, the fault is displayed on the digital operator and the motor coasts to
a stop. Auto-Tuning faults do not trigger a multi-function terminal set for fault or alarm output.
An Endo error indicates that although Auto-Tuning has successfully completed, there is some discrepancy in the calculations.
If an Endo error occurs, check for the cause of the error using the table below, and perform Auto-Tuning again after fixing
the problem. Start the application if no problem can be diagnosed despite the existence of the Endo error.
u
Auto-Tuning Codes, Causes, and Possible Solutions
Table 6.17 Auto-Tuning Codes, Causes, and Possible Solutions
Digital Operator Display Error Name
End1
Excessive V/f Setting (detected only during Rotational Auto-Tuning, and displayed after Auto-Tuning is
complete)
Cause Possible Solutions
The torque reference exceeded 20% during
Auto-Tuning.
• Before Auto-Tuning the drive, verify the information written on the motor nameplate and enter that data
to T1-03 through T1-05.
• Enter proper information to parameters T1-03 to T1-05 and repeat Auto-Tuning.
• If possible, disconnect the motor from the load and perform Auto-Tuning. If the load cannot be uncoupled,
simply use the Auto-Tuning results as they are.
The results from Auto-Tuning the no-load
current exceeded 80%.
Digital Operator Display Error Name
End2
Motor Iron-Core Saturation Coefficient (detected only during Rotational Auto-Tuning and displayed after
Auto-Tuning is complete)
Cause Possible Solutions
Motor data entered during Auto-Tuning
was incorrect.
• Make sure the data entered to the T1 parameters match the information written on the motor nameplate.
• Restart Auto-Tuning and enter the correct information.
Results from Auto-Tuning are outside the
parameter setting range, assigning the iron-
core saturation coefficient (E2-07, E2-08)
a temporary value.
• Check and correct faulty motor wiring.
• Disconnect the motor from machine and perform Rotational Auto-Tuning.
Digital Operator Display Error Name
End3 Rated Current Setting Alarm (displayed after Auto-Tuning is complete)
Cause Possible Solutions
The correct current rating printed on the
nameplate was not entered into T1-04.
• Check the setting of parameter T1-04.
• Check the motor data and repeat Auto-Tuning.
Digital Operator Display Error Name
End4 Adjusted Slip Calculation Error
Cause Possible Solutions
The slip that was calculated is outside the
allowable range.
• Make sure the data entered for Auto-Tuning is correct.
• Execute Rotational Auto-Tuning instead. If not possible, try Stationary Auto-Tuning 2.
Digital Operator Display Error Name
End5 Resistance Tuning Error
Cause Possible Solutions
The resistance value that was calculated is
outside the allowable range.
• Double check the data that was entered for the Auto-Tuning process.
• Check the motor and motor cable connection for faults.
Digital Operator Display Error Name
End6 Leakage Inductance Alarm
Cause Possible Solutions
The leakage inductance value that was
calculated is outside the allowable range.
Double check the data that was entered for the Auto-Tuning process.
Digital Operator Display Error Name
End7 No-Load Current Alarm
Cause Possible Solutions
The entered no-load current value was
outside the allowable range.
Check and correct faulty motor wiring.
6.7 Auto-Tuning Fault Detection
328
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
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