5.5 Auto-Tuning Fault Detection
Auto-Tuning faults in this section are displayed on the digital operator and will cause the motor to coast to a stop. Auto-Tuning
faults do not trigger a multi-function digital output set for fault or alarm output.
An Endo error on the digital operator display indicates Auto-Tuning has successfully completed with discrepancies in the
calculations. Check the cause of the Endo error using the tables in this section and perform Auto-Tuning again after fixing
the cause.
The drive may be used in the application if no cause can be identified despite the existence of an Endo error.
An Ero error indicates that Auto-Tuning has not completed successfully. Check for the cause of the error using the tables in
this section, and perform Auto-Tuning again after fixing the cause.
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Auto-Tuning Codes, Causes, and Possible Solutions
Table 5.5 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.
• Prior to Auto-Tuning, verify the information on the motor nameplate.
• Enter proper values from motor nameplate to parameters T1-02 and T1-04 and repeat Auto-Tuning.
• If possible, disconnect the motor from the load and perform Auto-Tuning. If the load cannot be uncoupled,
use the current Auto-Tuning results.
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 coefficients (E2-07 and
E2-08) to temporary values.
• 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
motor 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 calculated slip is outside the allowable
range.
• Make sure the data entered for Auto-Tuning is correct.
• If possible, perform Rotational Auto-Tuning. If not possible, perform Stationary Auto-Tuning 2.
Digital Operator Display Error Name
End5 Resistance Tuning Error
Cause Possible Solutions
The calculated resistance value is outside
the allowable range.
• Double-check the data 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 calculated leakage inductance value is
outside the allowable range.
Double-check the data entered for the Auto-Tuning process.
5.5 Auto-Tuning Fault Detection
150
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