5.3 Advanced Autotuning (Fn201)
5-21
5
Adjustments
(2) Failure in Operation
This section describes the causes and corrective actions in case the operation has not been successfully com-
pleted.
If “NO-OP” is shown
If “Errors” is shown
Errors during Calculation of Mass Ratio
The following table shows the probable causes of errors that may occur during the calculation of the mass
ratio with the Jcalc set to ON, along with corrective actions for the errors.
Probable Cause
Corrective Actions
The main circuit power supply was OFF.
Turn ON the main circuit power supply.
An alarm or warning occurred.
Remove the cause of the alarm or the warning.
Overtraveling occurred.
Remove the cause of the overtravel.
Gain setting 2 was selected by gain switching.
Turn OFF the automatic gain switching.
The HWBB function operated.
Cancel the HWBB function.
Error
Probable Cause
Corrective Actions
The gain adjustment was
not successfully
completed.
• Machine vibration is occurring or the
positioning completed signal (/COIN) is
repeatedly turning ON and OFF.
• Increase the set value for Pn522.
• Change the mode from 2 to 3.
• If machine vibration occurs, suppress the
vibration with the anti-resonance control
adjustment function and the vibration
suppression function.
An error occurred during
the calculation of the
mass ratio.
Refer to the following table
Errors during Calculation of Mass Ratio
.
Travel distance setting
error
The travel distance is set to approximately 5
mm or less, which is less than the minimum
adjustable travel distance.
Increase the travel distance. It is recom-
mended to set the travel distance to around
90 mm.
The positioning
completed signal (/COIN)
did not turn ON within
approximately 10 seconds
after positioning
adjustment was
completed.
The positioning completed width is too nar-
row or the proportional control (P control)
is being used.
• Increase the set value for Pn522.
• If P control is used, turn OFF the /P-CON
signal.
A setting error occurred in
the mass ratio calculation
when the tuning-less
function was activated.
When the tuning-less function was
activated, Jcalc was set to OFF, so the mass
ratio was not calculated.
• Turn OFF the tuning-less function.
• Set Jcalc to ON
,
so the mass ratio will be
calculated.
Error
Display
Cause
Corrective Action
Err1
The SERVOPACK started calculating the mass
ratio, but the calculation was not completed.
• Increase the speed loop gain (Pn100).
• Increase the STROKE (travel distance).
Err2
The mass ratio fluctuated greatly and did not
converge within 10 tries.
Set the calculation value based on the machine specifi-
cations in Pn103 and execute the calculation with the
Jcalc set to OFF.
Err3
Low-frequency vibration was detected.
Double the mass calculating start level (Pn324).
Err4
The force limit was reached.
• Increase the force limit value.
• Double the mass calculating start level (Pn324).
Err5
While calculating the mass ratio, the speed con-
trol was set to proportional control with P-CON
input.
Operate the SERVOPACK with PI control while calcu-
lating the mass ratio.
