YASKAWA JUSP-OP05A-1-E User Manual page 99

When "Error" Flashes on the Display
Error
The gain adjustment
was not successfully
completed.
An error occurred
during the calculation
of the moment of
inertia.
Travel distance setting
error
The positioning
completed signal
(/COIN) did not turn ON
within approximately 10
seconds after
positioning adjustment
was completed.
The moment of inertia
cannot be calculated
when the tuning-less
function was activated.
When An Error Occurs during Calculation of Moment of Inertia
The following table shows the probable causes of errors that may occur during the
calculation of the moment of inertia with the Jcalc set to ON, along with corrective
actions for the errors.
Error
Probable Cause
Display
The SERVOPACK started calculating
Err1 the moment of inertia, but the calcula-
tion was not completed.
The moment of inertia fluctuated greatly
Err2
and did not converge within 10 tries.
Err3 Low-frequency vibration was detected.
Probable Cause
Machine vibration is occur-
ring or the positioning com-
pleted signal (/COIN) is
turning ON and OFF when
the servomotor is stopped.
Refer to the following table
culation of Moment of Inertia.
The travel distance is set to
approximately 0.5 rotation
(0.05 rotation for SGMCS
servomotor) or less, which
is less than the minimum
adjustable travel distance.
The positioning completed
width is too narrow or pro-
portional control (P control)
is being used.
When the tuning-less func-
tion was activated, Jcalc was
set to OFF so the moment of
inertia was not calculated.
3.2 Operations
Corrective Actions
• 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 adjust-
ment function and the vibration
suppression function.
When An Error Occurs during Cal-
Increase the travel distance. It is
recommended to set the number of
motor rotations to around 3.
• Increase the set value for Pn522.
• Set V_PPI in the Option field to
0.
• Turn OFF the tuning-less func-
tion.
• Set Jcalc to ON, so the moment
of inertia will be calculated.
Corrective Actions
• Increase the speed loop gain (Pn100).
• Increase the STROKE (travel dis-
tance).
Set the calculation value based on the
machine specifications in Pn103 and
execute the calculation with the Jcalc set
to OFF.
Double the set value of the moment of
inertia calculating start level (Pn324).
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