Yaskawa Sigma-5 User Manual: Operation of Digital Operator - Manual (Page 99)

3.2 Operations
3-65
9
head1
3
Utility Function Mode
„ When “Error” Flashes on the Display
„ 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 Corrective Actions
The gain adjustment
was not successfully
completed.
Machine vibration is occur-
ring or the positioning com-
pleted signal (/COIN) is
turning ON and OFF when
the servomotor is stopped.
• 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.
An error occurred
during the calculation
of the moment of
inertia.
Refer to the following table „ When An Error Occurs during Cal-
culation of Moment of Inertia.
Travel distance setting
error
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.
Increase the travel distance. It is
recommended to set the number of
motor rotations to around 3.
The positioning
completed signal
(/COIN) did not turn ON
within approximately 10
seconds after
positioning adjustment
was completed.
The positioning completed
width is too narrow or pro-
portional control (P control)
is being used.
• Increase the set value for Pn522.
• Set V_PPI in the Option field to
0.
The moment of inertia
cannot be calculated
when the tuning-less
function was activated.
When the tuning-less func-
tion was activated, Jcalc was
set to OFF so the moment of
inertia was not calculated.
• Turn OFF the tuning-less func-
tion.
• Set Jcalc to ON, so the moment
of inertia will be calculated.
Error
Display
Probable Cause Corrective Actions
Err1
The SERVOPACK started calculating
the moment of inertia, but the calcula-
tion was not completed.
• Increase the speed loop gain (Pn100).
• Increase the STROKE (travel dis-
tance).
Err2
The moment of inertia fluctuated greatly
and did not converge within 10 tries.
Set the calculation value based on the
machine specifications in Pn103 and
execute the calculation with the Jcalc set
to OFF.
Err3 Low-frequency vibration was detected.
Double the set value of the moment of
inertia calculating start level (Pn324).