YASKAWA Sigma-V Series User Manual page 117

(7) Errors during Calculation of Load Moment of Inertia Ratio/Mass Ratio
and Corrective Actions
The following table shows the probable causes of errors that may occur during
the calculation of the load moment of inertia ratio with the MODE set to 0,
along with corrective actions for the errors.
Error
Error Type
Display
Failure in
starting cal-
Err1 culation of
moment of
inertia
Failure in
calculation
Err2
of moment
of inertia
Low-fre-
quency
Err3
vibration
error
Torque limit
Err4
error
Proportional
Err5
control error
3.3 Operation Method for Each Utility Function
Cause
The SERVOPACK started cal-
culating the moment of inertia,
but the calculation was not
completed.
The moment of inertia fluctu-
ated greatly and did not con-
verge within 10 tries.
Low-frequency vibration was
detected.
The torque limit was reached.
While calculating the moment
of inertia, the speed control
was set to proportional control
with P-CON input.
Corrective Action
• Increase the speed loop gain
(Pn100).
• Increase the STROKE
(travel distance).
Set the calculation value based
on the machine specifications
in Pn103 and execute the cal-
culation with the MODE set to
1.
Double the calculation starting
level of the moment of inertia
(Pn324).
• Increase the torque limit
value.
• Double the calculation start-
ing level of the moment of
inertia (Pn324).
Operate the SERVOPACK
with PI control while calculat-
ing the moment of inertia.
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