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6.3 Autotuning
6 -23
6.3.4 User Constants Related to Online Autotuning
This section provides information on a variety of user constants related to online autotuning.
J
J
Online Autotuning Method
The following user constant is used for setting the autotuning conditions.
Pn110.0
Online Autotuning Method
Factory
Setting:
0
Speed Control,
Position Control
Pn110.0 Setting
Description
0
Autotuning is performed only when the system runs for the first time after
the power is turned ON. After the load inertia is calculated, the calculated
data is not refreshed.
1
Autotuning is continuously performed (inertia value calculation).
2
The online autotuning function is not used.
This user constant is factory-set to “0”. If the load inertia change is minimal or if the application
makes few changes, there is no need to continue calculating the inertia while the system is in
operation. Instead, continueto usethe valuethat wascalculated whenthe systemwasfirststarted
up.
Set this user constant to “1” if the load inertia always fluctuates due to the load conditions. Then
the response characteristics can be kept stable by continuously refreshing the inertia calculation
data is refreshed continuously and reflecting them in the servo gain.
If the load inertia fluctuation results within 200 ms, the inertia calculation data may not be re-
freshed properly. If that happens, set Pn110.0 to “0” or “2.”
Set Pn110.0 to “2” if autotuning is not available or if the online autotuning function is not used
because the load inertia is already known and the Servopack is manually adjusted by setting the
inertia ratio data in Pn103.
J
J
Speed Feedback Compensation Selection
Usethefollowinguserconstant toenable ordisable speedfeedback compensation.Refer to
6.2.6
Speed Feedback Compensation
.
This user constant can be left as it is if online autotuning is performed. If this user constant is set
manually, however, thesetting isreflected tothe operationalsetting madeduring onlineautotun-
ing.
Pn110.1
Speed Feedback Compensation
Selection
Factory
Setting:
1
Speed Control,
Position Control
Pn110.1 Setting
Description
0
Enabled
1
Disabled
6
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