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Speed control by Real sensorless
vector control, vector control
4
PARAMETERS
(4) Parameters automatically set by easy gain tuning
The following table indicates the relationship between easy gain tuning function and gain adjustment parameter.
Easy Gain Tuning Selection (Pr. 819 ) Setting
0 1 2
Load inertia ratio
(Pr. 880)
Manual input
a) Inertia estimation result (RAM) by
easy gain tuning is displayed.
b) Set the value in the following cases:
• Every hour after power-on
• When a value other than "1" is
set in Pr. 819
• When vector control is changed
to other control (V/F control etc.)
using Pr. 800
c) Write is enabled only during a stop
(manual input)
Manual input
Speed control P gain 1
(Pr. 820)
Speed control integral time 1
(Pr. 821)
Model speed control gain
(Pr. 828)
Position loop gain
(Pr. 422)
Manual input
a) Tuning result (RAM) is displayed. a) Gain is calculated when "2" is
set in Pr. 819 and the result is
set in the parameter.
b) Set the value in the following cases:
• Every hour after power-on
• When a value other than "1" is
set in Pr. 819
• When vector control is changed
to other control (V/F control etc.)
using Pr. 800
b) When the value is read, the
tuning result (parameter
setting value) is displayed.
c) Write (manual input) disabled c) Write (manual input) disabled
CAUTION
· Performing easy gain tuning with larger inertia than the specified value during vector control may cause malfunction such as
hunting. In addition, when the motor shaft is fixed with servo lock or position control, bearing may be damaged. To prevent these,
make gain adjustment by manual input without performing easy gain tuning.