Mitsubishi Electric FR-A700 Instruction Manual page 116

Speed control by real sensorless vector
control, vector control
(4) Parameters automatically set by easy gain tuning
The following table indicates the relationship between easy gain tuning function and gain adjustment parameter.
Load inertia ratio
(Pr. 880)
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)
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.
106
Easy Gain Tuning Selection (Pr. 819 ) Setting
0
a) Inertia estimation result (RAM) by
easy gain tuning is dispayed.
b) Set the value in the following cases:
• Every hour after power-on
• When a value other than "1" is
Manual input 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)
a) Tuning result (RAM) is displayed.
b) Set the value in the following cases:
• Every hour after power-on
Manual input • 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 (manual input) disabled
1
Manual input
a) Gain is calculated when "2" is
set in Pr. 819 and the result is
set in the parameter.
b) When the value is read, the
tuning result (parameter
setting value) is displayed.
c) Write (manual input) disabled
2