Mitsubishi Electric FR-A820-00046 Instruction Manual page 281

Parameters Speed control under Real sensorless vector control, vector control, PM sensorless vector control
Parameters set automatically by easy gain tuning
The following table shows the relationship between the easy gain tuning function and gain adjust-
ment parameters.
Pr. 880 Load inertia ratio
Pr. 820 Speed control P
gain 1
Pr. 821 Speed control
integral time 1
Pr. 828 Model speed
control gain
Pr. 422 Position control
gain
Pr. 446 Model position
control gain
Tab. 5-35:
NOTES If easy gain tuning is executed at an inertia equal to or higher than the specified value under vec-
tor control, a fault such as hunting may occur. Also, if the motor shaft is fixed by the servo lock or
position control, the bearing may be damaged. In this case, do not perform easy gain tuning.
Adjust the gain manually.
The load inertia ratio is only calculated under vector control.
FR-A800
0 1
a) The inertia calculation result (RAM) using
easy gain tuning is displayed.
b) The parameter is set at the following times.
Manual
input
c) Write (manual input) is available only
during a stop.
a) The tuning result (RAM) is displayed.
b) The parameter is set at the following times.
Every hour after turning ON the power
Manual
input
c) Write (manual input) is not available
Automatically set parameters by easy gain tuning
Easy gain tuning selection (Pr. 819) setting
Every hour after turning ON the power
When Pr. 819 is set to a value other than
"1"
After changing to a control other than
vector control (such as V/F control)
using Pr. 800
When Pr. 819 is set to a value other than
"1"
After changing to a control other than
vector control (such as V/F control)
using Pr. 800
2
Manual input
a) Gain is calculated when
Pr. 819 is set to "2", and the
result is set in the parameter.
b) When read, the tuning result
(parameter setting value) is
displayed.
c) Write (manual input) is not
available
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