Mitsubishi Electric FR-A820-00046 Instruction Manual page 308

Speed control under Real sensorless vector control, vector control, PM sensorless vector control
Execution procedure for easy gain tuning (Pr. 819 = "2" Load inertia ratio manual input)
Easy gain tuning (load inertia ratio manual input) is valid in the speed control mode under Real sen-
sorless vector control, the speed control and position control modes under vector control, and the
speed control mode under PM sensorless vector control.
Set the load inertia ratio for the motor in Pr. 880 "Load inertia ratio".
Set "2" (easy gain tuning enabled) in Pr. 819 "Easy gain tuning selection". When set, Pr. 820 "Speed
control P gain 1" and Pr. 821 "Speed control integral time 1" are set automatically.
Operation is performed with the adjusted gain from the next operation.
Perform a test run, and set the response level in Pr. 818 "Easy gain tuning response level setting".
Setting this parameter higher improves the trackability for commands, but setting it too high
causes vibration. (The response level can be adjusted during operation when Pr. 77 "Parameter
write selection" = "2" (parameters can be written during operation).)
NOTES When Pr. 819 = "1, 2" is set, even if the Pr. 819 setting value is returned to "0" after tuning is per-
formed, the data that was set in each parameter is retained in the tuning results.
If good precision cannot be obtained even after executing easy gain tuning, because of external
disturbances or other reasons, perform fine adjustment manually. At this time, set the setting
value of Pr. 819 to "0" (no easy gain tuning).
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Parameters