Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 315

 Flowchart
NOTE
• The speed command of position control is related to speed control. (Refer to
314
5. PARAMETERS
5.5 Position control under vector control and PM sensorless vector control
Position control is not
exercised normally
N
Have you checked
the speed control items?
Y
Y
Position shift occurs.
N
the electronic gear
The forward (reverse)
rotation stroke end signal has
turned off before completion
Y
Motor or machine is
hunting.
N
The position loop gain
Decrease
the position loop gain
(Pr. 422).
Y
Machine operation is
unstable.
Insufficient torque.
Increase the excitation
N
ratio (Pr. 854).
Please contact your sales
representative.
Check the speed
control measures.
Have you made
N
setting?
Set the electronic gear.
Y
(Pr. 420, Pr. 421)
Y
of positioning.
Do not turn off the forward
(reverse) rotation stroke end
signal before completion of
N
positioning.
N
(Pr. 422) is high.
Y
Perform easy gain tuning.
The speed control gain is high.
Decrease the speed control
proportional gain (Pr. 820).
Increase the speed control
integral time (Pr. 821).
page 229.)