Mitsubishi Electric FR-A800, Instruction Manual

Page: 364 / 1042

Position control under vector control and PM sensorless vector control Parameters
5 - 184
Flowcharts
I002547E
Fig. 5-73: Troubleshooting for when position control is not exercised normally
NOTE The speed command of position control is related to speed control. (Refer to page 5-76.)
Position control is not
exercised normally
Have you checked
the speed control items?
Position shift occurs.
Check the speed
control measures.
Have you made
the electronic gear
setting?
The forward (reverse)
rotation stroke end signal has
turned off before completion
of positioning.
Motor or machine is
hunting.
The position
control gain
(Pr. 422) is high.
Decrease the position
control gain
(Pr. 422).
Insufficient torque.
Increase the excitation
ratio (Pr. 854).
Please contact your sales
representative.
Machine operation is
unstable.
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).
Do not turn off the forward
(reverse) rotation stroke end
signal before completion of
positioning.
Set the electronic gear.
(Pr. 420, Pr. 421)
N
N
N
N
N
N
N
Y
Y
Y
Y
Y
Y
Y