Mitsubishi Electric FR-A800 Series Instruction Manual page 331

 Flowchart
NOTE
• The speed command of position control is related to speed control. (Refer to
330
5. PARAMETERS
5.5 Position control under vector control and PM sensorless vector control
Downloaded from ManualsNet.com
Position control is not
exercised normally
Have you checked
the speed control items?
Y
Position shift occurs.
N
rotation stroke end signal has
turned off before completion
Motor or machine is
hunting.
N
Machine operation is
unstable.
N
Please contact your sales
representative.
search engine
N
Check the speed
control measures.
Y
Have you made
N
the electronic gear
setting?
Set the electronic gear.
Y
(Pr. 420, Pr. 421)
The forward (reverse)
Y
of positioning.
Do not turn off the forward
(reverse) rotation stroke end
signal before completion of
N
positioning.
Y
N
The position loop gain
(Pr. 422) is high.
Y
Perform easy gain tuning.
The speed control gain is high.
Decrease the speed control
Decrease
proportional gain (Pr. 820).
the position loop gain
Increase the speed control
(Pr. 422).
integral time (Pr. 821).
Y
Insufficient torque.
Increase the excitation
ratio (Pr. 854).
page 235.)