Mitsubishi Electric FR-A700 Technical Manual page 285

(1) Position control is not performed correctly
Position control is not
performed correctly
Have you checked
the speed control items?
Position shift occurs.
Motor or machine is
Machine operation is
Please contact your sales
representative.
N
Check the speed
Y
control measures.
Y
Have you made
N
the electronic gear
setting?
The forward (reverse)
rotation stroke end signal has
turned OFF before completion
of positioning.
Y
hunting.
N
[Pr. 422 Position loop
gain] is high.
Decrease
[Pr. 422 Position loop
gain].
Y
unstable.
Insufficient torque.
Increase [Pr. 854
N
Excitation ratio].
Speed command under
position control is affected by
the speed control.
N
Set the electronic gear.
Y
([Pr. 420, 421])
Y
Do not turn OFF the forward
(reverse) rotation stroke end
N
signal before completion of
positioning.
N
Y
Perform easy gain tuning.
The speed control gain is high.
Decrease [Pr. 820 Speed control
P gain 1].
Increase [Pr. 821 Speed control
integral time 1].
319
PARAMETER
2