Trouble Shooting For When Position Control Is Not Exercised Normally - Mitsubishi Electric FR-A700 Instruction Manual

Parameter
6.5.7

Trouble shooting for when position control is not exercised normally

Fig. 6-43: Trouble shooting for when position control is not exercised normally
NOTE The speed command of position control relates to speed control. (Refer to section 6.3.1).
FR-A700 EC
Position control is
not exercised normally
Have you
N
checked the
speed control
items?
Y
Y
Position shift occurs.
N
Motor or
Y
machine is
hunting.
N
Machine
Y
operation
is unstable.
N
Please contact your sales
representative.
Check the speed
control measures.
Have you
N
made the
electronic
gear setting?
Y
The
forward (reverse)
Y
rotation stroke end signal
has turned off before
completion of
positioning.
Do not turn off the forward (reverse)
N
The position
N
loop gain
(Pr. 422)
is high.
Y
Decrease the position
loop gain (Pr. 422).
Insufficient torque.
Increase the excitation
ratio (Pr. 854).
Position control by vector control
Set the electronic gear.
(Pr. 420, Pr. 421)
rotation stroke end signal before
completion of positioning..
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).
Vector Vector Vector
I001542E
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