Mitsubishi Electric FR-A700 Instruction Manual page 237

Pr. 399 Orientation deceleration ratio (initial value is 20)
• Make adjustments as shown below according to the orientation status.
(Refer to the Pr. 396 and Pr. 397 details also.)
Generally adjust Pr. 362 in the range from 5 to 20, and Pr. 399 from 5 to 50.
Phenomenon
Rocking occurs during
stopping
The orientation time is long
Hunting occurs when
stopping
The servo rigidity during
stopping is low
CAUTION
Or, if the motor does forward/reverse reciprocation operation
installation direction may be incorrect. Review Pr. 393 Orientation selection (refer to page 218) and Pr. 359 Encoder rotation direction
(refer to page 217).
Pr. 351 Orientation speed (initial value: 2Hz)
• Set the speed when switching beween the speed control mode and the position control mode is performed under
orientation operation.
Decreasing the set speed enables stable orientation stop. Note that the orientation time will increase.
[Hz]
Frequency
Pr.351 Orientation speed
Orientation start
(X22)
Orientation completion
(ORA)
Encoder Z phase pulse
REMARKS
When "19" is set in Pr. 52 DU/PU main display data selection , position pulse monitor is displayed instead of PU output voltage
monitor.
Adjustment Procedure
Pr. 396 Pr. 397 Pr. 362
3) 3) 2)
2)
2) 2) 1)
1) 1) 2)
ON
OFF
Motor brake and stop operation
REMARKS
Pr. 399
1. :Increase the parameter setting value.
1)
:Do not change the parameter setting
value.
1)
:Decrease the parameter setting value.
2. The numbers 1) , 2) and 3) in the table show
the order of priority for changing the
parameters setting value.
, the parameter setting value for the orientation detector
Decelerate according to the deceleration ratio of Pr. 399
Orientation command completion
Time[t]
ON
4
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