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Mitsubishi Electric QD77MS User Manual Page 75

Simple motion module.
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[Pr.328] Synchronous encoder axis rotation direction restriction
Set this parameter to restrict the input travel value for the synchronous encoder axis to one
direction.
This helps to avoid reverse operation caused by such as machine vibration of synchronous
encoder input.
0: Without rotation direction restriction ............................... Rotation direction restriction is
1: Enable only for current value increase direction ............ Enable only the input travel
2: Enable only for current value decrease direction ........... Enable only the input travel
The input travel value in the opposite direction of the enabled direction accumulates as a
rotation direction restricted amount, and it will be reflected when the input travel value
moves in the enabled direction again. Therefore, the current value of synchronous
encoder axis does not deviate when the reverse operation is repeated.
The rotation direction restricted amount is set to 0 at the synchronous encoder axis
connection and current value change.
For "1: Enable only for current value increase direction " is set
in " Pr.328 Synchronous encoder axis rotation direction restriction ".
Speed before rotation
direction restriction
Md.322 Synchronous encoder axis
speed (Speed after rotation
direction restriction)
Md.324 Synchronous encoder axis
rotation direction restriction
amount
The input travel value accumulates as a rotation
direction restricted amount,
the input travel value moves in the enabled direction.
2 - 27
Chapter 2 Input Axis Module
not executed.
value in the increasing direction
of the synchronous encoder
axis current value.
value in the decreasing
direction of the synchronous
encoder axis current value.
and will be reflected when
t
t
t

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